Sigineer Power M6048D User manual

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Transformer Based Off Grid
Solar Inverter Charger
User’s Manual
(6KW & 12KW 48Vdc 120/240Vac Split Phase)
Version 1.3 (PN:60000-20211231)
Last edition: Dec 28th 2021
Manufacturer Information
Sigineer Power Limited
Email: [e-mail] / TEL: [phone]
US Warehouse: 4415 S 32nd St, Phoenix AZ 85040

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Table of Contents
1 Important Safety Information .........................................................................................................................3
1.1 General Safety Precautions..........................................................................................................................3
1.2 Precautions When Working with Batteries..................................................................................................4
1.3 Target Group................................................................................................................................................4
2 Introduction.....................................................................................................................................................4
2.1 General Information.....................................................................................................................................4
2.2 Mechanical Drawing....................................................................................................................................5
2.3 Features........................................................................................................................................................7
2.4 Electrical Performance.................................................................................................................................7
2.4.1 Invert..................................................................................................................................................7
2.4.2 AC & MPPT Charger.........................................................................................................................8
2.4.3 DC&AC Transfer.............................................................................................................................10
2.4.4 Power Saver.....................................................................................................................................11
2.4.5 Protections........................................................................................................................................12
2.4.6 Remote Monitoring..........................................................................................................................12
2.4.7 LCD & Specification Setup.............................................................................................................13
2.4.8 Audible Alarm..................................................................................................................................25
2.4.9 FAN Operation.................................................................................................................................25
2.4.10 Automatic Generator Start .............................................................................................................26
2.4.11Automatic Recovery Operation......................................................................................................27
2.4.12 Other Features................................................................................................................................27
3 Installation.....................................................................................................................................................27
3.1 Location ..............................................................................................................................................27
3.2 Unpacking and Inspection...................................................................................................................27
3.3 Battery Wiring.....................................................................................................................................28
3.4 PV Wiring ...........................................................................................................................................29
3.5 AC Wiring...........................................................................................................................................29
3.6 Communication With Lithium Batteries.............................................................................................31
3.7 Communication With Computer.........................................................................................................32
3.8 Grounding...........................................................................................................................................32
3.9 Mounting Flange.................................................................................................................................32
4 Maintenance & Troubleshooting ..................................................................................................................33
5 Warranty .......................................................................................................................................................35
Appendix 1 : M Series Inverter/Charger Spec Sheet.......................................................................................36
Appendix 2: M Series Inverter/Charger System Wiring Diagram...................................................................37
Please record the Sigineer Power unit’s model and serial number in case you need to provide this
information in the future. It is much easier to record this information now than try to gather it after
the unit has been installed.
Order Number:
Model Number:
Serial Number:

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1 Important Safety Information
Save This Manual! Read this manual before installation, it contains important safety, installation
and operating instructions. Keep it in a safe place for future reference.
All wiring must follow the National Electric Code, Provincial or other codes in effect at the time
of installation, regardless of suggestions in this manual. This off grid solar inverter should be
connected to a grounded wiring system. If the system ground is floating, please follow the codes
in effect.
MISTAKES TO AVOID
1 Don’t reverse the DC reverse the battery or PV terminal polarity.
2 Don’t use any third-party accessories, communication cables on the inverter.
3 Don’t wire the AC cables wrong.
4 Don’t install the inverter without AC input surge protection device (SPD)or lightning
protection.
1.1 General Safety Precautions
1.1.1 Before installing and using the M Series Off Grid Solar Inverter Charger, please read the manual and
cautionary markings on the Inverter/Charger enclosure. Be sure to read all instructions and cautionary
markings for any equipment attached to this unit. Installers must be certified technicians or electricians.
1.1.2 This product is designed for indoor/compartment installation. Do not expose the inverter/charger to
rain, snow, spray, bilge or dust. To reduce the risk of hazard, do not cover or obstruct the ventilation
openings. Do not install the inverter/charger in a zero-clearance compartment. Overheating may result.
Allow at least 30CM (11.81 inches) of clearance around the inverter for air flow. Make sure that the air can
circulate freely around the unit. A minimum air flow of 145CFM is required to prevent overheating.
1.1.3 To avoid a risk of fire and electronic shock. Make sure that any user installed wiring is in good
electrical condition and is not undersized. Do not operate the inverter with damaged or substandard wiring.
Consult a professional or your local codes for acceptable wire size to carry the necessary voltage for the
installation and intended usage.
1.1.4 This equipment contains components which can produce arcs or sparks. To prevent fire or explosion
do not install in compartments containing batteries or flammable materials or in locations which require
ignition protected equipment. This includes any space containing gasoline-powered machinery, fuel tanks,
or joints, fittings, or other connection between components of the fuel system. See the Warranty section in
the manual for instructions on obtaining service.
1.1.5 Do not dis-assemble the Inverter/Charger. IT CONTAINS NO USER SERVICEABLE PARTS.
Attempting to service the Inverter/Charger yourself may result in a risk of electrical shock or fire. Internal
capacitors remain charged after all power has been disconnected.
1.1.6 To reduce the risk of electrical shock, disconnect both AC and DC power from the Inverter/Charger
before attempting any maintenance or cleaning. Turning off the inverter power switch will not reduce this
risk.
CAUTION: Equipment damage
The output side of the inverter’s AC wiring should at no time be connected to public power or a generator.
This condition is far worse than a short circuit. If the unit survives this condition, it will shut down until
corrections are made.
Installation should ensure that the inverter’s AC output is, at no time, connected to its AC input.
WARNING:LIMITATIONS ON USE
PLEASE NOTE THAT THE INVERTER/CHARGER SHOULD NOT BE USED IN CONNECTION

