Magnum Energy ME-MR User manual

Owner’s Manual
(Revision 1.3 or higher)
ME-MR
Mini Remote Control

© 2020 Sensata Technologies ii
Thank you from all of us at Sensata Technologies for purchasing this
ME-MR remote. The ME-MR is a product under the Magnum Energy brand
from Sensata. We understand there are many purchasing options in the
marketplace, and are pleased that you have decided on a Magnum product.
We are committed to providing quality products and services. We hope 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-MR is beyond the control of Sensata
Technologies. 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 in 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 ME-MR remote 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 ME-MR remote 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 written
permission from Sensata.
Document Information
Description – ME-MR Owner’s Manual
Part Number and Revision – 64-0031 Rev F
Date Published – April 2020
This entire manual is available for download—with many of the diagrams
available in color—under the Document Library section—on our website.
Contact Information
Sensata Technologies (for Magnum Energy Products):
Customer Service: [email protected]
Tech Support: [email protected]
Web: www.SensataPower.com

ii © 2020 Sensata Technologies
Important Product Safety Instructions
This manual contains safety instructions that must be followed during the
installation and operation of this product. Read all instructions and safety
information contained in this manual before installing or using this product.
Safety Symbols
To reduce the risk of electrical shock, fire, or other safety hazard, the
following safety symbols have been placed throughout this manual to
indicate dangerous and important safety instructions.
WARNING: Indicates that failure to take a specified action could
result in physical harm to the user.
CAUTION: Indicates that failure to take a specified action could
result in damage to the equipment.
Info: Indicates information that emphasizes or supplements
important points of the main text.
Remedy: Provides possible solutions for related issues.
Product Safety Alerts
All electrical work must be performed in accordance with local, state, and
federal electrical codes.
WARNINGS:
• 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.
• Remove all jewelry such as rings, watches, bracelets, etc., when
installing or performing maintenance on the inverter.
• Always disconnect the batteries or energy source prior to
installing or performing maintenance on the inverter. Live power
may be present at more than one point since an inverter utilizes
both batteries and AC - turning off the inverter may not reduce
this risk. As long as AC power is connected, it will pass thru the
inverter regardless of the power switch on the inverter or the ON/
OFF button on the remote.

© 2020 Sensata Technologies iii
Table of Contents
1.0 Introduction............................................................... 1
2.0 Installation ................................................................ 2
2.1 Pre-Installation ................................................................. 2
2.1.1 Installation Guidelines ....................................................... 2
2.1.2 Unpacking and Inspection .................................................. 2
2.1.3 Tools Required .................................................................. 2
2.2 Installation Procedure........................................................ 3
2.2.1 Flush Mounting the Remote ................................................ 3
2.2.2 Surface Mounting the Remote using the Bezel....................... 3
2.2.3 Connecting the Remote Cable ............................................. 4
2.2.4 Connecting the ME-MR to a Magnum Inverter ....................... 4
3.0 Setup ......................................................................... 5
3.1 Navigating the Remote ...................................................... 5
3.2 Remote Feature to Inverter Compatibility ............................. 6
3.3 Remote Menu Items .......................................................... 7
3.3.1 AC IN Menu...................................................................... 7
3.3.2 Search Watts Menu ........................................................... 8
3.3.3 Battery Amp-Hours Menu ................................................... 9
3.3.4 Battery Type Menu ...........................................................11
3.3.5 Charge Rate Menu............................................................13
3.3.6 Low Battery Cut-Out (LBCO) Menu .....................................14
3.3.7 VAC Dropout Menu ...........................................................15
3.3.8 Power Save Menu.............................................................16
3.3.9 Equalize Menu .................................................................17
3.3.10 Charger Standby Menu .....................................................18
3.3.11 Power On Menu ...............................................................18
3.3.12 TECH Menu .....................................................................19
4.0 Menu Map: ME-MR Remote Control........................... 21
5.0 Operation................................................................. 22
5.1 Front Panel .....................................................................22
5.1.1 LED Indicators .................................................................22
5.1.2 LCD Display.....................................................................22
5.1.3 ME-MR Remote Buttons ....................................................22
5.2 Operating the Inverter/Charger..........................................23
5.3 System Status Messages...................................................24
5.3.1 Inverter Mode Messages ...................................................24
5.3.2 Charger Mode Messages....................................................25
5.3.3 Fault Mode Messages........................................................30
5.3.3.1 System Fault Messages .....................................................30
5.3.3.3 Internal Fault Messages ....................................................38
5.3.4 LED Indicator Guide .........................................................39
6.0 Troubleshooting....................................................... 40
6.1 Troubleshooting Tips.........................................................41
6.1.1 Inverter Problems: ...........................................................41
6.1.2 Charger Problems: ...........................................................41
6.2 Performing an Inverter Reset.............................................42
6.3 Performing a Power Reset .................................................42
7.0 Warranty Information .............................................. 43
7.1 Warranty Statement .........................................................43
7.2 Warranty Service .............................................................43

