Magnum Energy MagnaSine Hybrid MSH3012RV User manual

MagnaSine Hybrid MSH3012RV
Pure Sine Wave Inverter/Charger
Owner’s Manual

© 2020 Sensata Technologies Page i
Record unit’s model & serial number in case you need to provide this information in the future.
Model: Serial Number:
MSH3012RV WBS
Disclaimer of Liability
The use of this manual and the conditions or methods of installation, operation, use, and
maintenance of the MSH3012RV inverter/charger is beyond the control of Sensata Technologies,
Inc. Therefore, this company does not assume responsibility and expressly disclaims liability for
loss, damage, or expense whether direct, indirect, consequential or incidental that may arise out
of or be any way 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 MSH3012RV inverter/charger may only be used in life support devices and systems with
the express written approval of Sensata Technologies. Failure of this inverter can reasonably be
expected to cause failure of that life support device or system, or to affect the safety or effectiveness
of that device or system. If the MSH3012RV inverter fails, it is reasonable to assume the health
of the user or other persons may be endangered.
Copyright Notice
Copyright © 2020 by Sensata Technologies. All rights reserved. Permission to copy, distribute,
and/or modify this document is prohibited without express written permission from Sensata
Technologies.
Document Information
Description – MSH3012RV Owner’s Manual
Part Number and Revision – 64-0089 Rev B
Date Published – April 2020
This manual is printed without color for cost savings. However, this entire manual is available for
download—with many diagrams available in color—on our website at: www.SensataPower.com.
Contact Information
Sensata Technologies (for Magnum Energy Products)
Customer Service: www.InverterInfo.com
Tech Support: www[email protected]
Web: www.Sensata.com
Statement of Appreciation
Thank you from all of us at Sensata Technologies for purchasing this MSH3012RV inverter/charger.
We understand that you have many purchasing options in the marketplace, and are pleased that
you have decided on a Sensata Technologies product.
At Sensata Technologies, we are committed to providing you with quality products and services,
and hope that your experience with us is pleasant and professional.

Safety Information
Page ii
IMPORTANT SAFETY INSTRUCTIONS
SAVE THESE INSTRUCTIONS
THIS MANUAL CONTAINS IMPORTANT INSTRUCTIONS FOR THE MSH3012RV INVERTER/CHARGER
THAT SHALL BE FOLLOWED DURING THE INSTALLATION AND OPERATION OF THIS PRODUCT.
Before using the MSH3012RV inverter, 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 (shorepower 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 167°F (75°C).
• AC wiring must be no less than #8 AWG (8.36 mm²) on the inverter’s input and no less than
#6 AWG (13.3 mm²) on the inverter’s output to allow the full current capacity of this inverter.
• Battery cables should be no less than #4/0 AWG (107.2 mm²). 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 mounted, see Section 2.2 “Mounting the Inverter” in this
manual.

Safety Information
© 2020 Sensata Technologies Page iii
• 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.
• 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 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 to reduce the chance of explosion, always first connect
the cables to the batteries. Then connect the cables to the inverter.
• Never charge a frozen battery.
• The battery bank should be installed in a clean, dry, ventilated environment that is protected
from high and low temperatures. When installed in a RV, 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.

Safety Information
Page iv
CONSIGNES DE SÉCURITÉ IMPORTANTES
CONSERVER CES INSTRUCTIONS
CE MANUEL CONTIENT DE IMPORTANTES POUR LA SÉRIE MSH3012RV ONDULEUR/CHARGEUR QUI
DOIVENT ETRE SUIVIES PENDANT L’INSTALLATION ET FONCTIONNEMENT DE CE PRODUIT. Avant
d’utiliser la série MSH3012RV, 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
nationaux électriques.
• 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’y a pas réparable par l’utilisateur contenues dans 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.
• Coté ou étiquetés équipement 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 75°C (167°F).
• Le câblage CA ne doit pas être inférieur à 8 AWG (8,36 mm²) à l’entrée de l’onduleur et à
au moins 6 AWG (13,3 mm²) de la sortie de l’onduleur pour permettre la maximale capacité
courant de l’onduleur.
• Les câbles de batterie ne doit ps être inférieur à #4/0 AWG. 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 toutes les connexions de câblage ca et les connexions de câbles à courant continu à des
valeurs de couple nécessaires.
• L’onduleur doit être correctement installé, voir la section 2.2 “Montage de l’onduleur” dans ce
manuel.