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WITH LIFE SUPPORT SYSTEMS OR OTHER MEDICAL EQUIPMENT OR DEVICES. WE MAKE NO
WARRANTY OR REPRESENTATION IN CONNECTION WITH THEIR PRODUCTS FOR SUCH
USES. USING THE INVERTER/CHARGER WITH THESE PARTICULAR EQUIPMENTS IS AT YOUR
OWN RISK.
1.2 Precautions When Working with Batteries
1.2.1 If battery acid contacts skin or clothing, wash immediately with soap and water. If acid enters eye,
immediately flood eye with running cold water for at least 20 minutes and seek medical attention
immediately.
1.2.2 Never smoke or allow an open spark or flame in the vicinity of battery or engine. When batteries are
being recharged, they generate hydrogen gas that is explosive in certain concentrations in air (explosive
limits are 4.1 to 72 percent hydrogen in air). The ventilation system can exchange an adequate amount of
fresh air for the number of batteries being charged. This is essential to prevent an explosion.
1.2.3 Do not allow metal objects to contact the battery terminals. The resulting spark or short-circuit on the
battery of other electrical part may cause an explosion.
1.2.4. Remove personal metal items such as rings, bracelets, necklaces, and watches when working with a
lead-acid battery. A lead-acid battery produces a short-circuit current high enough to weld a ring or the like
to metal, causing a severe burn.
1.2.5 To reduce the risk of injury, charge only rechargeable batteries suitable for use by this inverter such as
deep-cycle lead acid, lead antimony, lead calcium gel cell, absorbed mat, NiCad/NiFe or Lithium battery.
Other types of batteries may burst, causing personal injury and damage. NEVER charge a frozen battery.
See battery type of this manual for more information about acceptable battery types and program settings.
1.2.6 Don’t install the inverter near batteries, the inverter may heat battery electrolyte and cause corrosive
fumes to vent and damage/corrode nearby electronics or metals.
1.3 Target Group
This document is intended for qualified persons and end users. Tasks that do not require any particular
qualification can also be performed by end users. Qualified persons must have the following skills:
•Knowledge of how an inverter works and is operated
•Training in how to deal with the dangers and risks associated with installing and using electrical
devices and installations
•Training in the installation and commissioning of electrical devices and installations
•Knowledge of the applicable standards and directives
•Knowledge of and compliance with this document and all safety information
2 Introduction
2.1 General Information
Thank you for purchasing the M series Off Grid Solar Inverter/Charger.
The M Series Transformer Based Off Grid Solar Inverter/Charger is a combination of 4 products:
1. Transformer based DC to AC power inverter
2. AC to DC battery charger

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3. MPPT Solar Charger Controller
4. High Speed DC/AC Transfer Switch.
Packed with unique features, it is one of the most technically advanced off grid solar inverters on the market.
Some solar inverters on the market physically include a solar charger which has no communication with the
PCBs of the inverter. The electronically integrated MPPT charge controller we have integrated into this
inverter’s design is also able to harvest the PV production from your panels to charge the batteries even
when the inverter is powered off.
The inverter’s powerful DSP(digital signal processor ) makes the M series solar inverters very versatile and
almost all of its specifications can be adjusted via its LCD, such as AC output voltage, frequency, power
priority, low/high battery cutoff, charging profiles & amperage, etc.
•It outputs two hot lines of 120/240vac simultaneously, between each hotline and neutral, it is 120Vac,
between two hotlines, it is 240Vac. You can get the full power on 240Vac and half power on each of
the hotlines.
•It supports different types of remote monitoring with Remote LCD Panel (Sold separately), Wi-Fi or
GPRS module or computer.
•The BMS port communicates with lithium battery for optimal operation of batteries.
•It also has a programmable “US2” setting which works with lithium batteries without BMS
communication with the inverter.
•The 300% surge capacity of 5 seconds makes it possible to support demanding inductive loads.
•The M Series models are available in 230Vac (single phase) and 120/240Vac(split phase), together
with a manual 50Hz/60Hz frequency switch, the product line is compatible with all the major utility
standards worldwide.
Thus the M Series Pure Sine Wave Inverter/Charger is suitable for a myriad of applications including
renewable energy systems, utility, truck, RV and emergency vehicles etc.
To get the most out of the power inverter, it must be installed, used and maintained properly. Please read the
instructions in this manual before installing and operating.
2.2 Mechanical Drawing