iv © 2020 Sensata Technologies
List of Figures
Figure 1-1, Front Panel Features.......................................................... 1
Figure 2-1, Cut-Out Dimensions for Flush Mounted Remote ..................... 3
Figure 2-2, Bezel Dimensions for Surface Mounted Remote ..................... 3
Figure 2-3, Remote Cable ................................................................... 4
Figure 2-4, Remote Control Connections ............................................... 4
Figure 3-1, Scrolling Home Screens ..................................................... 5
Figure 3-2, AC IN Selections ............................................................... 7
Figure 3-3, Search Watts Selections ..................................................... 8
Figure 3-4, Battery Amp-Hours Selections............................................. 9
Figure 3-5, Battery Type Selections.................................................... 11
Figure 3-6, Charge Rate Selections .................................................... 13
Figure 3-7, LBCO: Low Battery Cut-Out Selections ............................... 14
Figure 3-8, VAC Dropout Selections.................................................... 15
Figure 3-9, Power Saver Selections .................................................... 16
Figure 3-10, Equalize Selections ........................................................ 17
Figure 3-11, Charger Standby Selections ............................................ 18
Figure 3-12, Power On Selections ...................................................... 19
Figure 3-13, TECH Menus ................................................................. 20
Figure 4-1, ME-MR Remote Menu Map ................................................ 21
Figure 5-1, ME-MR Front Panel Controls and Indicators ......................... 22
Figure 5-2, Inverter Standby............................................................. 24
Figure 5-3, Inverting........................................................................ 24
Figure 5-4, Off ................................................................................ 25
Figure 5-5, Searching....................................................................... 25
Figure 5-6, Absorb Charging ............................................................. 25
Figure 5-7, Bulk Charging ................................................................. 26
Figure 5-8, Charger Standby ............................................................. 26
Figure 5-9, Charging........................................................................ 26
Figure 5-10, Equalizing..................................................................... 27
Figure 5-11, Float Charging .............................................................. 27
Figure 5-12, Full Charge ................................................................... 28
Figure 5-13, Load Support AAC ......................................................... 28
Figure 5-14, Load Support VDC ......................................................... 29
Figure 5-15, Unknown Mode ............................................................. 29
Figure 5-16, AC Overload Fault.......................................................... 30
Figure 5-17, BackFeed Fault.............................................................. 30
Figure 5-18, Breaker Tripped Fault ..................................................... 31
Figure 5-19, Dead Battery Charge Fault.............................................. 31
Figure 5-20, FET Overload Fault......................................................... 32
Figure 5-21, High Battery Fault ......................................................... 32
Figure 5-22, High Battery Temp Fault ................................................. 33
Figure 5-23, High Volts AC Fault ........................................................ 33

© 2020 Sensata Technologies v
List of Figures (continued)
Figure 5-24, Low Battery Fault .......................................................... 34
Figure 5-25, No Communication ........................................................ 34
Figure 5-26, Overcurrent Fault .......................................................... 35
Figure 5-27, Overtemp Fault ............................................................. 35
Figure 5-28, Stuck Relay Fault........................................................... 36
Figure 5-29, Tfmr Overtemp Fault...................................................... 36
Figure 5-30, Unknown Fault .............................................................. 36
Figure 5-31, Stack Clock Fault........................................................... 37
Figure 5-32, Stack Mode Fault........................................................... 37
Figure 5-33, Stack Phase Fault .......................................................... 37
Figure 5-34, Internal Bridge Fault ...................................................... 38
Figure 5-35, Internal Charger Fault .................................................... 38
Figure 5-36, Internal NTC Sensor Fault ............................................... 38
Figure 5-37, Internal Relay Fault ....................................................... 39
Figure 6-1, Performing an Inverter Reset ............................................ 42
List of Tables
Table 3-1, ME-MR (Revision 1.3) Compatibility Matrix ............................. 6
Table 3-2, Battery Amp-Hrs to Absorb Charging Time ............................. 9
Table 3-3, Battery Size to Battery Amp-Hours (estimated) .................... 10
Table 3-4, Battery Type to Charge Voltages ......................................... 12
Table 3-5, ME-MR’s Inverter/Charger Default Settings........................... 20
Table 5-1, LED Indicator Guide .......................................................... 39
Table 6-1, Remote Troubleshooting .................................................... 40

1 © 2020 Sensata Technologies
1.0 Introduction
1.0 Introduction
The ME-MR remote control allows you to monitor and customize the basic
operating parameters of your Magnum inverter/charger. This remote can be
used on all Magnum inverter/charger models.
Info: The ME-MR remote control has minimal settings available
from its menu. Careful consideration should be given to choosing
this remote over the full featured ME-RC when customizing the
inverter/charger for your particular system.
The ME-MR25 comes standard with a 25-foot, 4-conductor telephone cable
and includes non-volatile memory (preserves adjustable settings, even if
power to the remote or inverter is removed).
Info: This manual is for the ME-MR remote with Revision 1.3 or
higher. See Section 3.3.12 (TECH Menu) for information on how to
determine your revision level.
LCD
Display
LED
Indicators
SAVE/
HOLD
Button
ON/OFF
/CHANGE Button MENU/HOME
Button
The ME-MR is equipped with the following features:
• LED Indicators –The at-a-glance LEDs provide a quick indication of
the inverter’s status, or notifies you if a fault is present.
• LCD Display –The LCD display is a 8 x 2 line (16 characters total),
alphanumeric display used for setting up the inverter/charger operation, as
well as viewing current status or fault messages.
• ON/OFF or CHANGE Button –This button enables you to turn the
inverter on and off, and also serves as a “change” button to navigate through
the available settings for each menu.
• MENU or HOME Button –This button accesses the remote’s menus.
You can also return directly to the scrolling Home screens by pressing and
holding this button for 2 seconds.
• SAVE or HOLD Button –This button serves as a “save” button to
retain your settings. This button also is used as a “hold” button to stop the
Home screens from scrolling (press and hold the button for 2 seconds).
Figu re 1 - 1 , Fr on t Pa ne l Fe at u re s

