Magnum Energy ME3112-U User manual

ME Series
Modified Sine Wave Inverter/Chargers
Owner’s Manual

© 2017 Sensata Technologies Page i
Thank you from all of us at Sensata Technologies for purchasing this ME Series inverter/charger.
The ME Series products include the ME2012, ME2512 and ME3112 inverters; all under the Magnum
Energy brand from Sensata Technologies. We understand that you have many purchasing options
in the marketplace, and we are pleased that you have decided on this product.
At Sensata, we are committed to providing you with quality products and services, and hope that
your experience with us is pleasant and professional.
Disclaimer of Liability
The use of this manual and the conditions or methods of installation, operation, use, and
maintenance of the ME Series inverter/charger is beyond the control of Sensata Technologies.
Therefore, this company does not assume responsibility and expressly disclaims any liability for
loss, damage, or expense whether direct, indirect, consequential, or incidental that may arise out
of or be in anyway connected with such installation, operation, use, or maintenance.
Due to continuous improvements and product updates, the images shown in this manual may not
exactly match the unit purchased.
Restrictions on Use
The ME Series inverter/charger may only be used in life support devices or systems with the express
written approval of Sensata Technologies. Failure of this inverter can reasonably be expected to
cause the failure of that life-support device or system, or to affect the safety or effectiveness of
that device or system. If the ME Series inverter fails, it is reasonable to assume that the health
of the user or other persons may be endangered.
Copyright Notice
Copyright ©by2017 Sensata Technologies. All rights reserved. Permission to copy, distribute, and/
or modify this document is prohibited without express written permission from Sensata.
Document Information
Description – ME Series Owner’s Manual
Part Number and Revision – 64-0002 Rev D
Date Published – April 2017
This entire manual is available for download—with many of the diagrams available in color—at:
www.SensataPower.com
Contact Information
For Magnum Energy products:
Sensata Technologies
Phone: [phone]
Fax: [phone]
Web: www.SensataPower.com
Record unit’s model & serial number in case you need to provide this information in the future.
Model: Serial Number:
ME2012 (-15B/-20B) WB1/B1
ME2512 WC1/C1
ME3112 WD1/D1

© 2017 Sensata Technologies
Page ii
Safety Information
IMPORTANT SAFETY INSTRUCTIONS
SAVE THESE INSTRUCTIONS
THIS MANUAL CONTAINS IMPORTANT INSTRUCTIONS FOR THE ME SERIES INVERTER/CHARGER
THAT SHALL BE FOLLOWED DURING THE INSTALLATION AND OPERATION OF THIS PRODUCT.
Before using the ME Series, read all instructions and cautionary markings. Also, be sure to review
the individual manuals provided for each component of the system. The installation instructions
are for use by qualified personnel only. Do not perform any installation or servicing other than
that specified in this owner’s manual unless you are qualified to do so. Incorrect installation or
servicing may result in a risk of electric shock, fire, or other safety hazard.
Safety Symbols
The following safety symbols have been placed throughout this manual to indicate dangerous and
important safety instructions.
WARNING: This symbol indicates that failure to take a specified action could result in
physical harm to the user.
CAUTION: This symbol indicates that failure to take a specified action could result in
damage to the equipment.
Info: This symbol indicates information that emphasizes or supplements important
points of the main text.
Safety Precautions
• All electrical work must be performed in accordance with local and national electrical codes.
• This product is designed for indoor/compartment installation. It must not be exposed to rain,
snow, moisture, or liquids of any type.
• Use insulated tools to reduce the chance of electrical shock or accidental short circuits.
• There are no user-serviceable parts contained in this product.
• This unit is provided with integral protection against overloads.
• Live power may be present at more than one point since an inverter utilizes both DC (batteries,
PV, etc.,) and AC (utility or generator) power. To reduce risk of electric shock, ensure all DC
and AC wiring is disconnected prior to installing or performing maintenance on the inverter.
Turning off the inverter will not reduce this risk, the inverter must be totally disconnected
from all sources.
• Use Class 1 wiring methods for field wiring connections to terminals of a Class 2 circuit.
• Listed or labeled equipment shall be installed and used in accordance with any instructions
included in the listing or labeling.
• Always verify proper wiring prior to starting the inverter.
• Use only copper wires with a minimum temperature rating of 90°C (194°F).
• AC wiring must be no less than 10 AWG (5.3 mm²) gauge copper wire.
• Battery cables should be no less than #4/0 AWG (107.2 mm²) for 12-volt systems. Crimped
and sealed copper ring terminal lugs with a 5/16 hole should be used to connect to the DC
terminals on the inverter.
• Torque all AC wiring connections and DC cable connections to the required torque values.
• The inverter must be properly installed, see Section 2.2 “Mounting the Inverter” in this manual.
• Overcurrent protection for the battery supply is not provided as an integral part of this
inverter. Overcurrent protection of the battery cables must be provided as part of the system
installation. Refer to Section 2.4 “DC Wiring” for more information.