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1. ON/OFF Power Switch
2. LCD Display
3. Status Indicator
4. Charging Indicator
5. Fault Indicator
6. Function Buttons

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7. Negative Battery Terminal
8. Positive Battery Terminal
9. Dry Contact For AGS
10. RS485/Remote Panel Port
11. AC Input Breaker
12. AC Output Breaker
13. PV Input Terminal
14. AC Output Terminal
15. AC Input Terminal
16. BMS Port
17. Wi-Fi/GPRS Remote Module Port
18.USB Port (Connects To Computer)
19. DC Fan
20. Grounding Terminal
2.3 Features
*Automatic Solar Charging When the Inverter is Powered Off
*Auto Generator Start
*Smart remote monitor with Wi-Fi or GPRS Module
*Manual 50Hz/60Hz output frequency switch for worldwide operation
*Maximum THD: 3% at nominal battery voltage
*Powerful 4-stage power factor corrected battery charger up to 100 Amps, settable from 0%-100%
*High surge output capability, 300% peak load for 5 seconds
*Ultra low quiescent current, low power ‘Power Saver Mode’ to conserve energy
*Equilization Charging
*10 ms transfer time fromAC to battery for the continuous load operation
*Thermally controlled variable speed fan for more efficient cooling
*Extensive protections against various harsh situations
*Solar Priority or SBU developed for renewable energy systems
2.4 Electrical Performance
2.4.1 Invert
Topology
The M Series pure sine wave inverter/charger is built according to the following topology.
⚫Invert: Full Bridge Topology.
⚫Charge: Isolated Boost Topology
When operating in invert mode, the direct current (DC) that enters the inverter from the batteries is filtered
by a large input capacitor and switched “On” and “Off” by the Metal Oxide Silicon Field Effect Transistors
(MOSFET) at a rate of 50 Hz or 60Hz and directed into the transformer which steps the voltage up to 230 or
120 volts. The unit has a powerful microprocessor to control the output voltage and frequency as the DC
input voltage and/or output load varies.
Because of high efficiency MOSFETs and the heavy transformers, it outputs PURE SINE WAVE AC with
an average THD of 7% (min 3%, max 10% under full linear loads) depending on the load connected and
battery voltage.
The peak invert efficiency of M Series is 85%.
The inverter must be connected to batteries to power on.
Overload Capacity
1 For 100%<Load<120%, Fault (Power off) after 10 seconds.
2 For 120%<Load≤300%, Fault (Power off) after the 5 seconds.
Soft Start in Inverter Mode

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When the inverter is turned on, the output voltage gradually ramps up from 0VAC to rated voltage in about
1.2 sec. This effectively reduces otherwise very high starting inrush current drawn by AC loads such as
Switched Mode Power Supplies and inductive loads. This will result in lower motor inrush current, which
means less impact on the loads and inverter.
Caution:
After the inverter is switched on, it takes a finite amount of time to self-diagnose and get ready to deliver
full power. Always switch on the load(s) after a few seconds of switching on the inverter. Avoid switching
on the inverter with the load already switched on. This may prematurely trigger the overload protection.
When a load is switched on, it may require an initial higher power surge to start. If multiple loads are being
powered, they should be switched on individually so that the inverter is not overloaded by the higher starting
surge.
2.4.2 AC & MPPT Charger
The M Series pure sine wave inverter/charger is equipped with an active PFC (Power Factor Corrected)
multistage battery charger. The PFC feature controls the amount of power used to charge the batteries in
order to obtain a power factor as close as possible to 1.
Unlike other inverters whose max charging current decreases according to the input AC voltage, the M
Series pure sine wave inverter/charger is able to output maximum charging current as long as input AC
voltage is in the range of 154~260VAC, and AC frequency is in the range of 48-54Hz(58-64Hz for 60Hz
model).
The M Series pure sine wave inverter/charger has a very rapid charge current available, and the max charge
current can be adjusted from zero to 100% in small increments on the inverter’s LCD. This is helpful if this
powerful charger applies charging to a small capacity battery bank.
There are three main charging stages:
Bulk Charging: This is the initial stage of charging. While Bulk Charging, the charger supplies the battery
with controlled constant current. The charger will remain in Bulk charge until the Absorption charge voltage
(determined by the Battery Type selection) is achieved.
A software timer will measure the time from charger start until the battery charger reaches 0.3V below the
boost voltage, then take this time as T0 and T0×10 = T1.
Absorb Charging: This is the second charging stage and begins after the absorb voltage has been reached.
Absorb Charging provides the batteries with a constant voltage and reduces the DC charging current in order
to maintain the absorb voltage setting.
In this period, the inverter will start a T1 timer; and the charger will keep the boost voltage in Boost CV
mode until the T1 timer has expired. The voltage will then be reduced to the float voltage setting. The timer
has a minimum setting of 1 hour and a maximum setting of 12 hours. When charging current falls below
0.01C, the charger will switch to the float charge.
Float Charging: The third charging stage occurs at the end of the Absorb Charging time. While Float
charging, the charge voltage is reduced to the float charge voltage (determined by the Battery Type
selection*). In this stage, the batteries are kept fully charged and ready if needed by the inverter.
If the battery type is selected as “lithium battery”, our charger will drastically reduce the charging current to
zero once float voltage is reached.

