MasterPower MasterPower 3.6KW User manual

Version: 1.0
3.6KW/5.6KW
SOLAR INVERTER / CHARGER
User Manual

Table of Contents
ABOUT THIS MANUAL ......................................................................................................................................1
Purpose............................................................................................................................................................1
Scope ...............................................................................................................................................................1
SAFETY INSTRUCTIONS...................................................................................................................................1
INTRODUCTION .................................................................................................................................................2
Features...........................................................................................................................................................2
Basic System Architecture ...............................................................................................................................2
Product Overview.............................................................................................................................................3
Unpacking and Inspection ...............................................................................................................................4
Preparation ......................................................................................................................................................4
Mounting the Unit.............................................................................................................................................4
Battery Connection ..........................................................................................................................................5
AC Input/Output Connection............................................................................................................................6
PV Connection .................................................................................................................................................7
Final Assembly.................................................................................................................................................9
Communication Connection.............................................................................................................................9
Dry Contact Signal .........................................................................................................................................10
OPERATION......................................................................................................................................................11
Power ON/OFF ..............................................................................................................................................11
Operation and Display Panel .........................................................................................................................11
LCD Display Icons .........................................................................................................................................12
LCD Setting....................................................................................................................................................15
LCD Display ...................................................................................................................................................31
Operating Mode Description ..........................................................................................................................36
Faults Reference Code ..................................................................................................................................40
Warning Indicator ...........................................................................................................................................41
CLEARANCE AND MAINTENANCE FOR ANTI-DUST KIT............................................................................42
Overview ........................................................................................................................................................42
Clearance and Maintenance..........................................................................................................................42
BATTERY EQUALIZATION ..............................................................................................................................43
SPECIFICATIONS.............................................................................................................................................44
Table 1 Line Mode Specifications ...................................................................................................................44
Table 2 Inverter Mode Specifications .............................................................................................................45
Table 3 Charge Mode Specifications...............................................................................................................46
Table 4 General Specifications........................................................................................................................46
TROUBLE SHOOTING .....................................................................................................................................47
Appendix I: BMS Communication Installation..............................................................................................48
Appendix II: The Wi-Fi Operation Guide........................................................................................................55

1
ABOUT THIS MANUAL
Purpose
This manual describes the assembly, installation, operation and troubleshooting of this unit. Please read
this manual carefully before installations and operations. Keep this manual for future reference.
Scope
This manual provides safety and installation guidelines as well as information on tools and wiring.
SAFETY INSTRUCTIONS
WARNING: This chapter contains important safety and operating instructions. Read and keep
this manual for future reference.
1. Before using the unit, read all instructions and cautionary markings on the unit, the batteries and all
appropriate sections of this manual.
2. CAUTION –To reduce risk of injury, charge only deep-cycle lead acid type rechargeable batteries.
Other types of batteries may burst, causing personal injury and damage.
3. Do not disassemble the unit. Take it to a qualified service center when service or repair is required.
Incorrect re-assembly may result in a risk of electric shock or fire.
4. To reduce risk of electric shock, disconnect all wirings before attempting any maintenance or cleaning.
Turning off the unit will not reduce this risk.
5. CAUTION –Only qualified personnel can install this device with battery.
6. NEVER charge a frozen battery.
7. For optimum operation of this inverter/charger, please follow required spec to select appropriate cable
size. It’s very important to correctly operate this inverter/charger.
8. Be very cautious when working with metal tools on or around batteries. A potential risk exists to drop
a tool to spark or short circuit batteries or other electrical parts and could cause an explosion.
9. Please strictly follow installation procedure when you want to disconnect AC or DC terminals. Please
refer to INSTALLATION section of this manual for the details.
10. Fuses are provided as over-current protection for the battery supply.
11. GROUNDING INSTRUCTIONS -This inverter/charger should be connected to a permanent grounded
wiring system. Be sure to comply with local requirements and regulation to install this inverter.
12. NEVER cause AC output and DC input short circuited. Do NOT connect to the mains when DC input
short circuits.
13. Warning!! Only qualified service persons are able to service this device. If errors still persist after
following troubleshooting table, please send this inverter/charger back to local dealer or service
center for maintenance.
14. WARNING: Because this inverter is non-isolated, only three types of PV modules are acceptable:
single crystalline, poly crystalline with class A-rated and CIGS modules. To avoid any malfunction, do
not connect any PV modules with possible current leakage to the inverter. For example, grounded PV
modules will cause current leakage to the inverter. When using CIGS modules, please be sure NO
grounding.
15. CAUTION: It’s required to use PV junction box with surge protection. Otherwise, it will cause
damage on inverter when lightning occurs on PV modules.