Page iii
© 2017 Sensata Technologies
Safety Information
• Overcurrent protection for the AC output wiring is not provided as an integral part of this
inverter. Overcurrent protection of the AC output wiring must be provided as part of the
system installation. Refer to Section 2.5 “AC Wiring” for more information.
• The AC output neutral conductor and the DC negative conductors are not connected (bonded)
to the inverter chassis. Both the input and output conductors are isolated from the enclosure
and each other. System grounding, if required, is the responsibility of the system installer and
must comply with local and national electrical codes and standards. Refer to the Section 2.6
“Grounding Inverters” for more information.
Battery Safety
• Use insulated tools and be very careful when working around batteries, they can produce
extremely high currents if short-circuited (e.g., dropping a metal tool across the battery
terminal), which could cause a fire or explosion.
• Read and follow the battery manufacturer’s safety precautions before installing the inverter
and batteries. Always verify proper polarity and voltage before connecting the batteries
to the inverter. Once the batteries are connected to the inverter, ensure the maintenance
and charging requirements (i.e., charge voltage and charge rate) provided by the battery
manufacturer are followed to extend the life of the batteries and to prevent damage to the
batteries while charging.
• Wear eye protection such as safety glasses, and avoid touching your eyes and face when
working with batteries to keep any fluid/corrosion on the battery from coming in contact
with eyes and skin. Have plenty of fresh water and soap nearby and thoroughly wash in case
battery acid contacts skin, clothing, or eyes. In the event of exposure to the eyes, flood them
for at least 15 minutes with running water and seek immediate medical attention. Baking soda
neutralizes lead acid battery electrolyte and vinegar neutralizes spilled NiCad and NiFe battery
electrolyte; depending on your battery type, keep a supply on hand near the batteries.
• Remove all jewelry such as rings, watches, bracelets, etc., when installing or performing
maintenance on the batteries and inverter. A battery can produce a short-circuit current high
enough to weld metal jewelry, causing severe burns.
• Never work alone. Always have someone within the range of your voice or close enough to
come to your aid when working around batteries.
• Use proper lifting techniques when working with batteries.
• Never use old or untested batteries. Check each battery’s label for age, type, and date code
to ensure all batteries are identical.
• Batteries are sensitive to changes in temperature. Install batteries in a stable environment.
• Batteries can produce explosive gasses, so install batteries in a well-ventilated area. For
compartment or enclosure installations, always vent batteries from the highest point to the
outside. Design the battery enclosure to prevent accumulation and concentration of hydrogen
gas in “pockets” at the top of the compartment.
• Provide at least one inch (2.5 cm) of air space between batteries to provide optimum cooling.
• Never smoke or allow a spark near batteries.
• To prevent a spark at the battery and reduce the chance of explosion, always connect the
cables to the batteries first. Then connect the cables to the inverter.
• Never charge a frozen battery.
• The battery bank should be installed in a clean, dry, ventilated environment where they are
protected from high and low temperatures. If installed in a vehicle/boat, the batteries must
be mounted upright (if using liquid batteries) and securely fastened. The location must be
fully accessible and protected from exposure to heat producing devices, and away from any
fuel tanks.

© 2017 Sensata Technologies
Page iv
Safety Information
CONSIGNES DE SÉCURITÉ IMPORTANTES
CONSERVER CES INSTRUCTIONS
CE MANUEL CONTIENT DE IMPORTANTES POUR LA SÉRIE ME ONDULEUR/CHARGEUR QUI DOIVENT
ETRE SUIVIES PENDANT L’INSTALLATION ET FONCTIONNEMENT DE CE PRODUIT. Avant d’utiliser
la série ME, lire toutes les instructions etles mises en garde. Aussi, n’oubliez pas depasser en revue
les différents manuels fournispour chaque composant du système. Lesinstructions d’installation
sont pour une utilisationpar du personnel qualifié. Ne pas effectuer une installation ou d’entretien
autres que ceux spécifiés dans ce manuel, sauf si vous êtes qualifié pour le faire. Une mauvaise
installation ou d’entretien peut entraîner un risque de choc électrique, un incendie ou autre danger
pour la sécurité.
Symboles de sécurité
Les symboles de sécurité suivants ont été placéstout au long de ce manuel pour indiquer des
conditions dangereuses et les consignes de sécurité importantes.
AVERTISSEMENT: Ce symbole indique que le défaut de prendre une action spécifiée
pourraitcauser des dommages physiques à l’utilisateur.
ATTENTION: Ce symbole indique que le défaut de prendre une action spécifiée peut
entraîner des dommages à l’équipement.
Info: Ce symbole indique une information qui met l’accent ou des suppléments points
importants du texte principal.
Consignes de sécurité
• Tous les travaux électriques doivent être effectués en conformité avec les codes locaux et
• Ce produit est conçu pour l’installation / du compartiment intérieur. Il ne doit pas être exposé
à la pluie, la neige, l’humidité ou des liquides de tout type.
• Utiliser des outils isolés pour réduire le risque de choc électrique ou courts-circuits accidentels.
• Il n’ya pas de pièces réparables par l’utilisateur de ce produit.
• Cet appareil est fourni avec une protection intégrale contre les surcharges.
• Puissance en direct peuvent être présents à plus d’un point depuis un onduleur utilise à la fois
DC (piles, PV, etc) et AC (utilitaire ou générateur) d’alimentation. Pour réduire le risque de
choc électrique, assurez-vous que tout le câblage DC et AC est débranchée avant l’installation
ou la maintenance sur le variateur. Mise hors tension de l’onduleur ne réduira pas ce risque,
l’onduleur doit être totalement déconnectée de toutes les sources.
• Utiliser des méthodes de câblage classe 1 pour les connexions de câblage sur le terrain aux
bornes d’un circuit de Classe 2.
• En vente ou de l’équipement étiqueté doit être installé et utilisé conformément aux instructions
figurant dans la liste ou l’étiquetage.
• Toujours vérifier le câblage avant de commencer l’onduleur.
• Utilisez des fils de cuivre seulement avec une cote de température minimale de 90°C (194°F).
• AC câblage ne doit pas être inférieure à 10 AWG (5.3 mm²) de cuivre de calibre câblage.
• Les câbles de batterie ne doit pas être inférieur à #4/0 AWG (107.2 mm²) pour 12-volt
systèmes. Frisées et scellé cosses en cuivre anneau des bornes avec un trou de 5/16 doit être
utilisé pour se connecter à des bornes de courant continu sur l’onduleur.
• Couple de serrage de tous les AC connexions de câblage et DC connexions de câble pour les
valeurs de couple requises.
• L’onduleur doit être correctement monté, voir le montage de la section onduleur dans le
chapitre Installation de ce manuel.
• Protection contre les surintensités pour l’alimentation de la batterie n’est pas fourni en tant
que partie intégrante de cet inverseur. La protection contre les surintensités des câbles de
batterie doivent être fournis dans le cadre de l’installation du système. Se reporter à la
Section 2.4 DC Câblage pour plus d’informations.