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When the AC power charging process starts, the charging current will each peak in around 3 seconds, the
charger may overload the AC input generator and drop its output frequency, making inverter switch to
battery mode.
It is suggested to gradually put charging load on the generator by switching the charging switch from
minimum to maximum, and give the generator enough time to spin up.
Caution:
To guarantee the best performance of the AC charger when theAC input is from a
generator, the standby generator should be rated at least 150% higher capacity than
the inverter.
Warning! Operation with an under-rated generator or generator with unqualified
wave form may cause premature failure which is not under warranty.
Battery Equalization
The equalization function has been added into the M series inverter charge controller. It reverses the buildup
of negative chemical effects like stratification, a condition where acid concentration is greater at the bottom
of the battery than at the top. Equalization also helps to remove sulfate crystals that might have built up on
the plates. If left unchecked, this condition, called sulfation, and will reduce the overall capacity of the
battery. Therefore, it’s recommended to equalize battery periodically.
How to Apply Equalization Function
You must enable battery equalization function in monitoring LCD setting program 43 first. Then, you may
apply this function in device by either one of following methods:
1. Setting equalization interval in program 47.
2. Active equalization immediately in program 48.
When to Equalize
In float stage, when the equalization interval setting (battery equalization cycle) has arrived, or equalization
is active immediately, the controller will start to enter the Equalize stage.

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Equalize charging time and timeout
In the Equalize stage, the controller will supply power to charge the battery as much as possible until the
battery voltage raises to battery equalization voltage. Constant-voltage regulation is then applied to maintain
battery voltage at the battery equalization voltage. The battery will remain in the Equalize stage until the set
battery equalization time has come.
However, in the Equalize stage, when battery equalization time has expired and battery voltage has not risen
to the battery equalization voltage point, the charge controller will extend the battery equalization time until
the battery voltage achieves battery equalization voltage. If the battery voltage is still lower than battery
equalization voltage when battery equalization timeout setting has been reached, the charge controller will
stop equalization and return to float stage.
The M Series pure sine wave inverter/charger is built with MPPT solar charging modules up to 120A.
Model #
AC Charging Current
MPPT Solar Charger
Max Charging Current
M6048D
60A
80A
140A
M12048D
100A
2*60A=120A
180A
Note: The M12048D is built with two separate 60A MPPT controllers, each one capable of handling
different voltages and amperages from different PV arrays.
Its max charging current is not the sum of AC charge current and MPPT Charger.
The MPPT Solar Charger will automatically work when the inverter is powered off.
Even when the power switch is in the off position, the built-in solar charger will automatically work when
PV input voltage and battery voltage is in the acceptable range, this is to optimize solar production for
battery charging.
With the power switch is in the off position, the inverter will not convert battery power to AC output.
When the battery is fully charged, the voltage has to drop by 2 volts (or below 98% of SOC when BMS
communication is established) to activate the charger.
2.4.3 DC&AC Transfer