Safety Information
© 2020 Sensata Technologies Page v
• 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. Reportez-vous à la
section Câblage cc dans le chapitre d’installation pour plus d’informations.
• Protection contre les surintensités pour le câblage de sortie AC n’est pas fourni en tant que partie
intégrante de cet onduleur. 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 Câblage ca dans le
chapitre d’installation pour plus d’informations.
• Le conducteur de sortie CA conducteurs neutre et continue négative ne sont pas connectés (servitude)
au châssis inverseur. La fois l’entrée et des conducteurs 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 à la section
Mise à la terre Onduleurs dans le chapitre d’installation 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.
• Batteries sensibles aux changements de température. Toujours 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 © 2020 Sensata Technologies
Table of Contents
1.0 Introduction..................................................................................1
1.1 How the MSH3012RV Inverter/Charger Works .................................................... 2
1.2 Advantages of using a Pure Sine Wave Inverter .................................................. 2
1.3 Features and Benefits...................................................................................... 3
2.0 Installation ...................................................................................6
2.1 Pre-Installation............................................................................................... 6
2.1.1 Unpacking and Inspection ............................................................................. 6
2.1.2 Required Tools and Materials.......................................................................... 6
2.1.3 Locating the Inverter .................................................................................... 8
2.2 Mounting the Inverter ..................................................................................... 9
2.3 Wiring the Inverter – General Requirements......................................................11
2.3.1 Protecting Wire – Conduit Box.......................................................................11
2.3.2 Wiring Requirements ...................................................................................11
2.3.3 Wire Routing ..............................................................................................11
2.3.4 Torque Requirements...................................................................................11
2.4 DC Wiring.....................................................................................................12
2.4.1 DC Wire Sizing............................................................................................14
2.4.2 DC Overcurrent Protection............................................................................14
2.4.3 DC Cable Connections..................................................................................15
2.4.4 Wiring the DC Overcurrent Protection Device ..................................................16
2.4.5 Wiring the Battery Bank ...............................................................................16
2.4.6 Battery Temperature Sensor Installation and Wiring.........................................17
2.4.7 Wiring the Inverter to the Battery Bank..........................................................18
2.5 AC Wiring .....................................................................................................19
2.5.1 Pre-AC Wiring Requirements .........................................................................19
2.5.2 AC Wire Size and Overcurrent Protection ........................................................19
2.5.3 Recommended GFCI (Ground Fault Circuit Interruption) Outlets.........................20
2.5.4 AC Terminal Block Connections......................................................................20
2.5.5 AC Conductor Wiring ...................................................................................21
2.5.6 AC Wiring Configurations..............................................................................22
2.6 Grounding Inverters.......................................................................................26
2.6.1 Equipment Grounding Conductors..................................................................27
2.6.2 Grounding Electrode Conductors ...................................................................27
2.6.3 System Bonding Jumpers .............................................................................27
2.6.4 Neutral to Safety Ground Bonding .................................................................28
2.7 Inverter Warning Label...................................................................................29
2.8 RV-C Communication Connection Port ..............................................................29
2.9 Final Inspection.............................................................................................30
2.10 Functional Test ..............................................................................................31
3.0 Operation....................................................................................32
3.1 Inverter Mode ...............................................................................................32
3.2 Standby Mode ...............................................................................................33
3.2.1 Battery Charging.........................................................................................34
3.2.2 Transfer ....................................................................................................35
3.2.3 Load Support..............................................................................................36
3.3 Current Flow .................................................................................................37