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© 2017 Sensata Technologies
Safety Information
• La protection contre les surintensités pour le câblage de sortie CA n’est pas fourni en tant que
partie intégrante de cet inverseur. Protection contre les surintensités du câblage de sortie CA
doit être fournie dans le cadre de l’installation du système. Reportez-vous à la Section 2.5
Câblage ca pour plus d’informations.
• Le conducteur de courant alternatif de sortie neutre et les conducteurs à courant continu
négatives ne sont pas connectés (servitude) au châssis inverseur. La fois l’entrée et des con-
ducteurs de sortie sont isolés de l’enceinte et l’autre. La terre du système, si nécessaire, est
de la responsabilité de l’installateur du système et doit se conformer à des codes locaux et
nationaux et les normes électriques. Reportez-vous aux Section 2.6 Les onduleur à la terre
pour plus d’informations.
Sécurité de la batterie
• Utiliser des outils isolés et être très prudent lorsque vous travaillez près des batteries, elles peuvent
produire des courants extrêmement élevés si en court-circuit (par exemple, échapper un outil
métallique à travers la borne de la batterie), ce qui pourrait provoquer un incendie ou une explosion.
• Lisez et suivez les consignes de sécurité du fabricant de la batterie avant d’installer l’onduleur et
des batteries. Toujours vérifier la polarité et la tension avant de brancher les batteries à l’onduleur.
Une fois que les batteries sont connectées à l’onduleur, assurer la maintenance et les exigences de
charge (c.-à-tension de charge et taux de charge) fournis par le fabricant de la batterie sont suivies
pour prolonger la vie des batteries et pour éviter d’endommager les batteries pendant la charge.
• Porter des lunettes de protection tels que des lunettes de sécurité, et évitez de toucher vos
yeux et le visage lorsque l’on travaille avec des piles de garder tout fluide / corrosion sur
la batterie d’entrer en contact avec les yeux et la peau. Ayez suffisamment d’eau fraîche et
de savon à proximité et se laver dans le cas d’acide contact avec la peau de la batterie, les
vêtements ou les yeux. Dans le cas d’exposition pour les yeux, les inonder pendant au moins
15 minutes à l’eau courante et consulter immédiatement un médecin. Le bicarbonate de
soude neutralise l’acide de plomb électrolyte de la batterie et le vinaigre neutralise renversé
NiCad et NiFe batterie à électrolyte; en fonction de votre type de batterie, gardez sous la main
près des batteries.
• Enlevez tous les bijoux tels que bagues, montres, bracelets, etc, lors de l’installation ou la
maintenance sur les batteries et l’onduleur. Une batterie peut produire un court-circuit assez
de courant élevé pour souder les bijoux en métal, provoquant de graves brûlures.
• Ne jamais travailler seul. Toujours avoir quelqu’un au sein de la gamme de votre voix ou
suffisamment près pour vous venir en aide lorsque vous travaillez près des batteries.
• Utiliser des techniques de levage appropriées lorsque vous travaillez avec des piles.
• Ne jamais utiliser de piles usagées ou non testés. Vérifiez l’étiquette de chaque batterie à
l’âge, le type et le code de date afin d’assurer toutes les batteries sont identiques.
• Piles sensibles aux changements temporaires, installer dans un environnement stable.
• Les batteries peuvent produire des gaz explosifs, etc installer les piles dans un endroit bien
ventilé. Pour les installations compartiment ou une enceinte, toujours évacuer les piles du
plus haut point à l’extérieur. Concevoir le boîtier de piles pour éviter l’accumulation et la
concentration de gaz d’hydrogène dans “poches” en haut du compartiment.
• Fournir au moins un pouce de l’espace aérien entre les batteries pour fournir un refroidissement optimal.
• Ne jamais fumer ou laisser une étincelle près des batteries.
• Pour éviter une étincelle à la batterie et de réduire le risque d’explosion, toujours connecter
les câbles aux batteries en premier. Ensuite, connectez les câbles à l’onduleur.
• Ne jamais charger une batterie gelée.
• La banque de la batterie doit être installé dans un endroit propre, sec, aéré et où ils sont
protégés contre les températures élevées et basses. S’il est installé dans un véhicule / bateau,
les batteries doivent être monté en position verticale (si vous utilisez des piles liquides) et
solidement fixés. L’emplacement doit être pleinement accessible et protégé contre l’exposition
à la chaleur la fabrication de dispositifs, et loin de toute réservoirs de carburant.

Page vi © 2017 Sensata Technologies
Table of Contents
1.0 Introduction ...........................................................................................1
1.1 How an Inverter/Charger Works ............................................................................ 1
1.2 What Appliances will run from a Modified Sine Wave Inverter..................................... 2
1.3 Features and Benefits........................................................................................... 2
2.0 Installation.............................................................................................5
2.1 Pre-Installation ................................................................................................... 5
2.1.1 Unpacking and Inspection................................................................................ 5
2.1.2 Required Tools and Materials ............................................................................ 5
2.1.3 Locating the Inverter....................................................................................... 7
2.2 Mounting the Inverter .......................................................................................... 8
2.3 Wiring the Inverter – General Requirements.......................................................... 10
2.3.1 Protecting Wire – Conduit Box .........................................................................10
2.3.2 Wiring Requirements......................................................................................10
2.3.3 Wire Routing.................................................................................................10
2.3.4 Torque Requirements .....................................................................................10
2.4 DC Wiring......................................................................................................... 11
2.4.1 DC Wire Sizing ..............................................................................................13
2.4.2 DC Overcurrent Protection ..............................................................................13
2.4.3 DC Cable Connections ....................................................................................14
2.4.4 Wiring the Battery Bank .................................................................................15
2.4.5 Battery Temperature Sensor Installation and Wiring ...........................................15
2.4.6 Wiring the Inverter to the Battery Bank ............................................................16
2.5 AC Wiring ......................................................................................................... 17
2.5.1 Pre-AC Wiring Requirements ...........................................................................17
2.5.2 AC Wire Size and Overcurrent Protection...........................................................17
2.5.3 Recommended GFCIs (Ground Fault Circuit Interrupters) ....................................18
2.5.4 AC Terminal Block Connections (ME2012, ME2512, and ME3112) .........................18
2.5.5 AC Conductor Wiring ......................................................................................19
2.5.6 AC Wiring Configuration..................................................................................20
2.6 Grounding Inverters........................................................................................... 26
2.6.1 Equipment Grounding.....................................................................................26
2.6.2 Grounding on Boats .......................................................................................27
2.6.3 Neutral to Safety Ground Bonding....................................................................28
2.6.4 Connecting a Large DC Ground Wire.................................................................29
2.7 Inverter Notification Requirements....................................................................... 29
2.8 Final Inspection................................................................................................. 29
2.9 Functional Test .................................................................................................. 30
3.0 Operation .............................................................................................31
3.1 Inverter Mode ................................................................................................... 31
3.2 Standby Mode ................................................................................................... 32
3.3 Battery Charging ............................................................................................... 32
3.4 Transfer Time.................................................................................................... 34
3.5 Battery Temperature Sensor Operation ................................................................. 34
3.6 Protection Circuitry Operation.............................................................................. 35
3.7 Inverter Startup ................................................................................................ 36
3.8 Factory Default Values........................................................................................ 37
3.9 Inverter Fan Operation ....................................................................................... 38
3.10 Using a Remote with the ME Series Inverter .......................................................... 38