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In the Standby Mode, the AC input of the inverter is continuously being monitored. Whenever AC power
falls out of the programmed trip voltages, the inverter will automatically transfer back to Invert Mode with
minimum interruption to your appliances.
The Inverter / Standby mode transfer delay is between 6 milliseconds and 10 milliseconds.
Though this inverter is not designed as a computer UPS system, the transfer time is fast enough to keep most
computers operational, devices like computers can generally tolerate a max power loss for 20ms.
2.4.4 Power Saver
There are two working statuses for M Series inverters: “Power On” and “Power Off”.
When power switch is in the “Unit Off” position, the inverter is powered off.
When power switch is turned to either “Power Saver Auto” or “Power Saver Off”, the inverter is powered
on.
The “Power Saver”function is dedicated to conserve battery power when AC power demand is either
minimal or not required at all by the loads.
In this mode, the inverter pulses the AC output looking for an AC load (i.e., electrical appliance). Whenever
an AC load (greater than 500 watts at 120Vac) is turned on, the inverter recognizes the need for power and
automatically starts inverting and output goes to full voltage. When there is no load (or less than 500 watts)
detected, the inverter automatically goes back into search mode to minimize energy consumption from the
battery bank.
In “Power saver on” mode, the inverter will draw power mainly in sensing moments, thus the idle
consumption is significantly reduced.
Power Saver On
Power Saver Off
Power Saver On (Load detected)
Note: The minimum power of a load to take inverter out of sleep mode (Power Saver On) is 500 Watts
on each hot line. There is load detection on each of the hot lines.
When the inverter is in idle, even there is AC input power, the inverter will discharge the battery as
the LCD, relay, fans are powered by DC.
M Series Inverter/Charger Idle Power Consumption(in Watts)
Model
Idle(Max)
3Secs(Max)
M6048D
100W
25.0W
M12048D
120W
40.0W
For more detailed technical information, please contact us.
In the “search sense”mode, the LED will blink and the inverter will make a ticking sound. At full output
voltage, the inverter will make a steady humming sound. When the inverter is used as an “uninterruptible”
power supply the search sense mode function should be defeated.
Exceptions

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Some devices, when scanned by the load sensor, cannot be detected. Small fluorescent lights are the most
common example. (Try altering the plug polarity by turning the plug over.) Some computers and
sophisticated electronics have power supplies that do not present a load until line voltage is available. When
this occurs, each unit waits for the other to begin. To drive these loads, either a small companion load must
be used to bring the inverter out of its search mode, or the inverter may be programmed to remain operating
at full output voltage.
2.4.5 Protections
The M Series inverter/charger is equipped with extensive protections against various harsh situations/faults.
These protections include:
⚫AC Input over voltage protection/AC Input low voltage protection
⚫Low battery alarm/High battery alarm
⚫Over temperature protection/Over load protection
⚫Short Circuit protection (fault after 1s)
When Over temperature /Overload occurs, after the fault is cleared, the master switch has to be reset to
restart the inverter. The inverter will go to over temp protection when the heat sink temp is over 90ºC(194℉)
and will go to Fault (shutdown output) after 30 seconds. After temp drops to 45ºC(113℉), the switch has to
be reset to activate the inverter.
Whenever it triggers protection mode and the fault is cleared, the inverter must be reset to resume work.
2.4.6 Remote Monitoring
The M series inverter can be remotely monitored and controlled.
It supports 4 types of remote monitoring:
1. Plug in the remote LCD panel to the RS485 port. (Applied to ones produced after 2021 May).
2. Connect to a computer via the USB port and monitor the inverter on the software.
3. Plug a Wi-Fi or GPRS module into Wi-Fi port, and monitor it on a computer or cellphone APP.
4. Connect to the RS485 port, it allows users to monitor on their own software programmed with the same
protocol.
To monitor the inverter on a computer, please download the software (SG Solar Power Monitor) from our
website in the Support>Software Download section.
If an extra LCD switch panel is connected to the inverter via “RS485” port, together with the power switch
on the inverter top cover, the two panels will be connected and operated in parallel.
Whichever first switches from “Off” to “On”, it will power the inverter on.
Only when both panels are turned to “Unit Off” position, will the inverter be powered off.
In order for the remote LCD panel to take full control, the inverter box power switch must be in “Off”
position.
⚫The suggested length between the LCD switch panel and inverter is 20 meters.
⚫The LCD panel allows users to customize the inverter spec on it.