© 2020 Sensata Technologies 2
2.0 Installation
2.0 Installation
Review this section and the Important Product Safety Instructions on page ii
before proceeding with the installation of your remote.
WARNING: Installations should be performed by qualified
personnel, such as a licensed or certified electrician. The installer
determines which safety codes apply and ensures all applicable
installation requirements are followed. Applicable installation codes
vary depending on the specific location and application.
CAUTION: When connecting battery power to the inverter, all
battery negative connections must be connected prior to the
battery positive connections. When removing battery power from
the inverter, the battery positive should be removed before any
battery negative connections are disconnected. This prevents any
communication chips/lines from becoming the DC return path to the
battery—causing permanent damage to all connected accessories.
Summation: Ensure all battery negative circuits are always
connected before connecting or disconnecting battery positive.
2.1 Pre-Installation
Before proceeding, read the entire Installation section to determine how best
to install your ME-MR remote. The more thorough you plan in the beginning,
the better your inverter needs will be met.
2.1.1 Installation Guidelines
• Before connecting any wires, determine the remote’s cable route
throughout the home or vehicle/boat, both to and from the inverter.
• Always check for existing electrical, plumbing, or other areas of potential
damage BEFORE drilling or cutting into walls to mount the remote.
• Make sure all wires have a smooth bend radius and do not become kinked.
• If installing this remote in a boat, RV, or truck ensure the conductors
passing through walls, bulkheads, or other structural members are
protected. This minimizes insulation damage (such as chafing) which can
be caused by vibration or constant rubbing.
2.1.2 Unpacking and Inspection
Carefully remove the ME-MR remote from its shipping container and inspect
all contents. Verify the following items are included:
• The ME-MR remote
• 25’ remote cable
• #6 x ½” Phillips screws (x2)
• #8 x ¾” Phillips screws (x4)
• ME-MR Owner’s Manual
If items appear to be missing or damaged, contact your authorized Magnum
Energy product dealer or Sensata Technologies. Save your proof-of-purchase
as a record of your ownership; it is needed if the unit should require in-
warranty service.
2.1.3 Tools Required
Installing the remote control is simple and requires the following tools:
• Phillips screwdriver • Level • Drill
• Cut-out tool (knife/saw) • Pencil • Drill Bit (7/64”)

3 © 2020 Sensata Technologies
2.0 Installation
Figu re 2 - 1 , Cut - Ou t D im e nsion s for Flu sh M ou nt e d Re m ot e
Figu re 2 - 2 , Bez el Dim e nsion s for Su r fa ce M ou nt e d Rem ot e
2 ⅜"
1 ⅛"
1 ⅛"
2
11/16
"
(6.03 cm)
(2.86 cm)
2 ⅜"
(6.03 cm)
(2.86 cm)
(6.83 cm)
Side view Back view
Bezel side viewBezel front view
(4.1 cm)
2 ⅛" (5.4 cm)
3 ⅛" (7.94 cm)
2.2.1 Flush Mounting the Remote
After selecting the desired location for flush mounting the remote, cut out
a square mounting hole measuring 2⅜” x 2⅜” (see Figure 2-1). Place the
remote into the cutout, and then use the remote to mark and pre-drill two
⅛” holes for the two supplied #6 x ½” Phillips flat head mounting screws.
2.2.2 Surface Mounting the Remote using the Bezel
After selecting the location for surface mounting the remote, use the supplied
bezel as a template to mark the mounting holes. Mark and pre-drill four ⅛”
holes (see Figure 2-2). Mount the bezel using the four #8 x ¾” screws.
2.2 Installation Procedure
Select an appropriate location to install the ME-MR remote control. Allow
ample room to access the remote’s buttons and to view the LEDs. Ensure
the viewing angle of the display is appropriate. You can either flush mount
(concealing the connection) or surface mount the remote.

© 2020 Sensata Technologies 4
2.0 Installation
Figu re 2 - 4 , Re m ot e Con t rol Conn ect ion s
2.2.3 Connecting the Remote Cable
The ME-MR comes with a remote cable to enable communication between
the inverter and the remote. The remote cable is a 25-foot, 4-conductor, flat
cable, telephony standard with 6P4C (6-position/4-conductor) connectors
on each end. When the 6P4C connectors are held side by side with both of
the connector tabs facing the same way, the color of the conductors in each
connector is the opposite from top to bottom (see Figure 2-3).
Info: The remote cable can be extended up to a length of 200 feet
without data degradation.
2.2.4 Connecting the ME-MR to a Magnum Inverter
One end of the remote cable plugs into the back side of the ME-MR, and the
other plugs into the REMOTE (blue) port on the Magnum inverter/charger
(see Figure 2-4).
Figu re 2 - 3 , Re m ot e Ca ble
BACK
Small Magnum inverters
BACK
Large Magnum inverters
4-conductor
telephone-type
opposite colors from
top to bottom
(tabs facing you)
12341234
TAB
TAB
same col or
same
col or