© 2017 Sensata Technologies Page vii
Table of Contents
4.0 Maintenance and Troubleshooting........................................................39
4.1 Recommended Inverter and Battery Care.............................................................. 39
4.2 Storage for Mobile Installations ........................................................................... 39
4.3 Troubleshooting................................................................................................. 39
4.4 Resetting the Inverter ........................................................................................ 41
4.4.1 Performing an Inverter Reset ..........................................................................41
4.4.2 Performing a Power Reset ...............................................................................41
Appendix A – Specifications and Optional Equipment....................................42
A-1 Inverter/Charger Specifications ........................................................................... 42
A-2 Optional Equipment and Accessories .................................................................... 43
Appendix B – Battery Information.................................................................44
B-1 Battery Location ................................................................................................ 44
B-2 Battery Types.................................................................................................... 44
B-3 Battery Temperature .......................................................................................... 44
B-4 Battery Bank Sizing ........................................................................................... 44
B-5 Battery Bank Sizing Worksheet............................................................................ 45
B-6 Battery Wiring Configurations.............................................................................. 46
B-6.1 Series Wiring ................................................................................................46
B-6.2 Parallel Wiring ...............................................................................................46
B-6.3 Series-Parallel Wiring .....................................................................................46
Appendix C – Power Consumption & Output Waveforms ...............................48
C-1 Appliances and Run Time.................................................................................... 48
C-2 Output Waveform ............................................................................................. 48
Appendix D – Inverter/Charger Terminology ................................................49
Appendix E – Warranty & Service..................................................................51
E-1 Limited Warranty............................................................................................... 51
E-2 How to Receive Repair Service............................................................................. 51

Page viii © 2017 Sensata Technologies
List of Figures
Figure 1-1, Power Switch, Status LED, and Accessory Connection Ports................................ 2
Figure 1-2, Electrical Connection Points ........................................................................... 3
Figure 1-3, Left Side Features ........................................................................................ 4
Figure 2-1, Simplified Installation Diagram for Permanent Installations ................................ 6
Figure 2-2, Approved Mounting Positions ......................................................................... 8
Figure 2-3, ME Series Dimensions and Side Reference ....................................................... 9
Figure 2-4, DC and Battery Temperature Sensor Wiring ....................................................12
Figure 2-5, Battery Hardware Installation .......................................................................14
Figure 2-6, Inverter DC Hardware Installation .................................................................14
Figure 2-7, Battery Temperature Sensor .........................................................................15
Figure 2-8, AC Terminal Block .......................................................................................18
Figure 2-9, AC Wiring for Single In – Single Out (30A) Configurations.................................21
Figure 2-10, AC Wiring for Single In – Single Out (60A) Configurations ...............................22
Figure 2-11, AC Wiring for Single In – Dual Out Configurations ..........................................23
Figure 2-12, AC Wiring for Dual In – Single Out Configurations ..........................................24
Figure 2-13, AC Wiring for Dual In – Dual Out Configurations ............................................25
Figure 2-14, Neutral-to-Ground Connection (Inverter Mode)..............................................28
Figure 2-15, Neutral-to-Ground Connection (Standby Mode)..............................................28
Figure 2-16, Connecting a Large DC Ground Wire ............................................................29
Figure 2-17, Warning Label...........................................................................................29
Figure 2-18, AC Voltage Checks.....................................................................................31
Figure 3-1, Power Flow – Inverter Mode..........................................................................32
Figure 3-2, Power Flow – Standby Mode .........................................................................33
Figure 3-3, Automatic 4-Stage Charging Graph................................................................34
Figure 3-4, BTS Temperature to Charge Voltage Change ...................................................35
Figure 3-5, Power Switch and Status Indicator.................................................................37
Figure 4-1, Performing an Inverter Reset ........................................................................42
Figure B-1, Series Battery Wiring...................................................................................47
Figure B-2, Parallel Battery Wiring .................................................................................47
Figure B-3, Series-Parallel Battery Wiring .......................................................................47
Figure B-4, Battery Bank Wiring Examples (12-volt).........................................................48
Figure C-1, AC Waveforms ............................................................................................49
List of Tables
Table 2-1, Recommended DC Wire/Overcurrent Device for Rated Use .................................13
Table 2-2, DC Wire Size For Increased Distance (in free air) ..............................................14
Table 2-3, AC Input/Output Wiring Configurations ............................................................20
Table 2-4, Equipment Grounding Conductor Sizing ...........................................................26
Table 3-1, Inverter Battery Turn On/Off Levels.................................................................36
Table 3-2, Inverter/Charger Default Values .....................................................................38
Table 3-3, Inverter Compatibility Level ...........................................................................39
Table 4-1, Basic Troubleshooting....................................................................................40
Table C-1, Typical Appliance Power Consumption..............................................................49