© 2020 Sensata Technologies Page vii
Table of Contents (Continued)
3.4 Battery Temperature Sensor Operation .............................................................39
3.5 Protection Circuitry Operation..........................................................................40
3.6 Inverter Startup ............................................................................................41
3.7 Factory Default Values....................................................................................42
3.8 Using the RV-C Connector...............................................................................43
3.8.1 LED Indicator .............................................................................................43
3.9 Conditions for Saving (Non-Default) Settings.....................................................44
3.10 Assigning Addresses to the MSH3012RV Inverter ...............................................44
3.10.1 Assigning Address #2 to the MSH3012RV Inverter...........................................44
3.11 Troubleshooting the RV-C Port .........................................................................44
3.12 Inverter Fan Operation ...................................................................................45
3.13 Using a Remote with the MSH3012RV Inverter...................................................45
4.0 Troubleshooting..........................................................................46
4.1 Troubleshooting Chart ....................................................................................46
4.2 Resetting the Inverter ....................................................................................48
4.2.1 Performing an Inverter Reset ........................................................................48
4.2.2 Performing a Power Reset.............................................................................48
Appendix A – Specifications and Optional Equipment..........................49
A-1 Inverter/Charger Specifications .......................................................................49
A-2 Inverter Charts..............................................................................................50
A-2.1 Inverter Efficiency .......................................................................................50
A-2.2 Temperature and Inverter Output ..................................................................50
A-2.3 Temperature and Charger Output ..................................................................51
A-3 Inverter AC Fault Current................................................................................51
A-4 Optional Equipment and Accessories ................................................................51
Appendix B – Battery Information.......................................................52
B-1 Battery Location ............................................................................................52
B-2 Battery Types................................................................................................52
B-3 Battery Temperature ......................................................................................52
B-4 Battery Bank Sizing .......................................................................................52
B-5 Battery Bank Sizing Worksheet........................................................................53
B-6 Battery Wiring Configurations..........................................................................54
B-6.1 Series Wiring..............................................................................................54
B-6.2 Parallel Wiring ............................................................................................54
B-6.3 Series-Parallel Wiring...................................................................................54
Appendix C – Power Consumption and Output Waveforms..................56
C-1 Appliance Power Consumption .........................................................................56
C-2 Inverter Output Waveforms.............................................................................56
Appendix D – Inverter/Charger Terminology ......................................57
Appendix E – Warranty and Service Information.................................59
E-1 Limited Warranty ...........................................................................................59
E-2 How to Receive Warranty Service.....................................................................59

Page viii © 2020 Sensata Technologies
List of Figures
Figure 1-1, Power Switch, Status LED, and Accessory Connection Ports................................ 3
Figure 1-2, Electrical Connection Points ........................................................................... 4
Figure 1-3, Left Side Features ........................................................................................ 5
Figure 2-1, Simplified Installation Diagram....................................................................... 7
Figure 2-2, Approved Mounting Positions ......................................................................... 9
Figure 2-3, MSH3012RV Dimensions and Side References .................................................10
Figure 2-4, DC and Battery Temperature Sensor Wiring ....................................................13
Figure 2-5, Battery Hardware Installation .......................................................................15
Figure 2-6, Inverter DC Hardware Installation .................................................................15
Figure 2-7, Battery Temperature Sensor .........................................................................17
Figure 2-8, MSH3012RV AC Terminal Block .....................................................................20
Figure 2-9, AC Wiring for Single In – Single Out Configurations..........................................23
Figure 2-10, AC Wiring for Dual In – Single Out Configurations ..........................................24
Figure 2-11, AC Wiring for Dual In – Dual Out Configurations ............................................25
Figure 2-12, Grounding System for MSH3012RV ..............................................................26
Figure 2-13, Neutral-to-Ground Connection (Inverter Mode)..............................................28
Figure 2-14, Neutral-to-Ground Connection (Standby Mode)..............................................28
Figure 2-15, Warning Label ...........................................................................................29
Figure 2-16, RV-C Connections (Single Inverter with Accessories) ......................................29
Figure 2-17, RV-C Connections (Two Inverters with Accessories)........................................30
Figure 2-18, RV-C Connector/Plug Designation ................................................................30
Figure 2-19, AC Voltage Checks.....................................................................................31
Figure 3-1, Power Flow – Inverter Mode..........................................................................32
Figure 3-2, Power Flow – Standby Mode (Single In)..........................................................33
Figure 3-3, Power Flow – Standby Mode (Dual In)............................................................33
Figure 3-4, Automatic 4-Stage Charging Graph................................................................35
Figure 3-5, MSH3012RV Current Flow – Inverting ............................................................37
Figure 3-6, MSH3012RV Current Flow – Charging and AC Pass-thru....................................37
Figure 3-7, MSH3012RV Current Flow – Charger Back-off..................................................37
Figure 3-8, MSH3012RV Current Flow – Load Support AAC................................................38
Figure 3-9, MSH3012RV Current Flow – Load Support VDC ...............................................38
Figure 3-10, BTS Temperature to Charge Voltage Change..................................................39
Figure 3-11, Power Switch and Status Indicator...............................................................41
Figure 3-12, RV-C Port Status Indicator ..........................................................................43
Figure 4-1, Performing an Inverter Reset ........................................................................48
Figure A-1, MSH3012RV Efficiency Chart.........................................................................50
Figure A-2, Temperature to Continuous Inverter Output Power...........................................50
Figure A-3, Temperature to Continuous Charger Output Current.........................................51
Figure B-1, Series Battery Wiring...................................................................................54
Figure B-2, Parallel Battery Wiring .................................................................................54
Figure B-3, Series-Parallel Battery Wiring .......................................................................54
Figure B-4, Battery Bank Wiring Examples (12-volt).........................................................55
Figure C-1, AC Waveforms ............................................................................................56