2
INTRODUCTION
This is a multi-function inverter, combining functions of inverter, solar charger and battery charger to offer
uninterruptible power support in a single package. The comprehensive LCD display offers user-configurable
and easy-accessible button operations such as battery charging current, AC or solar charging priority, and
acceptable input voltage based on different applications.
Features
Pure sine wave inverter
Customizable status LED ring with RGB lights
Touchable button with 4.3” colored LCD
Built-in Wi-Fi for mobile monitoring (APP is required)
Supports USB On-the-Go function
Built-in anti-dusk kit
Reserved communication ports for BMS (RS485, CAN-BUS, RS232)
Configurable input voltage ranges for home appliances and personal computers via LCD control panel
Configurable output usage timer and prioritization
Configurable charger source priority via LCD control panel
Configurable battery charging current based on applications via LCD control panel
Compatible to utility mains or generator power
Basic System Architecture
The following illustration shows basic application for this unit. It also required the following devices to have a
complete running system:
Generator or Utility mains.
PV modules
Consult with your system integrator for other possible system architectures depending on your requirements.
This inverter can power various appliances in home or office environment, including motor-type appliances
such as tube light, fan, refrigerator and air conditioners.
Figure 1 Basic hybrid PV System Overview

3
Product Overview
1. LCD display
2. RGB LED bar (refer to LCD Setting section for the details)
3. Touchable function keys
4. Power on/off switch
5. AC input connectors
6. AC output connectors (Load connection)
7. Battery connectors
8. PV connectors
9. Circuit breaker
10. Dry contact
11. USB port as USB communication port and USB function port
12. RS-232 communication port
13. BMS communication port: CAN, RS-485 or RS-232

4
INSTALLATION
Unpacking and Inspection
Before installation, please inspect the unit. Be sure that nothing inside the package is damaged. You should
have received the following items inside of package:
Inverter unit Manual software CD RS-232 cable DC Fuse
Preparation
Before connecting all wirings, please take off bottom cover by removing two screws. When removing the
bottom cover, be carefully to remove one cable as shown below.
Mounting the Unit
Consider the followings before selecting your placements:
Do not mount the inverter on flammable construction
materials.
Mount on a solid surface
Install the inverter at eye level in order to allow easy
LCD display readout.
For proper air circulation and heat dissipation, allow a
clearance of approx. 20 cm to the side and approx. 50
cm above and below the unit.
The ambient temperature should be between 0°C and
55°C to ensure optimal operation.
The recommended orientation is to adhered to the
wall vertically.
Be sure to keep other objects and surfaces as shown
in the diagram to guarantee sufficient heat dissipation
and to have enough space for wirings.
SUITABLE FOR MOUNTING ON CONCRETE OR
OTHER NON-COMBUSTIBLE SURFACE ONLY.