Page 1
© 2017 Sensata Technologies
Introduction
1.0 Introduction
The ME Series is a modified sine wave inverter designed especially for mobile applications.
Powerful, yet simple to operate, this inverter/charger will provide you with the years of trouble-
free performance—backed by our limited 3-year warranty.
Installation is easy. Simply connect the inverter’s output to your distribution circuits or electrical
panel, connect your AC to the inverter’s easy-to-reach terminal block, connect the batteries, and
then switch it on for power.
Info: This is a sizable manual and much of it is fairly technical. Terms may be used
throughout the manual that are unfamiliar to you. Refer to the Inverter/Charger
Terminology glossary in Appendix D for clarification.
The ME Series inverter/chargers provide the following:
• 2000, 2500, or 3100-watt models in a small footprint—less area needed for installation
• Modified sine wave output
• Automatic Power Factor Corrected (PFC) multi-stage battery charging
• RS485 standard communication protocol
• Remote and Network ports (easy connection for optional accessories)
• Inverter-mounted ON/OFF switch with LED indicator
• 30 amps per leg AC pass-thru capability
• DC terminal covers with 360 degree connection
• Field-serviceable for qualified personnel—tested repair kits available
• Automatic battery temperature compensation (when using Battery Temperature Sensor)
for optimum charging even during extreme temperature changes
• Overcurrent, over-temperature, and high/low battery voltage protection
Regulatory Compliance
The ME Series inverter/charger is designated as a Standalone power inverter with an internal
battery charger. It can be connected to shorepower/utility grid (or to a generator) to allow the
inverter batteries to be charged, and to power inverter loads while connected. The ME series is
not a grid-interactive (also known as utility-interactive) inverter and does not have the capability
to export (or sell) power back into the utility grid.
The ME Series has been tested and listed to UL 458, 5th Edition (Power Converters/Inverters
and Power Converter/Inverter Systems for Land Vehicles and Marine Crafts) for use in the US;
and is also certified to CSA C22.2 No. 107.1-01 (General Use Power Supplies) for use in Canada.
It has been tested and certified to these product safety standards by Intertek Testing Services
(known as ETL), which is a Nationally Recognized Testing Laboratory (NRTL). NRTL’s are qualified
organizations that meet Occupational Safety and Health Administration (OSHA) regulations to
perform independent safety testing and product certification.
1.1 How an Inverter/Charger Works
An inverter takes direct current (DC) from your batteries and turns it into alternating current (AC).
It also takes alternating current (when connected to an onboard generator or to utility power)
and transforms it into direct current to charge your batteries. There are two modes of operation:
• Inverter Mode: When the inverter is properly connected to batteries and turned on, the
direct current (DC) from the batteries is transformed into a modified sine wave alternating
current (AC). This AC is similar to the voltage provided by a utility for your home, and is used
to power the electrical appliances (i.e., AC loads) connected to the inverter’s output.
• Standby Mode: When an external source of AC power (e.g., utility power or onboard
generator) is connected and qualified on the inverter’s AC input, it operates in Standby
mode. In Standby mode, the unit operates as a battery charger to convert the incoming AC
power into DC power to recharge the batteries; and at the same time, automatically closes
an internal AC transfer relay to pass the incoming AC power directly to the inverter’s output
to continue powering the connected electrical appliances.

© 2017 Sensata Technologies
Page 2
Introduction
1.2 What Appliances will run from a Modified Sine Wave Inverter
Today’s inverters come in two basic output waveforms: modified sine wave (a modified square
wave—see Figure C-1) and pure sine wave. Modified sine wave inverters approximate a pure sine
waveform and will run most appliances and electronics without any problems. These inverters are
less expensive, and therefore, offer a viable alternative to more expensive pure sine inverters.
The output of the ME Series is a modified sine wave which will run most electronic and household
items, including but not limited to: TV, VCR, satellite dish receiver, computers, and printers. Some
devices such as rechargeable power supplies for phones, drills, and other like items may not run,
and could even be at risk for damage from modified sine wave inverters.
1.3 Features and Benefits
The ME Series inverter/charger is designed to allow easy access to wiring, circuit breakers, and
controls. Its die cast baseplate with one-piece aluminum cover ensures maximum durability with
minimum weight, as well as cooler, more efficient operation.
The bottom of the ME Series is equipped with the following features (see Figures 1-1 and 1-2):
1Power ON/OFF Switch – a momentary pushbutton switch that alternately turns the inverter
on or off.
2Status LED Indicator – this green LED illuminates to provide information on the inverter
or charger operation.
3Stack/Accessories Connection Port (red label) – a RJ11 port that accepts optional
accessories. Note: The stacking feature is not available with the ME Series.
4Network Connection Port (green label) – a RJ11 port that accepts optional network
capable accessories (e.g., Auto Gen Start or Battery Monitor).
5Remote Connection Port (blue label) – a RJ11 port that allows an optional remote
control to be connected.
6Battery Temperature Sensor Connection Port (yellow label) – a RJ11 port that
accepts the remote battery temperature sensor (BTS).
Figure 1-1, Power Switch, Status LED, and Accessory Connection Ports
Power ON/OFF Switch
Status LED Indicator
(Charging/Inverting)
Stack/Accessories Port
(red label – RJ11 connection)
Network Port
(green label – RJ11 connection)
Remote Port
(blue label – RJ11 connection)
Battery Temp Sensor Port
(yellow label – RJ11 connection)
1
2
3
4
5
6

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© 2017 Sensata Technologies
Introduction
Figure 1-2, Electrical Connection Points
Intake Air Vents
(and on right side)
AC Input/
Output
Connections
DC
Equipment
Ground
Terminal
Positive (+)
DC terminal
(under cover)
Negative (–)
DC terminal
(under cover)
11
10
7
8
Mounting
Flange
7DC Equipment Ground Terminal – this connection is used to tie the exposed chassis
of the inverter to the DC grounding system. This terminal accepts CU/AL conductors from
#14 to #2 AWG (2.1 to 33.6 mm2).
8AC Input/Output Connections – two 3/4” knockouts provided with cable-clamp strain
reliefs to allow and hold the AC input and output field wiring.
9Intake Air Vents –ventilation openings to pull in air to help keep the inverter cool for
peak performance.
10 Positive DC Terminal – provides 360 degree connection point for the positive (+) cable
from the battery bank; provided with a Kep or Flange nut on a 5/16-18 bolt to hold the
battery cable to the DC terminal.
11 Negative DC Terminal – provides 360 degree connection point for the negative (–) cable
from the battery bank; provided with a Kep or Flange nut on a 5/16-18 bolt to hold the
battery cable to the DC terminal.
12 Mounting Flange – used to secure the inverter to a shelf or wall.
9
12