© 2020 Sensata Technologies Page ix
List of Tables
Table 2-1, Recommended DC Wire/Overcurrent Device for Rated Use .................................14
Table 2-2, DC Wire Size For Increased Distance ...............................................................15
Table 2-3, AC Input/Output Wiring Configurations ............................................................22
Table 2-4, Equipment Grounding Conductor Sizing ...........................................................27
Table 3-1, Inverter Battery Turn On/Off Levels.................................................................40
Table 3-2, Inverter/Charger Default Values .....................................................................42
Table 3-3, Operating Status For RV-C Port.......................................................................43
Table 3-4, Inverter Compatibility Level ...........................................................................45
Table 4-1, MSH3012RV Inverter/Charger Troubleshooting .................................................46
Table A-1, AC Output Fault Current - Inverter Mode..........................................................51
Table C-1, Typical Appliance Power Consumption..............................................................56

© 2020 Sensata TechnologiesPage 1
Introduction
1.0 Introduction
Congratulations on your purchase of a MSH3012RV inverter/charger from Sensata Technologies.
The MSH3012RV is designed especially for RV applications; it is a “hybrid” pure sine wave inverter
and includes a RV-C connector to allow RV OEM’s an easy way to multiplex with this inverter.
Why is the MSH3012RV a “Hybrid”? Most inverters only use one source of energy to power
the inverter loads—either from the incoming AC power (i.e., shorepower or generator) or from
the batteries. The MSH3012RV combines the energy from both the AC input and the batteries to
power the inverter loads. This feature gives the inverter the ability to recharge the battery when
there is surplus power, or to deliver more power to the loads if they require more than the AC
input can supply by itself.
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 MSH3012RV inverter/charger includes the following:
• A 3000w/12v model in a small installation footprint
• Pure sine wave output
• Automatic PFC (Power Factor Corrected) multi-stage battery charging
• RS485 standard communication protocol
• Inverter-mounted ON/OFF switch with LED indicator
• Each input has 50-amp AC capability with intelligent AC input transfer
• Field serviceable for qualified personnel—tested repair kits available
• Automatic battery temperature compensation (when using the Battery Temperature
Sensor) for optimum charging even during extreme temperature changes
• Overcurrent, over-temperature, and high/low battery voltage protection
• RV-C connector and protocol to communicate on a RV-C network bus/backbone
• Non-volatile memory for settings
The following accessories are also available for use with the MSH3012RV inverter/charger:
• ME-AGS-N (Automatic Generator Start Module – Network version) – automatically starts/
stops your generator.
• ME-ARC50 (Advanced Remote Control) – easy to read LCD display panel that allows advanced
inverter set up, control, and troubleshooting.
• ME-BMK (Battery Monitor Kit w/ Shunt) – provides precise DC voltage/current measurements
and information on your battery’s State of Charge (SOC) condition.
• ME-RC50 (Standard Remote Control) – easy to read LCD display panel that allows standard
inverter set up, control, and troubleshooting.
Regulatory Compliance
The MSH3012RV inverter/charger is designated as a Standalone power inverter with an internal
battery charger. It can be connected to a utility grid (i.e., shorepower) or to a generator to
allow the inverter batteries to be charged, and to power inverter loads while connected. The
MSH3012RV 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 MSH3012RV is intended for RV use. It 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). Organizations that are designated as a NRTL are qualified to meet Occupational Safety
and Health Administration (OSHA) regulations to perform independent safety testing and product
certification.