5
Install the unit by screwing three screws. It’s recommended to use M4 or M5 screws.
Battery Connection
CAUTION: For safety operation and regulation compliance, it’s requested to install a separate DC over-current
protector or disconnection device between battery and the inverter. It may not be necessary to have a
disconnection device in some applications, however, it’s still recommended to have over-current protection
installed. Please refer to typical amperage as required.
WARNING! All wiring must be performed by a qualified personnel.
WARNING! It’s very important for system safety and efficient operation to use
appropriate cable for battery connection. To reduce risk of injury, please use the
proper recommended cable and terminal size as below.
Recommended battery cable and terminal size:
Model
Typical
Amperage
Wire Size
Cable
mm2
Ring Terminal
Torque
Value
Dimensions
D (mm)
L (mm)
3.6KW
166.7A
4*4AWG
25
8.4
33.2
5 Nm
5.6KW
129.6A
2*2AWG or 4*4AWG
38 or 25
8.4
39.2 or 33.2
Please follow below steps to implement battery connection:
1. 3.6KW model supports 24VDC system and 5.6KW model supports 48VDC system. Connect all battery packs
as below chart. It is recommend to connect minimum of 100Ah capacity battery for 3.6KW model and
200Ah capacity battery for 5.6KW model.
2. Prepare four battery wires for 3.6KW model and two or four battery wires for 5.6KW model depending on
cable size (refer to recommended cable size table). Apply ring terminals to your battery wires and secure
it to the battery terminal block with the bolts properly tightened. Refer to battery cable size for torque
value. Make sure polarity at both the battery and the inverter is correctly connected and ring terminals are
secured to the battery terminals.
Ring terminal:

6
3.6KW 5.6KW
(using two battery wires)
WARNING: Shock Hazard
Installation must be performed with care due to high battery voltage in series.
CAUTION!! Do not place anything between the flat part of the inverter terminal and the ring
terminal. Otherwise, overheating may occur.
CAUTION!! Do not apply anti-oxidant substance on the terminals before terminals are connected
tightly.
CAUTION!! Before making the final DC connection or closing DC breaker/disconnector, be sure
positive (+) must be connected to positive (+) and negative (-) must be connected to negative
(-).
AC Input/Output Connection
CAUTION!! Before connecting to AC input power source, please install a separate AC breaker between
inverter and AC input power source. This will ensure the inverter can be securely disconnected during
maintenance and fully protected from over current of AC input. The recommended spec of AC breaker is 32A
for 3.6KW and 50A for 5.6KW.
CAUTION!! There are two terminal blocks with “IN” and “OUT” markings. Please do NOT mis-connect input
and output connectors.
WARNING! All wiring must be performed by a qualified personnel.
WARNING! It's very important for system safety and efficient operation to use appropriate cable for AC
input connection. To reduce risk of injury, please use the proper recommended cable size as below.
Suggested cable requirement for AC wires
Model
Gauge
Cable (mm2)
Torque Value
3.6KW
12 AWG
4
1.2 Nm
5.6KW
10 AWG
6
1.2 Nm
Please follow below steps to implement AC input/output connection:
1. Before making AC input/output connection, be sure to open DC protector or disconnector first.
2. Remove insulation sleeves for about 10mm for the five screw terminals.
3. Insert AC input wires according to polarities indicated on terminal block and tighten the terminal screws.
Be sure to connect PE protective conductor ( ) first.
→Ground (yellow-green)
L→LINE (brown or black)
N→Neutral (blue)