5 © 2020 Sensata Technologies
3.0 Setup
3.0 Setup
When the ME-MR remote is connected to a Magnum inverter/charger, the
remote’s settings determine the inverter/charger’s operating parameters.
The default settings in the remote (see Table 3-5) are adequate for most
installations. However, you can change some of the operating parameters if
needed. This section shows you how to navigate the remote, and gives you
an understanding of the function of each adjustable setting.
3.1 Navigating the Remote
The ME-MR has menu items and adjustable settings that provide the ability
to configure your inverter/charger to your specific parameters.
Info: See Figure 4-1 for a complete map of the remote’s menu
items and adjustable settings.
The items on the remote’s front panel are used to find, adjust, and save the
desired setting. They are:
• LCD Display –The LCD display shows menu items, adjustable settings,
and the meter’s display information.
Info: The LCD display returns to the scrolling Home screens to
show inverter status, DC voltage and current, and any fault present
(if applicable) after 30 seconds—if no buttons have been pressed.
Info: When the ”←” (left facing arrow) symbol is shown on the
display, it indicates that the displayed setting has been selected
and will be used.
• ON/OFF/CHANGE Button –Allows you to quickly scroll through and
select various menu items and settings after pressing the MENU button.
• MENU/HOME Button –Allows easy access to the menu items that can
help with configuring, monitoring, and troubleshooting your inverter/charger.
Press and hold this button (2 seconds) to return to the scrolling Home screens
(see Figure 3-1).
• SAVE/HOLD Button –Saves the menu item displayed on the screen.
A saved setting is denoted by the arrow symbol. Press and hold this button
(2 seconds) to stop the Home screens from automatically scrolling (“HOLD”
displays). Once the auto-scrolling has been stopped, you can press the home
screen to view the next Home screen. Press and hold again (2 seconds) to
resume auto-scrolling of the Home screens (“SCROLL” displays).
STATUS
Invert
FAULT !
Low Batt
BATTERY
11.4V
BATTERY
- 0A
N ot e : Fault screen only appears if a fault has been det ected
Battery Voltage
Battery Current
Inverter/Charger
Status
Inverter/Charger
Fault
Figure 3 - 1 , Scrolling Hom e Scree ns

© 2020 Sensata Technologies 6
3.0 Setup
Table 3-1, ME-MR (Revision 1.3) Compatibility Matrix
3.2 Remote Feature to Inverter Compatibility
The settings in the ME-MR are designed to work with the standard features
in your Magnum inverter. The ME-MR communicates with your inverter to
allow the set up and enabling of these standard features. However, when the
ME-MR is released with new software, some of the features and functionality
in the remote may not be available in an inverter or networked accessory
that has an earlier software level. In this case, the setting is not recognized
and will not function. Use Table 3-1 below to help you determine which
ME-MR (Revision 1.3) menus/features are compatible with your inverter.
1. Obtain your inverter’s software revision.
N ot e : To view the invert er’s software revision level, go t o t he TECH
m enu on your rem ot e and access the Revisions m enu.
2. Go to the Magnum Remote Compatibility page at www.SensataPower.com
to determine your inverter’s compatibility level (L1, L2, L3, L4, or L5).
3. Use Table 3-1 to determine which ME-MR features/settings you want to
use, and what inverter compatibility level is required (see the “Inverter
Level Required” column in Table 3-1).
4. If your inverter compatibility level is the same or greater than the level
required, your inverter can support the setting/feature you want.
FEATURES/SETTINGS Inverter
Level
Required
Default
Setting
MENU
Item
Selections/
Adjustments Range
AC IN 5 amps, 15 amps, 30 amps, 50 amps ≥Level 1 [1] 30 Amps**
SEARCH Off, 5 Watt, 20 Watt ≥Level 1 5 Watt
BAT AHRS 200 AH, 400 AH, 600 AH, 800 AH ≥Level 1 400 AH
BAT TYPE
GEL, Flooded, AGM 1, AGM 2 ≥Level 1
Flooded
LFP ≥Level 5
CHG RATE 10%, 50%, 100% ≥Level 1 100%
LBCO 9.0VDC, 10.0VDC, 11.0VDC*≥Level 1 10.0VDC
13.0VDC* ≥Level 5
VAC DROP 60 VAC, 80 VAC, 100 VAC ≥Level 1 80 VAC
PWR SAVE Off, On ≥Level 1 On
POWER ON Norm, Always ≥Level 1 Norm
*12- volt values shown; t hey are different for 24v and 48v invert ers.
** These set tings return t o fact ory default when power t o rem ote is r em oved.
ME-MR Compatibility Matrix Notes:
[ 1] Not available on MM/ MM- E/ MM- AE/ MMS/ MMS-E/ MMSA/ MMA m odels.