Page 2© 2020 Sensata Technologies
Introduction
1.1 How the MSH3012RV Inverter/Charger Works
There are two main modes of operation associated with the MSH3012RV inverter/charger:
• Inverter Mode:
When the inverter is properly connected to batteries and turned on, the direct current (DC)
from the batteries is transformed into a pure sine wave alternating current (AC). This AC is
similar to the voltage provided by your utility and is used to power any electrical appliances
(i.e., AC loads) connected to the inverter’s output.
• Standby Mode:
When an external source of AC power (i.e., shorepower or generator) is connected and
qualified on the inverter’s AC input, it operates in Standby mode. In Standby mode, an
internal AC transfer relay automatically closes to pass the incoming AC power directly to the
inverter’s output to continue powering the connected electrical appliances. The unit is also
monitoring the AC input and “standing-by” to switch to Inverter mode if the unit detects a
power failure (or low AC voltage). While in the Standby mode, the unit can operate:
a) as a battery charger, which converts the incoming AC power into DC power to recharge
the batteries; or
b) in load support, when the incoming AC source is not large enough to power the inverter
loads by itself, additional current from the battery is provided to help power the inverter
loads.
1.2 Advantages of using a Pure Sine Wave Inverter
Today’s inverters come in three basic output waveforms: square wave, modified sine wave (which
is actually a modified square wave), and pure sine wave (see Figure C-1 in Appendix C). Modified
sine wave inverters approximate a pure sine wave form and will run most appliances (see also
Section C-1 “Appliances and Run Time” in Appendix C) 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 MSH3012RV, which is a pure sine wave inverter, is equal to or in many cases,
better than shorepower. Virtually any electronic device will operate from a pure sine wave inverter.
Motors run cooler, microwaves usually cook faster, and clocks keep better time just to name a few
examples. Without compromising quality or performance, the MagnaSine Hybrid provides you with
all the advantages of a pure sine wave inverter at a much lower cost than many on the market.
The MSH3012RV is built on the same platform as our popular ME Series modified sine wave
inverters—allowing for an easy upgrade to a pure sine wave inverter from the original ME Series
installation. This standard platform also helps reduce cost by using standard parts/accessories
across many models. Magnum accessories such as the Advanced Remote Control (ME-ARC),
Standard Remote Control (ME-RC), Automatic Generator Start – Networked (ME-AGS-N), and
Battery Monitor Kit (ME-BMK) can be used—see Section A-4 “Optional Equipment and Accessories”
for more information on these products.