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Warning:
Our cables are designed with special pinouts on the connectors, so don’t use other cables, or the
remote LCD panel will not be powered on.
Never cut the communication cable when it is attached to inverter with battery connected. Doing this,
even when the inverter is powered off, it will damage the remote PCB inside if the cable is short
circuited during cutting.
The M series inverters can be remotely monitored by a Wi-Fi or GPRS module plugged into its USB port.
The Wi-Fi / GPRS module is a plug-and-play monitoring device which allows users to monitor the status of
the PV system from a mobile phone APP or from the website
anytime anywhere.
The inverter’s AC output power can be powered on and off via the
APP.
The PV Butler APP will automatically refresh the data in every 5
minutes. To access real date, please roll down the screen to refresh.
To monitor the inverter via both WIFI and USB port, the
CUBEWiFi module can be connected via a short extension cable.
2.4.7 LCD & Specification Setup
Press the On/Off switch to turn on the unit.
The operation and display panel area includes three LED indicators,
four function keys and a LCD display.
It shows very rich operating info.
1 LCD display / 2 Status indicator / 3 Charging indicator 4
Fault indicator
5 Function buttons
LED Indicator
Operation Status
Green
Solid On
Output is powered by utility in AC mode.

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Flashing
Output is powered by battery or PV in battery mode.
Green
Solid On
Battery is fully charged.
Flashing
Battery is being charged.
Red
Solid On
Fault occurs.
Flashing
Warning condition occurs.
Button
Description
ESC
Exit setting mode
UP
Go to previous selection
DOWN
Go to next selection
ENTER
Enter setting mode or
confirm the selection in
setting mode.
Icon
Function Description
Input Information
Indicates the AC input.
Indicates the PV input
Indicate input AC voltage, input frequency, PV voltage, battery voltage and charger
current.
Configuration Program and Fault Information
Indicates the setting programs.
Indicates the warning and fault conditions.
Warning Code: Flashing. Error Code: Constantly On.
Output Information
Indicate output voltage, output frequency, load percent, load in VA, load in Watt and
discharging current.
Battery Information
Indicates battery level by 0-24%, 25-49%, 50-74% and 75-100% in battery mode and
charging status in line mode.
These two symbols indicate the charge priority. SOLAR indicates solar first. UTILITY
indicates utility priority. SOLAR blinking indicates solar only; SOLAR and UTILITY
both on indicates combined charging.

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CC&CV Charge Mode
Battery Voltage @
Load >50%
Battery Voltage @50%>
Load > 20%
Battery Voltage @
Load < 20%
LCD Display
<48V
< 41.2V
< 43.6V
<44.8V
48-50V
41.2-43.2V
43.6-45.6V
44.8-46.8V
50-52V
43.2-45.2V
45.6-47.6V
46.8-48.8V
>52V
> 45.2V
> 47.6V
>48.8V
Load Information
Indicates overload.
Indicates the load level by 0-24%, 25-49%, 50-74% and 75-100%.
0%~24%
25%~49%
50%~74%
75%~100%
Mode Operation Information
Indicates AC input is available.
Indicates PV Input is available.
Indicates load is supplied by AC power.
Indicates the AC to DC charging.
Indicates the DC to AC conversion.
These three signs indicate theAC output priority. SOL.FIRST indicates solar
Priority. BAT.FIRST indicates battery priority. UTI.FIRST indicates utility
priority.
Mute Operation
Indicates unit audible alarm is disabled.
LCD SETTING
The M series inverter LCD allows users to virtually change all of its specs. It will enter setting mode if the
ENTER button is held for over 3 seconds. Press “UP” or “DOWN” button to select setting programs, and
then press the “ENTER” button to confirm the selection or the ESC button to exit.
Program 01: Power Priority for AC Loads
01 UEI: Utility Priority (Default)
In this mode, the utility will provide power to the AC loads as the first power source.
Solar and battery energy will provide power to the loads only when utility power is not available.

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This mode works for applications with cheap utility power or using battery in power outages.
01 SOL: Solar Priority
In this mode, the solar energy provides power to the loads as the first power source.
If solar energy is insufficient, battery energy will be consumed.
Utility power will engage when one of below conditions happens:
1 Solar energy is not available (No PV production).
2 Battery voltage drops to either low-level warning voltage or the setting point in program 12 (DC to AC
Transfer Voltage in “SOL Priority”).
Once the solar power is lost, the utility will have higher priority than battery. This mode can be regarded as
“SUB”(Solar>Utility>Battery).
In this mode, the inverter will transfer between DC and AC as per the settings of program 12 and 13. Users
can set it to utility priority to stop the cycling.
01 SbU: SBU Priority
As indicated by the abbreviation, the power priority comes as solar>battery>utility.
Solar energy provides power as first priority.
If solar energy is insufficient, battery energy will be consumed.
Utility provides power to the loads only when battery voltage drops to either low-level warning voltage or
the setting point in program 12(DC to AC Transfer Voltage in “SBU Priority”).
When solar is gone in SBU mode, the power priority becomes battery>utility, battery priority is higher than
utility priority.
In this mode, the inverter will transfer between DC and AC as per the settings of program 12 and 13. Users
can set it to utility priority to stop the cycling.
Note: When the inverter power priority mode is changed between the three different modes, the
setting of other programs will be saved with the associated power priority mode.
Program 02: Maximum Charging Current
6KW model: default 80A, 10A~140A Settable
12KW model: default 80A, 10A~180A Settable
(Note: the max charging current is not the simple sum up of utility charging current + solar charging current
for M12048D)
The MPPT charger will stop when charging is completed. To activate the charger, the battery voltage must
drop at least 2 voltages below the lower value in program 19 and 20.
Program 03: AC Input Voltage Range
The AC Input voltage range in program 03 means the acceptable AC input voltage for load bypassing, it is
wider than the “utility charger voltage”
There are two selectable AC input bypass ranges, Appliance Mode and UPS Mode.
The Appliance Mode will give the appliance the maximum amount of power by accepting a wider range of
voltage than UPS Mode.
AC Input Bypass Voltage
Utility Charger Voltage
AC Input Frequency
Appliance Mode
154~272Vac±5V
164~262Vac±5V(Recover)
154V-260Vac
164V-250Vac(Recovery)
45-65Hz
47-63Hz(Recovery)
UPS Mode
184~272Vac±5V
194~262Vac±5V(Recover)
184V-260Vac
194-250Vac(Recovery)
45-65Hz
47-63Hz(Recovery)