7 © 2020 Sensata Technologies
3.0 Setup
3.3 Remote Menu Items
This section covers the function of each menu item and explains what
configurable settings are available from each menu.
3.3.1 AC IN Menu
Use this menu as a quick means of changing your AC I N setting to coordinate
with the circuit breaker rating from the incoming AC source.
• AC IN – This selection ensures the inverter’s AC loads receive the
maximum current available from the utility or your generator power.
Whenever the utility or generator is connected to the inverter, the current
used to power the AC loads and to charge the batteries is monitored. When
the total current used to power the AC loads and charge the batteries begins
to approach the AC I N setting, the current that was used for charging the
batteries will automatically be reduced. This ensures the AC loads have all
the available current when needed. The feature is not available on MM and
MMS Series inverter/chargers.
Default setting: AC I N = 30 Am ps
Range: 5 Am ps, 15 Am ps, 30 Am ps, 50 Am ps
Where to set: Adjust the AC I N setting to match the current rating of the
utility power or the generator’s circuit breaker. If using multiple AC sources
(utility and generator) through an AC transfer switch, adjust this setting to
the smaller AC breaker size. This setting is dependent on the stability of the
AC source. If using a generator, factors such as altitude and output voltage
regulation may require a lower setting than the generator’s breaker size. If
the breaker on the AC source is tripping (because it is a weak breaker), try
reducing this setting to the next lower level.
N ot e : I f the ME-MR is connect ed t o a dual source invert er ( i.e.,
MSH4 024RE) , t he AC I N set t ing applies t o bot h input s ( AC1 and AC2) .
CAUTION: The AC I N setting does not limit the current to the
inverter loads. If the current to the loads on the output of the
inverter are greater than the circuit breaker rating on the incoming
AC source, you may experience nuisance tripping of this breaker.
Bottom line shows
current “saved” setting
If this setting is correct,
press MENU button to
access different menu items
If a different setting
is required:
press press press
To save the current
setting displayed:
ON/OFF
CHANGE
MENU
HOME
SAVE
HOLD
AC IN
30 Amps
AC IN
30 Amps
AC IN
5 Amps
AC IN
15 Amps
AC IN
50 Amps
Figu re 3 - 2 , AC I N Se le ct ion s

© 2020 Sensata Technologies 8
3.0 Setup
Figu re 3 - 3 , Sea r ch W a t t s Se le ct ion s
Bottom line shows
current “saved” setting
If this setting is correct,
press MENU button to
access different menu items
If a different
setting is required:
press press press
To save the current
setting displayed:
ON/OFF
CHANGE
MENU
HOME
SAVE
HOLD
SEARCH
Off
SEARCH
20 Watt
SEARCH
5 Watt
SEARCH
5 Watt
3.3.2 Search Watts Menu
• SEARCH – This selection allows you to turn off the Search Watts feature,
or to adjust the power level to determine when the feature becomes active.
If this feature is not needed, select SEARCH = Off. When the Search Watts
feature is turned off, the inverter continuously provides full AC voltage to
the loads.
Default setting: SEARCH = 5 Watt s
Range: Off, 5 Wat ts, 20 Wat ts
Info: When the Search Watts feature is active “Search” appears
on the bottom line of the LCD display, and the green INV LED will
slowly flash.
What is the Search Watts feature? This feature is used to help save
battery power by reducing the inverter’s output to search pulses when there
is no detectable load. If someone turns on a load greater than the wattage
level setting while the inverter is searching, the inverter will start inverting
to provide full voltage on its output.
Should I use the Search Watts feature? If the inverter can spend a great
deal of time searching (to reduce the power drain on your batteries) and you
can tolerate small loads (less than 5 watts) from being on, then the Search
Watts feature should be used. However, if you require some small loads
(e.g., digital clocks, satellite receivers, answering machines, etc.,) to always
be on, then this feature should be turned off (SEARCH = Off).
Where to set: The SEARCH Wat t s setting should be adjusted to the same
power level (or the next lower setting) of the smallest load that you want to
run. If you don’t know the wattage of the smallest load you want to run, turn
the switch for the load on and then decrease the SEARCH Watt s setting until
the load comes on and stays on.
Example: You have reviewed all the loads you want to run and
determined that the smallest load is a 20 watt light. Set SEARCH = 20
Watt . Whenever you turn on any load (because all the loads are greater
than 20 watts), the inverter will stop searching and start inverting to
deliver power to the load.
Info: Even though the Search Watts feature is on, some connected
equipment may draw enough current even while turned off to keep
the inverter in Invert mode.

