Next Victor NM-II 3.2KW 24V PF1 User manual

3KW/ 5KW
INVERTER / MPPT SCC / AC CHARGER
Version: 1.8
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
INSTALLATION...................................................................................................................................................4
Unpacking and Inspection................................................................................................................................4
Preparation ......................................................................................................................................................4
Mounting the Unit.............................................................................................................................................4
Battery Connection ..........................................................................................................................................5
AC Input/Output Connection............................................................................................................................7
PV Connection.................................................................................................................................................9
Final Assembly............................................................................................................................................... 11
Communication Connection...........................................................................................................................11
OPERATION .....................................................................................................................................................12
Power ON/OFF ..............................................................................................................................................12
Operation and Display Panel.........................................................................................................................12
LCD Display Icons .........................................................................................................................................13
LCD Setting....................................................................................................................................................15
Display Setting...............................................................................................................................................23
Operating Mode Description..........................................................................................................................26
Fault Reference Code....................................................................................................................................30
Warning Indicator...........................................................................................................................................30
SPECIFICATIONS ...........................................................................................................................................31
Table 1 Line Mode Specifications ...................................................................................................................31
Table 2 Inverter Mode Specifications .............................................................................................................32
Table 3 Charge Mode Specifications ..............................................................................................................33
Table 4 General Specifications .......................................................................................................................33
TROUBLE SHOOTING.....................................................................................................................................34
Appendix: Approximate Back-up Time Table ...........................................................................................35

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. One piece of 150A fuse is 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.

2
INTRODUCTION
This is a multi-function inverter/charger, combining functions of inverter, solar charger and battery charger to
offer uninterruptible power support with portable size. Its comprehensive LCD display offers user-configurable
and easy-accessible button operation such as battery charging current, AC/solar charger priority, and
acceptable input voltage based on different applications.
For the detailed product specification, please consult your local dealers.
Features
Pure sine wave inverter
Configurable input voltage range for home appliances and personal computers via LCD setting
Configurable battery charging current based on applications via LCD setting
Configurable AC/Solar Charger priority via LCD setting
Compatible to mains voltage or generator power
Auto restart while AC is recovering
Overload/ Over temperature/ short circuit protection
Smart battery charger design for optimized battery performance
Cold start function
Basic System Architecture
The following illustration shows basic application for this inverter/charger. It also includes following devices to
have a complete running system:
Generator or Utility.
PV modules
Consult with your system integrator for other possible system architectures depending on your requirements.
This inverter can power all kinds of appliances in home or office environment, including motor-type appliances
such as tube light, fan, refrigerator and air conditioner.
Figure 1 Hybrid Power System

3
Product Overview
3KW/ 5KW model
1. LCD display
2. Status indicator
3. Charging indicator
4. Fault indicator
5. Function buttons
6. Power on/off switch
7. AC input
8. AC output
9. PV input
10. Battery input
11. Circuit breaker
12. USB communication port
13. RS-232 communication port
3KW/
5KW
side view

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:
The unit x 1
User manual x 1
Communication cable x 1
Software CD x 1
DC Fuse x 1
Ring terminal x 1
Strain relief plate x 2
Screws x 4
Preparation
Before connecting all wirings, please take off bottom cover by removing two screws as shown below.
Mounting the Unit
Consider the following points before selecting where to install:
Do not mount the inverter on flammable construction materials.
Mount on a solid surface
Install this inverter at eye level in order to allow the LCD display
to be read at all times.
For proper air circulation to dissipate heat, 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 installation position is to be 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 removing wires.
SUITABLE FOR MOUNTING ON CONCRETE OR OTHER NON-COMBUSTIBLE SURFACE ONLY.

5
Install the unit by screwing two 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 disconnect device between battery and inverter. It may not be requested to have a disconnect
device in some applications, however, it’s still requested to have over-current protection installed. Please refer
to typical amperage in below table as required fuse or breaker size.
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 as below.
Recommended battery cable size:
Model
Wire Size
Cable (mm2)
Torque value（max）
2 Nm
3KW/5KW
1 x 2AWG
35
Please follow below steps to implement battery connection:
1. Remove insulation sleeve 18 mm for positive and negative conductors.
2. Suggest to put bootlace ferrules on the end of positive and negative wires
with a proper crimping tool.
3. Fix strain relief plate to the inverter by supplied screws as shown in below
chart.