© 2020 Sensata TechnologiesPage 3
Introduction
1.3 Features and Benefits
The MSH3012RV 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 MSH3012RV is equipped with the following features (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 status information on
inverter or charger operation.
3Accessories Connection Port (red label) – a RJ11 port that accepts optional pigtail
accessories (red-labeled).
Note: The MSH3012RV does not have the ability to be stacked.
4RV-C Status LED – this yellow LED is used to determine the RV-C connection’s status.
See Section 3.8 for additional information.
5RV-C Connection Port (white label) – an electrically isolated CAN communication port
that allows RV-C control of the features and settings in the inverter and in any optional
network capable Magnum accessories (i.e., Auto Gen Start or Battery Monitor). See Section
2.8 for more information.
Note: If using the RV-C connector port, do not connect a remote control. The MSH3012RV
inverter will only communicate with the remote control if connected.
6Network Connection Port (green label) – a RJ11 port that allows Magnum network
accessories (blue or green labeled) or a remote control to be connected.
Note: If using a remote control, you can NOT use the RV-C connector port. The MSH3012RV
inverter will only communicate with the remote control if connected.
7Battery Temperature Sensor 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
1
2
3
6
7
5
4
Power ON/OFF Switch
Status LED Indicator
(Charging/Inverting)
Accessories Connection Port
(red label – RJ11 connection)
RV-C Connection Port
(white label – 4-pin connection)
Network Connection Port
(green label – RJ11 connection)
Battery Temperature Sensor Port
(yellow label – RJ11 connection)
RV-C Status LED

Page 4© 2020 Sensata Technologies
Introduction
10
11
9
813
12
Figure 1-2, Electrical Connection Points
DC
Equipment
Ground
Terminal
AC Entry/
Exit
Connections
Intake Air Vents
(and on right side – front)
Positive (+)
DC terminal
(under cover)
Negative (–)
DC terminal
(under cover)
Mounting
Flange
8DC 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).
9AC Entry/Exit Connections – two 3/4” knockouts provided with cable-clamp strain
reliefs to accommodate and secure the AC input and output field wiring.
10 Intake Air Vents –ventilation openings to pull in air to help keep the inverter cool for
peak performance. The intake air vents are located on the front side and at the front on
the right side; also see Figure 2-3 for the location of the air vents.
11 Positive DC Terminal – provides a 360 degree connection point for the positive (+) cable
from the battery bank; consists of a 5/16-18 bolt with a Kep or Flange nut that holds the
battery cable to the DC terminal.
12 Negative DC Terminal – provides a 360 degree connection point for the negative (-)
cable from the battery bank; consists of a 5/16-18 bolt with a Kep or Flange nut that
holds the battery cable to the DC terminal.
13 Mounting Flange – used to secure the inverter to a shelf or wall.

© 2020 Sensata TechnologiesPage 5
Introduction
The MSH3012RV inverter’s left side is equipped with the following features (Figure 1-3):
14 Exhaust Air Vents – ventilation openings that allow heated air to be removed by the
internal cooling fan. The exhaust air vents are located on the back side and at the rear
on the right side; also see Figure 2-3 for the location of the air vents.
15 Model/Serial Number Label –includes model/serial number information, date of
manufacture, and inverter and charger specifications. See the MSH3012RV specifications
in Appendix A for more information.
16 AC Access Cover – provides access to the internal AC wiring terminal block (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.
17 AC Input Circuit Breakers (CB1 & CB2) – these two 50-amp AC circuit breakers
protect the unit’s internal charger wiring and pass-thru relay while in Standby mode.
These circuit breakers pop out when they open—press in to reset. The input circuit
breakers are not branch-rated—additional breakers that are branch-rated must be
installed in the inverter’s input wiring.
Figure 1-3, Left Side Features
CB1 & CB2
(50A) AC Inputs
AC Access
Cover
Model/Serial
Number Label
14
Exhaust Air
Vents
(& on right
side – rear)
17
16
15

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© 2020 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 iii-vi 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 to 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 on-site inspector.
2.1 Pre-Installation
Before proceeding, read the entire Installation section to determine how best to install your
MSH3012RV 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 MSH3012RV inverter/charger from its shipping container and inspect all
contents. Verify the following items are included:
• MSH3012RV inverter/charger
• Red and black DC terminal covers with Phillips screws
• AC access cover with two Phillips screws
• Two 5/16” Kep or Flange nuts (installed on the DC terminals)
• Battery Temperature Sensor
• Warning label
• MSH3012RV Owner’s Manual
If items appear to be missing or damaged, contact your authorized Magnum Energy dealer or
Sensata Technologies. If at all possible, keep your shipping box to 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
You will need to supply the following when installing your MSH3012RV inverter.
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