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Program 05: Battery Type
05: AGN
AGM Battery (Default): CV :56.4V, Float 54V
05: FLd
Flood Battery: CV :58.4V, Float 56V
05: USE
User-Defined
If “User-Defined” is selected, battery charge voltage and low DC cut-off voltage can be set up in program
19, 20 and 21. This setting works for GEL batteries etc.
05: US2
User-Defined 2
This US2 setting is designed for the inverter to work with lithium battery without communication via BMS.
As floating charging is not required for lithium batteries, in US2 mode, the program 19&20 will be
interlocked and set to the same value whenever one of them is changed.
Compared with USE, the charger in US2 will immediately reduce charging current when the preset voltage
in 19 is reached.
NOTE: The US2 will not optimally charge the lithium battery due to the lack of BMS communication. The
battery capacity icon bar doesn’t reflect the actual battery capacity; it is converted from battery voltage. For
more details, please refer to page 13.
When the inverter is in US2, it could not correctly display the accurate SOC of the lithium batteries.
The displayed SOC is converted from battery voltage. The SOC will change only when the battery voltage
changes are big enough.
Due to the ripple current from the utility charger, when “US2”is set for charging lithium batteries, it is
recommended to set the max utility charging current at 30% of the nominal charge current.
05: LI
Lithium
This setting only works when inverter communicates with lithium battery BMS built with the same protocol.
The program is set to “LI”, the LCD will show a hidden program of 36 about BMS protocol types.
There are many lithium battery BMS communication protocols, L01, L02 to L99.
For Sigineer Power LFP power walls, the protocol is L01.
When the battery type set as “LI”, the maximum charge current can be modified by the user.
Note: When the communication fails, the inverter will cut off output.
RS485 communication protocol is L01 to L50.
The CAN communication protocol is L51 to L99.
Program 06: Automatic Overload Restart
06: LFd
Disabled.
06: LFE
When this feature is enabled, the M6KW/M12KW inverter will attempt restart 3 times, if it still fails to start
the load, it will shut off.

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Program 08: AC Output Voltage
The AC output voltage between two hot lines (or hot and neutral for single phase models) can be set to
208V, 220V, 230V and 240V.
Accordingly, the voltage between each hotline and neutral is 104V, 110V, 115V and 120V.
Program 09: AC Output Frequency
The AC Output Frequency can be set to 50Hz or 60Hz.
Program 11: Maximum Utility Charge Current
Model #
Default Value
Resettable Range
M6048D
30A
10-60A
M12048D
30A
10-100A
If Li is selected in program 5, this program can’t be manually set up.
The solar charger has higher priority than the utility charger, if the max charging current and utility charger
is set to the same value, the solar charger will still work.
If setting value in Program 02(Total Charge Current) is smaller than that in Program 11(Utility Charge
Current), the final charging current is set according to Program 02 for utility charger.
No matter the AC output frequency is set to 50Hz or 60Hz, the acceptable AC input frequency for the utility
charger is 45-65Hz.
If the AC input frequency drops out of the 45-65Hz range, the inverter will transfer to battery. The AC input
has to return to 47-63Hz to activate the utility charger.
Program 12: DC to AC Transfer Voltage
The setting works when program 01 is in “SBU Priority” or “Solar Priority” Mode.
Model #
Default Value
Resettable Range
6KW 12KW
46V/40%
44V~56V/5%-50%
The battery SOC will be displayed when BMS communication is established.
Program 13: AC to DC Transfer Voltage
The setting works when program 01 is in “SBU Priority” or “Solar Priority” Mode.
Model #
Default Value
Resettable Range
6KW 12KW
54V/80%
44V~58V/60%-100%
The battery SOC will be displayed when BMS communication is established.
Program 14: Charger Power Source Priority
14:CSO
Solar Priority
⚫Solar energy will charge battery as the priority.
⚫Utility will charge battery only when solar energy is not available (lost).
14:CUt
Utility Priority
⚫Utility will charge battery as priority.
⚫Solar energy will charge battery only when utility power is not available (lost).
14:SNU