9 © 2020 Sensata Technologies
3.0 Setup
3.3.3 Battery Amp-Hours Menu
• BAT AHRS – This selection is used to select the approximate capacity
of the battery bank that is connected to the inverter (in battery amp-
hours). This setting determines the time the battery charger is in the Absorb
Charging stage (i.e., absorption time). See Table 3-2 to correlate the battery
capacity to the absorption time.
Default setting: BAT AHRS = 400 AH
Range: 200 AH, 400 AH, 600 AH, 800 AH
Table 3-2, Battery Amp-Hrs to Absorb Charging Time
Battery Amp-Hours Selected Absorb Charging Time
Batt AmpHrs = 200 60 minutes
Batt AmpHrs = 400 90 minutes
Batt AmpHrs = 600 120 minutes
Batt AmpHrs = 800 150 minutes
Where to set: Select the setting based on the 20-hour Amp-Hour (AH)
capacity of your battery bank.
How do I determine my battery AH capacity? The inverter requires
deep cycle batteries, which are specifically made for continuous use. Deep
cycle batteries are rated either by: a) amp-hours, or b) reserve capacity in
minutes.
• Amp-Hour (AH) capacity is a measurement of how many amps a battery
can deliver for a specified length of time (usually 20 hrs) until the voltage
achieves 1.75 VDC/cell at 80°F (26°C).
• Reserve Capacity (RC) is a measure of how many minutes a battery can
deliver a certain amount of current (usually 25A) while maintaining a voltage
above 1.75 VDC/cell at 80°F (26°C).
Info: If using the Reserve Capacity (25A), the 20 hour AH capacity
can be estimated by multiplying ‘reserve capacity’ by 50%.
Bottom line shows
current “saved” setting
If this setting is correct,
press MENU button to
access different menu items
If a different setting
is required:
press press press
To save the current
setting displayed:
ON/OFF
CHANGE
MENU
HOME
SAVE
HOLD
BAT AHRS
400 AH
BAT AHRS
200 AH
BAT AHRS
400 AH
BAT AHRS
600 AH
BAT AHRS
800 AH
Figu re 3 - 4 , Bat t e r y Am p- H ou rs Sele ct ion s
Table 3-3 on the facing page provides an estimated 20 hour AH capacity
based on the group/code size, physical size, and the voltage of the battery.
If you are not sure of your battery’s 20 hour AH rating, consult your battery
manufacturer/dealer or use Table 3-3 to obtain an estimate.

© 2020 Sensata Technologies 10
3.0 Setup
Table 3-3, Battery Size to Battery Amp-Hours (estimated)
Group/
Code Size
Physical Size
(L” x W” X H”)
Battery
Voltage
Battery AHrs
(20 hour rate)
GC-2 (Golf Cart) 10 3/8 x 7 13/16 x 10 5/8 6V 220 AHrs
L16 11 11/16 x 7 x 16 11/16 6V 375 AHrs
Group 22 9 1/2 x 6 7/8 x 8 5/16 12V 55 AHrs
Group 24 10 1/4 x 6 13/16 x 8 7/8 12V 70 AHrs
Group 27 12 1/16 x 6 13/16 x 8 7/8 12V 95 AHrs
Group 31 13 x 6 13/16 x 9 7/16 12V 110 AHrs
4D 20 3/4 x 8 3/4 x 9 7/8 12V 200 AHrs
8D 20 3/4 x 11 1/8 x 9 7/8 12V 225 AHrs
Once you’ve determined the AH capacity of each battery, review how your
batteries are connected (parallel or series) to determine the total amp-hour
capacity of the battery bank.
Parallel connection
When batteries are connected in parallel (positive to positive, negative to
negative) they increase the amp-hour capacity of the battery bank, but the
voltage remains the same.
Example: You have a 12v battery bank with three 12-volt batteries
that are rated at 125 Amp-Hours (AH) each. Each of the positive
terminals are connected together and each of the negative terminals
are connected together, which means they are connected in parallel.
The AHs of each battery connected in parallel are added together (125
AH + 125 AH + 125 AH = 375 AH), but the voltage of the battery bank
stays the same (12 VDC).
Series connection
When batteries are connected in series (positive to negative) they increase
the voltage of the battery bank, but the amp-hour rate remains the same.
Example: You have a 12-volt battery bank with two 6-volt batteries
that are rated at 220 Amp-Hours (AH) each. The positive terminal of
the first battery is connected to the negative terminal of the second
battery, which means these batteries are connected in series. Since the
two 6-volt batteries are connected in series, the voltage of the batteries
are added together to produce 12-volts (6 VDC + 6 VDC = 12 VDC), but
the amp-hour capacity of the battery bank does not change (220 AH).
In battery banks where you have batteries connected in series and in parallel
—the rules are the same. The batteries connected in series are referred to
as a “series string” and the amp-hour capacity doesn’t change. Each series
string is connected together in parallel to increase the amp-hour capacity.
Add the amp-hour capacity of each series string connected in parallel to
determine the total amp-hour capacity of the battery bank.