© 2017 Sensata Technologies
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Introduction
The left side of the ME Series is equipped with the following features (see Figure 1-3):
13 Exhaust Air Vents – ventilation openings that allow heated air to be removed by the
internal cooling fan.
14 Model/Serial Number Label –includes model/serial number information, date of
manufacture, and inverter and charger specifications. See the ME specifications in
Appendix A for more information and the different models that are available.
15 AC Access Cover – provides access to the internal AC wiring terminal block (see Figure
2-8). This terminal block is used to hardwire all inverter AC input and output wiring
connections. Remove the two screws to access the AC wiring terminal block.
16 Input Circuit Breaker (CB1) – this circuit breaker protects the unit’s internal charger
wiring and pass-thru relay while in Standby mode. This circuit breaker will pop out when
it opens. Press in to reset. This input circuit breaker is not branch-circuit rated, therefore,
branch-circuit rated breakers must be installed in the inverter’s input wiring.
Output Circuit Breakers (CB2 & CB3) – these circuit breakers are branch-rated, but
are only provided on the ME2012-15B/-20B models. They allow the inverter AC loads to
be connected directly to the inverter’s output without requiring an inverter sub-panel.
These circuit breakers pop out when they open. Press in to reset. They can also be
manually pulled out to disconnect the inverter’s loads. Note: Models without AC output
breakers (CB2 & CB3) use carriage bolts to fill the breaker openings.
CAUTION: Inverter models without the output circuit breakers (CB2 and CB3) must
have branch-rated circuit breakers installed in the inverter’s output wiring.
CAUTION: The inverter’s internal AC transfer relay is rated for 30 amps per leg. The
pass-thru current must be no greater than 30 amps per leg or damage to the relays
may occur.
17
Figure 1-3, Left Side Features
13
Exhaust
Air Vents
(back side)
Model/Serial
Number Label 14
AC Access
Cover
Output Circuit Breakers
(only available on -15B, -20B
output breaker models)
AC Input Circuit
Breaker
16
15
17

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© 2017 Sensata Technologies
Installation
2.0 Installation
WARNING: Installations should be performed by qualified personnel, such as a licensed
or certified electrician. It is the installer’s responsibility to determine which safety
codes apply and to ensure that all applicable installation requirements are followed.
Applicable installation codes vary depending on the specific location and application of
the installation.
CAUTION: Review the “Important Product Safety Information” on pages ii-v before any
installation.
CAUTION: The inverter is heavy. Use proper lifting techniques during installation to
prevent personal injury.
The simplified system diagram shown in Figure 2-1 should be reviewed to assist you in planning
and designing your installation. This drawing is not intended to override or restrict any national
or local electrical codes. This drawing should not be the determining factor as to whether the
installation is compliant, that is the responsibility of the electrician and the onsite inspector.
2.1 Pre-Installation
Before installing the inverter, read the entire installation section to determine how you are going
to install your ME inverter/charger. The more thorough you plan in the beginning, the better your
inverter needs will be met.
2.1.1 Unpacking and Inspection
Carefully remove the ME Series inverter/charger from its shipping container and inspect all contents.
Verify the following items are included:
• The ME Series inverter/charger
• Red and black DC terminal covers with Phillips screws
• Two 5/16” Kep or Flange nuts (installed on the DC terminals)
• Battery Temperature Sensor
• Warning label
• ME Series Owner’s Manual
If items appear to be missing or damaged, contact your authorized Sensata Technologies dealer or
Sensata Technologies. If at all possible, keep your shipping box. It will help protect your inverter
from damage if it ever needs to be returned for service. Save your proof-of-purchase as a record
of your ownership; it will also be needed if the unit should require in-warranty service.
Record the unit’s model and serial number in the front of this manual in case you need to provide
this information in the future. It is much easier to record this information now, instead of trying
to gather it after the unit has been installed.
2.1.2 Required Tools and Materials
Hardware/Materials
• Strain-reliefs, and appropriate fittings • 1/4” mounting bolts and lock washers
• Electrical tape • Wire ties
Tools
• Miscellaneous screwdrivers • Pliers • Wire strippers
• Drill and drill bits • Pencil or marker • Multimeter
• Level • 1/2” wrench

© 2017 Sensata Technologies
Page 6
Installation
Battery Bank
120/240
VAC power
to inverter
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
240
VAC 120
VAC
120
VAC
DC
Overcurrent
protection
(Breaker or
Fuse/Switch)
ME Series
Inverter/
Charger
Main Panel Sub-Panel
120 VAC Inverter power
(or 120/240 VAC pass-thru
power) to Sub-panel
ME-BMK
Battery
Monitor with
shunt
(Magnum
Accessory)
DC
Shunt
AC
Transfer
Switch
Generator Power
120/240 VAC Output
Shore Power
120/240 VAC Output
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
BTS
ON
OFF
ON
OFF
30A
30A
ME-SBC
Smart Battery
Combiner
(Magnum
Accessory)
ME-AGS-N
Auto Gen
Start
Controller
(Magnum
Accessory)
SELECT
TECH
AGS METER SETU PSH ORE
INVE RTE
R
CH ARGER
INV
CHG
FAU LT
PWR
ON/OFF
ON/
OFF
Remote Controls (Magnum Accessories)
ME-RC50
ME-ARC50
Figure 2-1, Simplified Installation Diagram for Permanent Installations