7
WARNING:
Be sure that AC power source is disconnected before attempting to hardwire it to the unit.
4. Then, insert AC output wires according to polarities indicated on terminal block and tighten terminal
screws. Be sure to connect PE protective conductor ( ) first.
→Ground (yellow-green)
L→LINE (brown or black)
N→Neutral (blue)
5. Make sure the wires are securely connected.
PV Connection
CAUTION: Before connecting to PV modules, please install separately DC circuit breakers between inverter
and PV modules.
WARNING! It's very important for system safety and efficient operation to use appropriate cable for PV module
connection. To reduce risk of injury, please use the proper recommended cable size shown below.
Model
Wire Size
Cable (mm2)
Torque value（max）
3.6KW/5.6KW
1 x 12AWG
4
1.2 Nm
WARNING: Because this inverter is non-isolated, are accepted: single crystalline, poly crystalline with class A-
rated and CIGS modules. To avoid any malfunctions, do not connect any PV modules with possible current
leakage to the inverter. For example, grounded PV modules will cause current leakage to the inverter. When
using CIGS modules, please be sure NO grounding connection.
CAUTION: It’s requested to use PV junction box with surge protection. Otherwise, it will cause damage on
inverter when lightning occurs on PV modules.
CAUTION: Appliances such as air conditioner requires at least 2~3 minutes to restart because it’s required
to have enough time to balance refrigerant gas inside of circuits. If a power shortage occurs and recovers
in a short time, it will cause damage to your connected appliances. To prevent this kind of damage, please
check manufacturer of air conditioner if it’s equipped with time-delay function before installation. Otherwise,
this inverter/charger will be trigger overload fault and cut off output to protect your appliance but sometimes
it still causes internal damage to the air conditioner.

8
PV Module Selection:
When selecting proper PV modules, please be sure to consider the following parameters:
1. Open circuit Voltage (Voc) of PV modules not to exceeds maximum PV array open circuit voltage of the
inverter.
2. Open circuit Voltage (Voc) of PV modules should be higher than the start-up voltage.
INVERTER MODEL
3.6KW
5.6KW
Max. PV Array Power
4000W
6000W
Max. PV Array Open Circuit Voltage
500Vdc
PV Array MPPT Voltage Range
120Vdc~450Vdc
Start-up Voltage
150Vdc +/- 10Vdc
Take the 250Wp PV module as an example. After considering above two parameters, the recommended module
configurations are listed in the table below.
Solar Panel Spec.
(reference)
- 250Wp
- Vmp: 30.1Vdc
- Imp: 8.3A
- Voc: 37.7Vdc
- Isc: 8.4A
- Cells: 60
SOLAR INPUT
Q'ty of panels
Total input
power
Min in series: 6 pcs, max. in series: 12 pcs.
6 pcs in series
6 pcs
1500W
8 pcs in series
8 pcs
2000W
12 pcs in series
12 pcs
3000W
8 pieces in series and 2 sets in parallel
16 pcs
4000W
10 pieces in series and 2 sets in parallel (only for 5.6KVA
model)
20 pcs
5000W
11 pieces in series and 2 sets in parallel
(only for 5.6KVA model)
22 pcs
5500W
12 pieces in series and 2 sets in parallel
(only for 5.6KVA model)
24 pcs
6000W
PV Module Wire Connection
Please take the following to implement PV module connection:
1. Remove insulation sleeve for about 7 mm on your positive and negative
wires.
2. We recommend using bootlace ferrules on the wires for optimal
performance.
3. Check polarities of wire connections from PV modules to PV input screw
terminals. Connect your wires as illustrated below.
Recommended tool: 4mm blade screwdriver

9
Final Assembly
After connecting all wirings, re-connect one cable and then put bottom cover back by screwing two screws as
shown below.
Communication Connection
Follow below chart to connect all communication wiring.
Serial Connection
Please use the supplied serial cable to connect between the inverter and your PC. Install the monitoring software
from the bundled CD and follow the on-screen instructions to complete your installation. For detailed software
operation, refer to the software user manual on the bundled CD.
Wi-Fi Connection
This unit is equipped with a Wi-Fi transmitter. Wi-Fi transmitter can enable wireless communication between
off-grid inverters and monitoring platform. Users can access and control the monitored inverter with
downloaded APP. You may find “WatchPower” app from the Apple®Store or “WatchPower Wi-Fi” in Google®
Play Store. All data loggers and parameters are saved in iCloud. For quick installation and operation, please
RS-232 communication
to PC
USB communication to
PC
BMS communication