11 © 2020 Sensata Technologies
3.0 Setup
3.3.4 Battery Type Menu
• BAT TYPE – This setting selects the battery type, which determines
the battery charge profile to ensure the batteries are receiving the proper
charge voltage.
Default setting: BAT TYPE = Flooded
Range: GEL, Flooded, AGM 1, AGM 2, LFP
◊Battery Type (GEL, Flooded, AGM 1, or AGM 2) – When the battery
type selection is GEL (for Gel batteries), Flooded (for liquid lead acid batteries),
AGM 1 (for Lifeline AGM batteries), or AGM 2 (for East Penn/Deka/Discover/
Trojan AGM batteries), the charge voltage level for the Absorption, Float, and
EQ charge modes are shown in Table 3-4—depending on the battery type
selected and the nominal inverter battery voltage.
Figu re 3 - 5 , Bat t e r y Type Se le ct ion s
Bottom line shows
current “saved” setting
If this setting is correct,
press MENU button to
access different menu items
If a different setting
is required:
press
To save the current
setting displayed:
MENU
HOME
BAT TYPE
Flooded
BAT TYPE
Flooded
BAT TYPE
AGM 1
BAT TYPE
AGM 2
BAT TYPE
LFP
press
ON/OFF
CHANGE
press
SAVE
HOLD
BAT TYPE
GEL
◊Battery Type (LFP) – The LFP selection is provided to work specifically
with lithium iron phosphate battery types and sets the charge voltage level
as shown in Table 3-4—depending on the nominal inverter battery voltage.
When the LFP battery type has been selected, the charger begins Bulk charging
whenever AC power is connected, and remains in the bulk charge stage until
the absorption charge voltage is achieved. The charger will remain in the
absorption charge stage until it is done, which is based on the Absorb Done:
Time, Amps or SOC setting. After the absorption charge is done, the charger
switches to the float charge mode, which allows the charge voltage to fall
to the float voltage level. While float charging, the charger will provide the
maximum rated current to the batteries in order to keep them fully charged
and ready if needed by the inverter. The charger will remain in Float as long as
the AC source is available on the input of the charger and the battery voltage
is above the LFP rebulk level. If the voltage drops below the LFP rebulk level
(>10 seconds), the charger restarts the Bulk and Absorption charge stages.
Info: If the LFP battery type has been selected, remove the
BTS. Otherwise, the charge voltage level will change based on
temperature changes around the BTS.
Info: When using the LFP battery type profile, the rebulk level
≤12.8V (12-volt systems), ≤25.6V (24-volt systems), or ≤51.2V
(48-volt systems) must be met for 10 seconds to rebulk.
Info: The LFP battery type selection forces the charger to go into
the Bulk charge mode each time AC is connected. However, if AC
is reconnected less than two minutes after being disconnected, the
charger will return to the previous charge mode.

© 2020 Sensata Technologies 12
3.0 Setup
Battery
Type
Inverter
Voltage
Absorption
Voltage
Float
Voltage
Equalization
Voltage
GEL
12 VDC 14.1 VDC 13.6 VDC 14.1 VDC1
24 VDC 28.2 VDC 27.2 VDC 28.2 VDC1
48 VDC 56.4 VDC 54.4 VDC 56.4 VDC1
Flooded
12 VDC 14.6 VDC 13.4 VDC 15.5 VDC
24 VDC 29.2 VDC 26.8 VDC 31.0 VDC
48 VDC 58.4 VDC 53.6 VDC 62.0 VDC
AGM 12
12 VDC 14.3 VDC 13.3 VDC415.5 VDC
24 VDC 28.6 VDC 26.6 VDC431.0 VDC
48 VDC 57.2 VDC 53.2 VDC462.0 VDC
AGM 23
12 VDC 14.5 VDC 13.5 VDC 14.5 VDC1
24 VDC 29.0 VDC 27.0 VDC 29.0 VDC1
48 VDC 58.0 VDC 54.0 VDC 58.0 VDC1
LFP
12 VDC 14.4 VDC 13.6 VDC 14.4 VDC1
24 VDC 28.8 VDC 27.2 VDC 28.8 VDC1
48 VDC 57.6 VDC 54.4 VDC 57.6 VDC1
N ot e ¹ : Volt age sam e as absorpt ion volt age—t o prevent equalization charge.
N ot e ² : Charge v olt ages for Concor d ( Lifeline Ser ies) AGM bat t er ies.
N ot e ³ : Charge v olt ages for East Penn, Dek a, Discov er and Troj an AGM bat t er ies.
N ot e 4: For invert er m odels < Level 5, t he Float Volt age level is 13.1 VDC
( 12- v olt m odels) ; 26 .2 VDC ( 24 - volt m odels) ; or 52.4 VDC ( 4 8- volt m odels) .
See Sect ion 3.2 for invert er level inform ation.
CAUTION: If using Lithium batteries and selecting the LFP battery
type profile—to prevent the charger’s output voltage level from
changing based on temperature—REMOVE the BTS from the inverter.
Info: The charge voltage levels shown in Table 3-4 are with the
Battery Temperature Sensor (BTS) at a temperature of 77° F (25° C),
or not connected. If the BTS is connected, the actual charge voltage
level will increase if the temperature around the BTS is below 77° F
(25° C), and decrease if higher than 77° F (25° C). This ensures the
batteries receive the correct charge voltage regardless of temperature.
Table 3-4, Battery Type to Charge Voltages