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Solar and Utility (Default)
⚫Solar energy and utility will both charge battery. But the solar will have higher priority in charging.
14:OSO
Solar Only
⚫Solar energy will be the only charger source no matter utility is available or not.
⚫When the battery voltage drops below the setting of 21(Low DC Cut-off Voltage), the utility power will
be used to force a charging cycle to avoid battery overdischarging.
⚫If this off grid solar inverter is working in DC to AC invert mode, only solar energy can charge the
battery. Solar energy will charge battery if it's available and sufficient.
Program 15: Alarm On/Off Control
Program 16: Backlight On/Off Control
When off is set, the LCD will go dim after 60 seconds left unattended.
Program 17: Beeps once between AC and DC Transfer
Program 19: C.V. Charging Voltage
48V model: default 56.4V, 48.0V~58.4V Settable
⚫If user-defined setting (USE/US2) is selected in program 5, this program can be set up
Program 20: Float Charging Voltage
48V model: default 54.0V, 48.0V~58.4V Settable
⚫If user-defined setting (USE/US2) is selected in program 5, this program can be set up
Program 21: Low Battery Cut-Off Voltage
48V model: default 42.0V/20%, 36.0V~52.0V/5%-50% Settable.
⚫The battery SOC will be displayed when BMS communication is established.
⚫If user-defined setting (USE/US2) is selected in program 5, this program can be set up
⚫After User-defined (USE/US2) setting is selected in program 5, this program can be set up
⚫Low DC cut-off voltage will be fixed to setting value regardless of load percentage.
When low DC Cut-Off voltage is reached:
⚫If battery is the only power source, inverter will shut down.
⚫If PV energy and battery power are available, inverter will charge battery without AC output.
⚫If PV energy, battery power and utility are all available, inverter will transfer to line mode and provide
output power to loads and charge the battery at the same time.
When low battery voltage protection occurs and qualified PV or AC power inputs, the inverter will
automatically charge and invert DC to AC when the battery voltage is 2Vdc higher than low battery cut off
(Or 10% more SOC than low battery cut off in Lithium mode).
To make it work, the power switch must remain in the original “ON”position.
The minimal voltage for the LCD to illuminate is 30Vdc for 48V models.
For the M6048D and M12048D inverter, the High DC Cut-Off Voltage varies for different type of batteries.
It is 60V for AGM battery, 62V for flood battery, 4 volts higher than the CV voltage in USE or Li Mode.
The inverter will go to high voltage alarm when the battery voltage is reached and go to Fault After 60
seconds.

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Note: When the Program 12: DC to AC Transfer Voltage value is set, the Program 21: Low Battery Cut-Off
Voltage value must be lower than that.
Program 22: RS485 Communication Address
Default 001. 001-255. Settable. It is for external solar charger expansion.
Program 23: Battery Equalization
If “Flooded” or “User-Defined” is selected in program 05, this program can be set up. The Equalization is
not available for AGM batteries.
Program 24: Battery Equalization Voltage
Model #
Default Value
Resettable Range
6KW 12KW
58.4V
48-58.4V
Program 25: Battery Equalized Time
Default 60min, 5min~900min Settable
Program 26: Battery Equalized Timeout
Default 120min, 5min~900min Settable
Program 27: Equalization Interval
Default 30days, 1 day~90 days Settable
Program 28: Equalization Activated Immediately
If equalization function is enabled in program 23, this program can be set up. If “Enable” is selected in this
program, it will activate battery equalization immediately and LCD main page will shows “Eq”.If “Disable”
is selected, it will cancel equalization function until next activated equalization time arrives based on
program 27 setting. At this time, “Eq” will not be shown in LCD main page
Program #
Description
ICON
01 Power Priority for AC
Loads
Utility Priority
01 Power Priority for AC
Loads
Solar Priority
01 Power Priority for AC
Loads
SBU Priority
02 Maximum Charging
Current
Max PV+Utility Charging Current
03 AC Input Voltage
Range
Appliance Mode (default)
03 AC Input Voltage
Range
UPS Mode