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© 2017 Sensata Technologies
Installation
2.1.3 Locating the Inverter
Only install the inverter in a location that meets the following requirements:
Clean and Dry – The inverter should not be installed in an area that allows dust, fumes, insects, or
rodents to enter or block the inverter’s ventilation openings. This area also must be free from any
risk of condensation, water, or any other liquid that can enter or fall on the inverter. The inverter
uses stainless steel fasteners, plated copper busbars, and a power-coated aluminum base. The
internal circuit boards are conformal coated. All of this is done to help fight the harmful effects
of corrosive environments. However, the inverter’s life is uncertain if used in the above types of
environments, and inverter failure under these conditions is not covered under warranty.
Info: If the inverter is installed in an area where moisture may occur, we recommend
putting silicone dielectric grease compound into the electrical ports (Items 3-6, Figure
1-1). Before installing the cables, or if leaving any ports open, squirt a liberal amount
into each port. Silicone dielectric compound makes an effective moisture and corrosive
barrier to help protect and prevent corrosion to the RJ11 connections.
Cool – The inverter should be protected from direct sun exposure or equipment that produces
extreme heat. The ambient temperature around the inverter must not exceed 77°F (25°C) to
meet power specifications.
Ventilation – In order for the inverter to provide full output power and avoid over-temperature
fault conditions; do not cover or block the inverter’s ventilation openings, or install this inverter in
an area with limited airflow. The inverter uses two fans to provide forced-air cooling, these fans
pull in air through the intake vents (Figure 1-2, Item 9) and blow out air through the exhaust vents
(Figure 1-3, Item 13). Allow at the minimum an airspace clearance of 6” (15.2 cm) at the intake
and exhaust vents, and 3” (7.6 cm) everywhere else to provide adequate ventilation.
If installed in an enclosure, a fresh-air intake opening must be provided directly to the front side
(intake vents) of the inverter, and an exhaust opening on the back side (exhaust vents) of the
inverter. This allows cool air from the outside to flow into the inverter, and heated air to exit the
inverter and the enclosure. When mounted in an enclosed compartment, airflow must be ≥100
cfm in order to maintain no more than a 68°F (20°C) rise in compartment temperature.
CAUTION: Do not mount this inverter in a zero clearance compartment, nor cover or
obstruct the ventilation openings—overheating may result.
Safe – Keep any flammable/combustible material (e.g., paper, cloth, plastic, etc.) that may be
ignited by heat, sparks, or flames at a minimum distance of 2 feet (61 cm) away from the inverter.
WARNING: The ME Series inverter/charger is not ignition-protected. Do not install this
inverter in any area that contains extremely flammable liquids like gasoline or propane.
Close to the battery bank – The inverter should be located as close to the batteries as possible.
Long DC wires tend to loose efficiency and reduce the overall performance of an inverter. However,
the unit should NOT be installed in the same compartment as the batteries, or mounted where it
will be exposed to gases produced by the batteries. These gases are corrosive and will damage
the inverter; also, if these gases are not ventilated and allowed to collect, they could ignite and
cause an explosion.
Accessible –Do not block access to the inverter’s remote control and accessory ports, as well
as the inverter’s controls and status indicator. Also allow enough room to access the AC and DC
wiring terminals and connections, as they will need to be checked and tightened periodically. See
Figure 2-3 for the ME Series’ inverter/charger dimensions.
Away from sensitive electronic equipment – High-powered inverters can generate levels of RFI
(Radio Frequency Interference). Locate any electronic equipment susceptible to radio frequency
and electromagnetic interference as far away from the inverter as possible.

© 2017 Sensata Technologies
Page 8
Installation
2.2 Mounting the Inverter
The inverter base can reach a temperature up to 90°C (194°F) and should be mounted on a
noncombustible surface*. This surface and the mounting hardware must also be capable of
supporting at least twice the weight of the inverter. To meet regulatory requirements, the ME
Series must be mounted in one of the following positions, as shown in Figure 2-2:
• above or under a horizontal surface (shelf or table)
• or, on a vertical surface (wall) with the DC terminals to the right
• or, on a vertical surface (wall) with DC terminals toward the bottom, MP-HOOD (inverter hood)
installed on the top, and either the ME-CB or MPX-CB (conduit box) installed on the inverter’s
bottom.
Info: The ME-CB and MPX-CB enclosures prevent material from falling out the bottom
in the event of an internal fire, and also allow sufficient ventilation to prevent the
inverter from overheating under normal operating conditions. The MP-HOOD inverter
hood helps prevent items from falling inside causing damage to the inverter.
After determining the mounting position, refer to the physical dimensions as shown in Figure
2-3, or use the base of the inverter as a template to mark your mounting screw locations. After
marking the mounting screw locations, mount the unit with appropriate mounting hardware.
* Noncombustible surface – A surface made of material that will not ignite, burn, support combustion,
or release flammable vapors when subjected to fire or heat as per the ASTM E136 standard. For the
most part, these are materials that are largely comprised of inorganic matter such as stone, steel, iron,
brick, tile, concrete, slate, and glass. Avoid common building materials such as gypsum board, painted
surfaces, wall coverings, and all types of wood. Note: Sensata provides a noncombustible backplate
for mounting the inverter.
30
2020
SHELF OR TABLE MOUNTED
(UP SIDE DOWN)
SHELF OR TABLE
MOUNTED
(RIGHT SIDE UP)
WALL MOUNTED
(DC TERMINALS TO THE RIGHT)
WALL MOUNTED
(DC TERMINALS
ON THE BOTTOM*)
*WHEN THE INVERTER
IS MOUNTED IN THIS
POSITION, THE MP-
HOOD (INVERTER
HOOD ON TOP) AND
THE ME-CB OR
MPX-CB (CONDUIT
BOX ON BOTTOM) MUST
BE USED.
Figure 2-2, Approved Mounting Positions
MP-HOOD
ME-CB

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© 2017 Sensata Technologies
Installation
Figure 2-3, ME Series Dimensions and Side Reference
Bottom
Left
Side
Right
Side
Front
2"
(5.1 cm)
4 ⅞"
(12.4 cm)
4 ⅞"
(12.4 cm)
13 ¾"
(34.9 cm)
12 ⅝"
(32.1 cm)
12"
(30.5 cm)
6 ⅝"
(16.8 cm)
8"
(20.3 cm)
Exhaust Air Vents
Exhaust Air Vents
Air Intake
Vents
Air Intake Vents
Top
30
20 30
Mounting Holes
Keyhole slots
(x4)
Mounting
Holes (x4)
Use up to
9/32"
(7 mm)
screw/bolt
F
r
o
nt
20