10
refer to Appendix III - The Wi-Fi Operation Guide for details.
BMS Communication Connection
It is recommended to purchase a special communication cable if you are connecting to Lithium-Ion battery
banks. Please refer to Appendix II - BMS Communication Installation for details.
Dry Contact Signal
There is one dry contact (3A/250VAC) available on the rear panel. It could be used to deliver signal to external
device when battery voltage reaches warning level.
Unit Status
Condition
Dry contact port:
NC & C
NO & C
Power Off
Unit is off and no output is powered.
Close
Open
Power On
Output is
powered
from Battery
power or
Solar energy.
Program 01
set as USB
(utility first)
or SUB (solar
first)
Battery voltage < Low DC
warning voltage
Open
Close
Battery voltage > Setting
value in Program 13 or
battery charging reaches
floating stage
Close
Open
Program 01
is set as SBU
(SBU priority)
Battery voltage < Setting
value in Program 12
Open
Close
Battery voltage > Setting
value in Program 13 or
battery charging reaches
floating stage
Close
Open

11
OPERATION
Power ON/OFF
Once the unit has been properly installed and the batteries are connected well, simply press On/Off switch (on
the side of the inverter) to turn on the unit.
Operation and Display Panel
The operation LCD panel, shown in the chart below, includes one RGB LED ring, four touchable function keys
and a LCD display to indicate the operating status and input/output power information.
Touchable Function Keys
Function Key
Description
ESC
To exit the setting
Access USB setting mode
To enter USB setting mode
Up
To last selection
Down
To next selection
Enter
To confirm/enter the selection in setting mode
Touchable
function keys
LCD display
RGB LED ring

12
LCD Display Icons
Icon
Function description
Input Source Information
Indicates the AC input voltage and frequency.
Indicates the PV voltage, current and power.
Indicates the battery voltage, charging stage, configured battery
parameters, charging or discharging current.
Configuration Program and Fault Information
Indicates the setting programs.
Indicates the warning and fault codes.
Warning: flashing with warning code.
Fault: lighting with fault code.
Output Information
Indicate the output voltage, load in VA, and load in Watt and output
frequency.
Battery Information

13
Indicates battery level by 0-24%, 25-49%, 50-74% and 75-100% in
battery mode and charging status in line mode.
When battery is charging, it will present battery charging status.
Status
Battery voltage
LCD Display
Constant
Current mode /
Constant
Voltage mode
<2V/cell
4 bars will flash in turns.
2 ~ 2.083V/cell
The right bar will be on and the other three bars
will flash in turns.
2.083 ~ 2.167V/cell
The right two bars will be on and the other two
bars will flash in turns.
> 2.167 V/cell
The right three bars will be on and the left bar
will flash.
Floating mode. Batteries are fully charged.
4 bars will be on.
In battery mode, it will present battery capacity.
Load Percentage
Battery Voltage
LCD Display
Load >50%
< 1.85V/cell
1.85V/cell ~ 1.933V/cell
1.933V/cell ~ 2.017V/cell
> 2.017V/cell
Load < 50%
< 1.892V/cell
1.892V/cell ~ 1.975V/cell
1.975V/cell ~ 2.058V/cell
> 2.058V/cell
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%
Charger Source Priority Setting Display
Indicates setting program 16 “Charger source priority” is selected as
“Solar first”.
Indicates setting program 16 “Charger source priority” is selected as
“Solar and Utility”.
Indicates setting program 16 “Charger source priority” is selected as
“Solar only”.

14
Output source priority setting display
Indicates setting program 01 “Output source priority” is selected as
“Utility first”.
Indicates setting program 01 “Output source priority” is selected as
“Solar first”.
Indicates setting program 01 “Output source priority” is selected as
“SBU”.
AC Input Voltage Range Setting Display
Indicates setting program 03 is selected as “ ”. The acceptable
AC input voltage range will be within 170-280VAC.
Indicates setting program 03 is selected as “ ”. The acceptable
AC input voltage range will be within 90-280VAC.
Operation Status Information
Indicates unit connects to the mains.
Indicates unit connects to the PV panel.
Indicates battery type.
Indicates parallel operation is working.
Indicates unit alarm is disabled.
Indicates Wi-Fi transmission is working.
Indicates USB disk is connected.