© 2020 Sensata TechnologiesPage 7
Installation
Figure 2-1, Simplified Installation Diagram
12-Volt
Battery Bank
120/240VAC or
120 VAC power
to inverter
ON
OF F
ON
OF F
ON
OF F
ON
OF F
ON
OF F
ON
OF F
ON
OF F
ON
OF F
240
VAC
(Standby
only)
120
VAC
120
VAC
DC
Overcurrent
Protection
(breaker or
fuse)
MSH3012RV
Inverter/
Charger
Main Panel Sub-Panel
120VAC inverter powe r
(or 120/240VAC or 120 VAC
pa ss-thr u po wer ) to sub-panel
ME-BMK
Battery
Monitor with
shunt
(Magnum
Accessory)
DC
Shunt*
AC
Transfer
Switch
ON
OF F
ON
OF F
ON
OF F
ON
OF F
ON
OF F
ON
OF F
ON
OFF
ON
OF F
ON
OF F
ON
OF F
ON
OF F
ON
OF F
ON
OF F
BTS
ME-SBC
Smart
Battery
Combiner
(Magnum
Accessory)
ME-AGS-N
Auto Gen
Start
Controller
(Magnum
Accessory)
SELECT
TE CH
AGS M ET ER SE TU PSH O RE
IN VERTE
R
CH A RGER
IN V
CHG
FAUL T
PWR
ON/OFF
ON/
OFF
Remote Controls
(Magnum Accessories)
ME-RC50 ME-ARC50
Utility Power
120/240 VAC or
120 VAC Output
(≤50 Amps)
Generator Power
120/240 VAC or
120 VAC Output
(≤50 Amps)
*DC Shunt not required if battery
monitor (i.e., ME-BMK) not used.
6-volts 6-volts
6-volts 6-volts
Note: If using a
remote control,
the RV-C port
can not be used
at the same time
(and vice versa).

Page 8
© 2020 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, a powder-coated aluminum base
and the internal circuit boards are conformal coated—to help fight the harmful effects of corrosive
environments. However, the inverter’s life is uncertain if used in these type 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 (Figure 1-1, Items
3, 6, and 7). 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 to 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 10) and blow out air through the exhaust
vents (Figure 1-3, Item 14). 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 MSH3012RV 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 lose 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. 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 MSH3012RV inverter/charger’s 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.

© 2020 Sensata TechnologiesPage 9
Installation
2.2 Mounting the Inverter
The inverter base can reach a temperature up to 194°F (90°C) 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
MSH3012RV must be mounted in one of the following positions as shown in Figure 2-2:
• above or under a horizontal surface (shelf or table),
• on a vertical surface (wall) with the DC terminals to the right,
• on a vertical surface (wall) with the DC terminals toward the bottom, and either the ME-CB or
MPX-CB conduit box installed on the inverter’s bottom.
Info: The ME-CB or MPX-CB conduit box prevents 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.
Info: Magnum provides a metal backplate for mounting the inverter. This backplate
also allows you to mount the MPX-CB conduit box (PN: BP-S single plate).
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 surfaces that are largely comprised of inorganic materials such as stone, steel,
iron, brick, tile, concrete, slate, and glass. Avoid common building materials such as gypsum board
as well as any paint, wall coverings, or wood.
Figure 2-2, Approved Mounting Positions
30
50
50
SHELF OR TABLE
MOUNTED
(RIGHT SIDE UP)
SHELF OR TABLE MOUNTED
(UP SIDE DOWN)
WALL MOUNTED
(DC TERMINALS TO THE RIGHT)
WALL MOUNTED
(DC TERMINALS
FACING DOWN*)
*WHEN THE INVERTER IS
MOUNTED IN THIS POSITION,
EITHER THE ME-CB OR
MPX-CB (CONDUIT BOX ON
BOTTOM) MUST BE USED.

Page 10
© 2020 Sensata Technologies
Installation
Figure 2-3, MSH3012RV Dimensions and Side References
Front
Bottom
Left
Side
Right
Side
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
50
Mounting Holes
Keyhole
slots (x4)
Mounting Holes (x4)
Use up to
9/32"
(7 mm)
screw/bolt
MS H3012
50