6
4.
Connect all battery packs as below chart. It’s suggested to connect at least 100Ah capacity battery for
3KW model and at least 200Ah capacity battery
for 5KW model .
5. Insert the battery wires flatly into battery connectors of inverter and make sure the bolts are tightened with
torque of 2 Nm in clockwise direction. Make sure polarity at both the battery and the inverter/charge is
correctly connected and conductors are tightly screwed into the battery terminals.
Recommended tool: #2 Pozi Screwdriver
6. To firmly secure wire connection, you may fix the wires to strain relief with cable tie.

7
WARNING: Shock Hazard
Installation must be performed with care due to high battery voltage in series.
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 3KW
and 50A for 5KW.
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
3KW
12 AWG
4
1.2 Nm
5KW
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 sleeve 10mm for six conductors. And shorten phase L and neutral conductor N 3 mm.
3. For 1KVA/2KVA models, simply connect AC utility to AC input of the inverter with a plug.
For 3KVA-5KVA models, 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)

8
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)
3KW/5KW
5. Make sure the wires are securely connected.
CAUTION: Appliances such as air conditioner are required 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 trig overload fault and cut off output to protect your appliance but sometimes it still causes
internal damage to the air conditioner.

9
PV Connection
CAUTION: Before connecting to PV modules, please install separately a DC circuit breaker 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 as below.
Model
Wire Size
Cable (mm2)
Torque value（max）
1 x 8AWG
10
1.6 Nm
3KW/
5KW
PV Module Selection: (Only for the model with MPPT solar charger)
When selecting proper PV modules, please be sure to consider below parameters:
1. Open circuit Voltage (Voc) of PV modules not exceeds max. PV array open circuit voltage of inverter.
2. Open circuit Voltage (Voc) of PV modules should be higher than min. battery voltage.
INVERTER MODEL
3KW
5KW
Max. PV Array Open Circuit Voltage
500
Vdc
PV Array MPPT Voltage Range
12
0~
450
Vdc
Take 250Wp PV module as an example. After considering above two parameters, the recommended module
configurations for 3KW and 5KW are listed as below table.
Maximum Power (Pmax) 250W
8 pieces in serial and 2 sets in parallel
Max. Power Voltage Vmpp(V) 30.1V
Max. Power Current Impp(A) 8.3A
Open Circuit Voltage Voc(V) 37.7V
Short Circuit Current Isc(A) 8.4A
PV Module Wire Connection
Please follow below steps to implement PV module connection:
1. Remove insulation sleeve 10 mm for positive and negative conductors.
2. Suggest to put bootlace ferrules on the end of positive and negative wires with a
proper crimping tool.
3. Fix strain relief plate to the inverter with supplied screws as shown in below
chart.
4. Check correct polarity of wire connection from PV modules and PV input connectors. Then, connect positive
pole (+) of connection wire to positive pole (+) of PV input connector. Connect negative pole (-) of
connection wire to negative pole (-) of PV input connector. Screw two wires tightly in clockwise direction.
Recommended tool: 4mm blade screwdriver

5. To ensure wires are securely connected, you fix wires to the strain relief with cable tie.
Final Assembly
After connecting all wirings, please put bottom cover back by screwing two screws as shown below.
Communication Connection
Please use supplied communication cable to connect to inverter and PC. Insert bundled CD into a computer and
follow on-screen instruction to install the monitoring software. For the detailed software operation, please
check user manual of software inside of CD.
10