15
LCD Setting
General Setting
After pressing and holding “”button for 3 seconds, the unit will enter the Setup Mode. Press “ ” or “ ”
button to select setting programs. Press “ ” button to confirm you selection or “ ” button to exit.
Setting Programs:
Program
Description
Selectable option
00
Exit setting mode
Escape
01
Output source priority:
To configure load power
source priority
Utility first (default)
Utility will provide power to the
loads as first priority.
Solar and battery energy will
provide power to the loads
only when utility power is not
available.
Solar first
Solar energy provides power to
the loads as first priority.
If solar energy is not sufficient
to power all connected loads,
Utility energy will supply power
to the loads at the same time.
SBU priority
Solar energy provides power to
the loads as first priority.
If solar energy is not sufficient
to power all connected loads,
battery energy will supply
power to the loads at the same
time.
Utility provides power to the
loads only when battery
voltage drops to either low-
level warning voltage or the
setting point in program 12.
02
Maximum charging current:
To configure total charging
current for solar and utility
chargers.
(Max. charging current =
utility charging current +
solar charging current)
60A (default)
Setting range is from 10A to
120A. Increment of each click
is 10A.

16
03
AC input voltage range
Appliances (default)
If selected, acceptable AC
input voltage range will be
within 90-280VAC.
UPS
If selected, acceptable AC
input voltage range will be
within 170-280VAC.
05
Battery type
AGM (default)
Flooded
User-Defined
If “User-Defined” is selected,
battery charge voltage and
low DC cut-off voltage can be
set up in program 26, 27 and
29.
Pylontech battery
If selected, programs of 02,
26, 27 and 29 will be
automatically set up. No need
for further setting.
WECO battery (only for 48V
model)
If selected, programs of 02,
12, 26, 27 and 29 will be
auto-configured per battery
supplier recommended. No
need for further adjustment.

17
05
Battery type
Soltaro battery (only for 48V
model)
If selected, programs of 02,
26, 27 and 29 will be
automatically set up. No need
for further setting.
LIb-protocol compatible battery
Select “LIb” if using Lithium
battery compatible to Lib
protocol. If selected,
programs of 02, 26, 27 and
29 will be automatically set
up. No need for further
setting.
3rd party Lithium battery
If selected, programs of 02,
26, 27 and 29 will be
automatically set up. No need
for further setting. Please
contact the battery supplier
for installation procedure.
06
Auto restart when overload
occurs
Restart disable (default)
Restart enable
07
Auto restart when over
temperature occurs
Restart disable (default)
Restart enable
09
Output frequency
50Hz (default)
60Hz
10
Output voltage
220V
230V (default)

18
240V
11
Maximum utility charging
current
Note: If setting value in
program 02 is smaller than
that in program in 11, the
inverter will apply charging
current from program 02
for utility charger.
30A (default)
Setting range is 2A, then from
10A to 100A. Increment of
each click is 10A.
12
Setting voltage point back
to utility source when
selecting “SBU” (SBU
priority) in program 01.
Available options for 24V model:
23V (default)
Setting range is from 22V to
25.5V. Increment of each click
is 1V.
Available options for 48V model:
46V (default)
Setting range is from 44V to
51V. Increment of each click is
1V.
13
Setting voltage point back
to battery mode when
selecting “SBU” (SBU
priority) in program 01.
Available options for 24V model: Setting range is FUL and from
24V to 29V. Increment of each click is 1V.
Battery fully charged
27V (default)
Available options for 48V model: Setting range is FUL and from
48V to 58V. Increment of each click is 1V.
Battery fully charged
54V (default)