© 2017 Sensata Technologies
Page 10
Installation
2.3 Wiring the Inverter – General Requirements
This section describes the requirements and recommendations for wiring the ME Series inverter/
charger. Before wiring the inverter/charger, read all instructions.
All wiring should meet all local codes and industry standards, and be performed by
qualified personnel such as a licensed electrician.
The NEC (National Electric Code, ANSI/NFPA 70) for the United States and the CEC (Canadian
Electrical Code) for Canada provide safe wiring standards. The NEC/CEC list requirements for wire
sizes, overcurrent protection, and installation methods/standards.
Inverter/charger systems involve power from multiple sources (e.g., inverter, generator, utility
power, batteries, etc.) which makes the wiring more hazardous and challenging.
The input and output AC and DC circuits are isolated from the inverter chassis. The inverter system
grounding is the responsibility of the installer in accordance with the NEC/CEC and local codes.
WARNING: Ensure the sources of DC power (i.e., batteries) and AC power (utility
power or AC generator) are de-energized (i.e., breakers opened, fuses removed) before
proceeding—to prevent accidental shock.
2.3.1 Protecting Wire – Conduit Box
The AC and DC wires to and from the inverter must be protected as required by code. This can be
done by using jacketed wires. Sensata Technologies offers a DC conduit box (ME-CB or MPX-CB)
that includes the necessary AC and DC inverter breakers.
Info: The strain reliefs can be removed and replaced with 3/4” grommets if you are using
either the ME-CB or MPX-CB conduit box, and the AC wires are individual conductors
(i.e., not jacketed).
2.3.2 Wiring Requirements
• All conductors that are at risk for physical damage must be protected by tape, or placed
in a raceway.
• Always check for existing electrical, plumbing, or other areas of potential damage prior to
making cuts in structural surfaces or walls.
• Do not mix AC and DC wiring in the same panel unless specifically approved/designed for
both AC and DC wiring. Where DC wiring must cross AC or vice-versa, try to make the
wires 90° to one another at the crossing point.
• Both AC and DC overcurrent protection must be provided as part of the installation.
• The inverter requires a reliable negative and ground return path directly to the battery.
• Use only copper wires with a minimum temperature rating of 90°C (194°F).
2.3.3 Wire Routing
Before connecting any wires, determine all wire routes to and from the inverter. Conductors passing
through walls, bulkheads, or other structural members must be protected to minimize insulation
damage, such as chafing. During installation, always avoid placing conductors near sources of
chafing caused by vibration or constant rubbing. Typical routing scenarios are:
• AC input wiring from utility power source to the inverter
• AC input wiring from an onboard generator (optional) to the inverter
• DC input wiring from the batteries to the inverter
• AC output wiring from the inverter to the coach’s AC main panel or to dedicated circuits
• Battery Temperature Sensor cable from the inverter to the batteries
• Remote control cable (optional) to the inverter
• Ground wiring to and from the inverter
2.3.4 Torque Requirements
Torque all AC wiring connections to 16 lbf-in (1.8 N-m). Torque DC cable connections from 10 to
12 lbf-ft (13.6 to 16.3 N-m).

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© 2017 Sensata Technologies
Installation
2.4 DC Wiring
This section describes the inverter’s required DC wire sizes, the recommended disconnect/
overcurrent protection, and how to make the DC connections to the inverter and the battery bank.
Refer to Figure 2-4 when connecting the DC wires.
WARNING: Even though DC voltage is “low voltage”, significant hazards may be
present, particularly from short circuits of the battery system.
CAUTION: The inverter is NOT reverse polarity protected, which means that if the
negative and positive battery voltage is connected backwards to the inverter, the
inverter will likely be damaged. You should verify the correct voltage polarity using
a voltmeter BEFORE connecting the DC wires. Color code the DC cables/wires with
colored tape or heat shrink tubing: RED for positive (+), WHITE for negative (–), and
GREEN (or bare copper) for DC ground to avoid polarity problems.
CAUTION: To remove battery power from the inverter, disconnect the battery positive
connection before the negative connection. This requirement can prevent damage to
the inverter and/or to an accessory connected to the inverter.
Note: When an accessory that is not powered by an inverter (e.g., ME-AGS-N and ME-BMK)
is installed and connected to the inverter (via a network communication cable ), the battery
negative connection of the inverter and each accessory must be at the same potential
(i.e., electrically common with each other) until the positive connection of each device is
removed. This prevents a high impedance path developing between the connected devices
(i.e., inverter and accessories), which can cause the network cable to become the DC return
path to the battery—possibly resulting in permanent damage to all connected devices on the
network. This can be prevented if the battery negative connection of each device is always
connected before connecting/disconnecting any battery positive.
CAUTION: Before wiring the DC cables, review the safety information at the beginning
of this manual and the instructions below to ensure a safe and long-lived system.
• The DC positive and negative cables connected to the inverter from the battery bank should
be tied together with wire ties or electrical tape approximately every 6 inches (153 mm). This
helps improve the surge capability and reduces the effects of inductance, which improves the
inverter waveform and reduces the wear of the inverter’s filter capacitors.
• Crimped and sealed copper ring terminal lugs with a 5/16” hole should be used to connect the
DC wires to the inverter’s DC terminals.
• The battery bank voltage MUST match the DC voltage required by the inverter (i.e., 12-volt
battery bank for a 12-volt inverter), or the inverter may be damaged.
• To ensure the maximum performance from the inverter, all connections from the battery bank
to the inverter should be minimized. The exceptions are the DC overcurrent disconnect in the
positive line, and a shunt in the negative line. Any other additional connection will contribute
to additional voltage drops and these extra connection points may loosen during use.
• All wiring to the battery terminals should be checked periodically (once a month) for
proper tightness. The torque requirement for the DC terminals is between 10 to 12 lbf-ft
(13.6 to 16.3 N-m). If you don’t have a torque wrench, ensure all DC terminals are tight and
cannot move.
• Be aware that overtightening or misthreading the nuts on the DC terminals can cause the
bolts to strip and snap/break off.
• Make sure cables have a smooth bend radius and do not become kinked. Long cable runs
should follow existing wire runs if possible.
• A brief spark or arc may occur when connecting the battery cables to the inverter DC terminals;
this is normal and due to the inverter’s internal capacitors being charged.