OPERATION
Power ON/OFF
Side view of unit
Once the unit has been properly installed and the batteries are connected well, simply press On/Off switch
(located on the button of the case) to turn on the unit.
Operation and Display Panel
The operation and display panel, shown in below chart, is on the front panel of the inverter. It includes
three indicators, four function keys and a LCD display, indicating the operating status and input/output
power information.
LED Indicator
LED Indicator
Messages
Green
Solid On
Output is powered by utility in Line mode.
Flashing
Output is powered by battery or PV in battery mode.
Green
Solid On
Battery is fully charged.
Flashing
Battery is charging.
Red
Solid On
Fault occurs in the inverter.
Flashing
Warning condition occurs in the inverter.
Function Keys
Function Key
Description
ESC
To exit setting mode
UP
To go to previous selection
DOWN
To go to next selection
ENTER
To confirm the selection in setting mode or enter setting mode
LCD display
LED indicators
Function keys
11

LCD Display Icons
Icon
Function description
Input Source Information
Indicates the AC input.
Indicates the PV input
Indicate input voltage, input frequency, PV voltage, charger current (if PV in
charging for 3K models), charger power (only for MPPT models), battery
voltage.
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 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.
In AC mode, 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 Bottom bar will be on and the other three
bars will flash in turns.
2.083 ~ 2.167V/cell Bottom two bars will be on and the other
two bars will flash in turns.
> 2.167 V/cell Bottom three bars will be on and the top
bar will flash.
Floating mode. Batteries are fully charged. 4 bars will be on.
12

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%
Mode Operation Information
Indicates unit connects to the mains.
Indicates unit connects to the PV panel.
Indicates load is supplied by utility power.
Indicates the utility charger circuit is working.
Indicates the DC/AC inverter circuit is working.
Mute Operation
Indicates unit alarm is disabled.
13

LCD Setting
After pressing and holding ENTER button for 3 seconds, the unit will enter setting mode. Press “UP”or “DOWN”
button to select setting programs. And then, press “ENTER”button to confirm the selection or ESC button to
exit.
Setting Programs:
Program
Description
Selectable option
00
Exit setting mode
Escape
01
Output source priority:
To configure load power
source priority
Solar first
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 the loads at the same
time.
Utility provides power to the loads only
when any one condition happens:
- Solar energy is not available
- Battery voltage drops to low-level
warning voltage or the setting point in
program 12.
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.
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)
Available options in 1KW/2KW
model:
10A 20A
30A 40A
50A (default)
14

02
Maximum charging
current: To configure
total charging current
for solar and utility
chargers.
(Max. charging current
= utility charging
current + solar charging
current)
Available options in 3KVA model:
10A 20A
30A 40A (default for MPPT model)
50A (default for PWM model) 60A
70A (only for PWM model)
Available options in 3KW/
5KW
model:
10A 20A
30A 40A
50A (default for PWM model) 60A (default for MPPT model)
70A 80A
90A 100A
110A 120A (Only for MPPT model)
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.
15

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
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.
Available options in 1KVA/2KVA model:
10A 20A (default)
Available options in 3KVA model:
15A 25A (default)
Available options in 3KW/
5KW
model:
2A 10A
20A 30A (default)
40A 50A
60A
12
Setting voltage point
back to utility source
when selecting “SBU
priority”or “Solar first”
in program 01.
Available options in 1KVA model:
11.0V 11.3V
11.5V (default) 11.8V
12.0V 12.3V
12.5V 12.8V
16

12
Setting voltage point
back to utility source
when selecting “SBU
priority”or “Solar first”
in program 01.
Available options in 2KVA/3KVA/3KW
model:
22.0V 22.5V
23.0V (default) 23.5V
24.0V 24.5V
25.0V 25.5V
Available options in 5KW
model:
44V 45V
46V (default) 47V
48V 49V
50V 51V
13
Setting voltage point
back to battery mode
when selecting “SBU
priority”or “Solar first”
in program 01.
Available options in 1KVA model:
Battery fully charged 12.0V
12.3V 12.5V
12.8V 13.0V
17

13
Setting voltage point
back to battery mode
when selecting “SBU
priority”or “Solar first”
in program 01.
13.3V 13.5V (default)
13.8V 14.0V
14.3V 14.5V
Available options in 2KVA/3KVA/3KVA Plus model:
Battery fully charged 24V
24.5V 25V
25.5V 26V
26.5V 27V (default)
27.5V 28V
28.5V 29V
Available options in 5KVA model:
Battery fully charged 48V
49V 50V
18