13 © 2020 Sensata Technologies
3.0 Setup
3.3.5 Charge Rate Menu
• CHG RATE –This selection is used to set the maximum charge rate
allowed to charge the batteries during Bulk, Absorption, Float, and Equalize
charging. The CHG RATE = 10% setting is available to help minimize
charging, while continuing to allow pass-through power.
Default setting: CHG RATE = 100%
Range: 10% , 50% , 100%
The charge rate selections are provided as a percentage of the inverter/
charger’s maximum charging capability. Refer to the label on the side of
the inverter or to the inverter/charger owner’s manual to determine its
maximum charge rate. Once you find this maximum charge rate, determine
the percentage needed to limit the charge rate to your battery bank.
Example: If the maximum charge rate of your inverter/charger is 100
amps and you need to limit the charge rate to 50 amps, choose the CHG
RATE = 50% selection (50 amps = 50% of 100 amps).
Where to set: The maximum charge rate is generally set to a C/5* rate
(C = total amp-hour capacity of the battery bank—using the 20 hr AH rate).
The C/5 rate is usually used when the objective is to charge the batteries
as quickly as possible (i.e., 400 AH ÷ 5 = 80 amp maximum charge rate).
A lower rate such as C/20* is used when the batteries need to be charged
as slow as possible. The ME-MR provides three settings for charge rate
adjustment—10, 50, and 100%. Multiply this percentage and the max charge
rate of the inverter to find the closest setting to the desired charger output.
CAUTION: The C/5 or C/20 charge rate settings are guidelines;
they are not requirements on how you should set your battery
charge rate. For specific charge rate requirements, refer to your
battery manufacturer.
Info: If multiple inverter/chargers are used on a single battery
bank, you must ensure that the total charge rate from all inverter/
chargers is limited to the max charge rate needed for your battery
bank. This setting only limits the charging on each inverter/charger
individually, not on all inverter/chargers.
* C/ 5 or C/ 20 rate – Charge rates are com m only expressed as a ratio of the t ot al
am p- hour ( AH) capacit y of t he bat t er y bank. For exam ple, wit h a 40 0 AH bat t er y
bank ( C = 400) , t he C/ 5 charge rat e is 80 A ( 4 00/ 5 = 80 A) .
Bottom line shows
current “saved” setting
If this setting is correct,
press MENU button to
access different menu items
If a different setting
is required:
press press press
To save the current
setting displayed:
ON/OFF
CHANGE
MENU
HOME
SAVE
HOLD
CHG RATE
100%
CHG RATE
10%
CHG RATE
100%
CHG RATE
50%
Figure 3 - 6 , Char ge Ra t e Select ions

© 2020 Sensata Technologies 14
3.0 Setup
3.3.6 Low Battery Cut-Out (LBCO) Menu
• LBCO –This menu is used to set the battery voltage level that turns
the inverter off to help protect the batteries from over-discharge damage.
Selections are from 9 VDC to 11 VDC (12-volt inverter models), 18 VDC to
22 VDC (24-volt inverter models), or 36 VDC to 44 VDC (48-volt inverter
models). If the battery voltage drops below the LBCO selected setpoint
continuously for more than one minute, the FAULT LED will come on, the
inverter will turn off, and the display shows “FAULT! Low Bat” (low battery
status). If the battery voltage falls below 8.5 volts (12-volt models), 17.0
volts (24-volt models) or 34.0 (48-volt models), the FAULT LED and Low Bat
status will be immediate.
Default settings: LBCO = 10.0 VDC (12-volt models), 20.0 VDC (24-volt
models) or 40.0 VDC (48-volt models).
Range: 9.0 VDC, 10.0 VDC, 11.0 VDC, 13.0 VDC (12-volt models);
18.0 VDC, 20.0 VDC, 22.0 VDC, 25.5 VDC (24-volt models);
36.0 VDC, 40.0 VDC, 44.0 VDC, 51.0 VDC (48-volt models).
Info: If the inverter shuts down from a LBCO fault, this fault will
automatically be cleared when the battery voltage increases to
the LBCI (Low Battery Cut In) level. The inverter’s LBCI level is
determined by the LBCO setting. If the LBCO is 13.0*, the unit
recovers when Vbat ≥13.4V.; if the LBCO is ≤11.0V*, the unit
recovers when Vbat ≥12.5V*.
* These are 12V values; they are different for 24V and 48V inverters.
Where to set: For Lead Acid battery types (e.g., Flooded, GEL, and AGM);
if you want to cycle the batteries slightly—but don’t want to discharge them
more than 20%*—then the LBCO setting should be from 11.5-12.2 VDC
(12-volt models), 23.0-24.4 VDC (24-volt models), or 46.0-48.8 (48-volt
models). In some applications, such as an off-grid home or when doing a lot
of dry-camping in your RV, you may want to cycle down to 50%* by setting
the LBCO from 10.0-11.4 VDC (12-volt models), 20.0-22.8 VDC (24-volt
models), or 40.0-45.6 VDC (48-volt models). In extreme circumstances, you
have the ability to discharge the batteries to 80%* by setting the LBCO to
9.0-9.5 VDC (12-volt models), 18.0-19.0 VDC (24-volt models), or 36.0-
38.0 VDC (48-volt models) before recharging.
* These dischar ge percent ages are rough est im at es; for accurat e batt ery m onit oring, a
bat t er y m on it or such as Magn um ’s ME- BMK an d a ME- RC or ME- ARC r em ot e is requir ed.
Bottom line shows
current “saved” setting
If this setting is correct,
press MENU button to
access different menu items
If a different setting
is required:
press press press
To save the current
setting displayed:
ON/OFF
CHANGE
MENU
HOME
SAVE
HOLD
LBCO
10.0VDC
N ot e: Valu es show n ar e for a 1 2- v olt in vert er
LBCO
13.0VDC
LBCO
10.0VDC
LBCO
11.0VDC
LBCO
9.0VDC
Figu re 3 - 7 , LBCO: Low Ba t t er y Cu t - Ou t Se lect ion s