Epever NPower Series User manual

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PURE SINE WAVE INVERTER
USER MANUAL
NP260; NP400；
NP600; NP800; NP1000
NP1200; NP1500; NP2000
NP2500; NP3000; NP3500
NP4000; NP5000

Contents
Important safety instructions 1
1 Overview 5
2 Characteristics 6
3 Naming rule 11
4 Connection diagram 12
5 Remote meter(Optional) 14
5.1 Appearance 14
5.2 Status display 14
5.3 Buttons 15
5.4 LCD interface 15
5.5 Settings 15
5.6 Error code 16
6 Installation 17
6.1 Attentions 17
6.2 Wire size and circuit breaker 17
6.3 Mounting 19
7 Protections 26
8 Troubleshooting 28
9 Maintenance 29
10 Specifications 30
AnnexⅠ Disclaimer 43

1
Important safety instructions
Please reserve this manual for future review.
This manual contains all the instructions about safety, installation, and operation for the NPower series
pure sine wave inverter (in the following, referred to as the inverter).
1. Explanation of symbols
To enable the user to use the product efficiently and ensure personal and property safety, please read the
related words carefully when encountering the following symbols in the manual.
Symbol
Definition
TIP
Indicate any practical advice for reference.
IMPORTANT: Indicates a critical tip during the operation, if ignored, may cause the
device to run in error.
CAUTION: Indicates potential hazards, if not avoided, may cause the device
damaged.
WARNING: Indicates the danger of electric shock, if not avoided, would cause
casualties.
WARNING HOT SURFACE: Indicates the risk of high temperature, if not avoided,
would cause scalds.
Read the user manual carefully before any operation.
WARNING
The entire system should be installed by professional and technical personnel.
2. Requirements for professional and technical personnel
Professionally trained;
Familiar with related safety specifications for the electrical system;
Read the entire user manual to get related safety cautions.
3. Professional and technical personnel is allowed to do
Install the inverter to the specified location;
Test-run before installation;
Operate and maintain the inverter.
4. General installation notes

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IMPORTANT
When you receive the inverter, check whether there is any damage in
transportation. Contact the transportation company, our local distributor, or our
company for any problem.
CAUTION
When placing or moving the inverter, follow the instructions in the manual.
When installing the inverter, evaluate whether the operation area exists arc
danger.
The inverter needs to be connected to a battery. The battery's minimum
capacity (Ah) is recommended to be five times the current that equals the
inverter's rated output power divided by the battery's voltage.
WARNING
Keep the inverter out of the reach of children.
This inverter is an off-grid type. It is strictly prohibited to connect the inverter to
the grid. Otherwise, the inverter will be damaged.
This inverter is only allowed for stand-alone operation. It is prohibited to
connect multiple units in parallel or series. Otherwise, the inverter will be
damaged.
5. Safety cautions for mechanical installation
WARNING
Before installation, ensure the inverter has no electrical connection.
Confirm enough heat dissipation space for the inverter before installation. Do not
install the inverter in a harsh environment such as humid, salt spray, corrosion,
greasy, flammable, explosive, or dust accumulation.
6. Safety cautions for electrical connection
CAUTION
Check whether wiring connections are tight to avoid the danger of heat
accumulation due to loose connections.
The protective grounding is connected to the ground. The cross-section of the
wire should not be less than 4mm2.
The DC input voltage must strictly follow the parameter table. Too high or too low
DC input voltage will affect the inverter's normal operation and damage it.
It is recommended that the connection length between the battery and the
inverter be less than 3 meters. If greater than 3 meters, please reduce the current
density of the connection wire.
A fuse or breaker should be used between battery and Inverter; the fuse or

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breaker's rated current should be twice the inverter rated input current.
DO NOT install the inverter close to the flooded lead-acid battery because the
terminals' sparkle may ignite the hydrogen released by the battery.
WARNING
The AC output terminal is only for the load connection. Do NOT connect it to
another power source or utility. Otherwise, the inverter will be damaged. Turn off
the inverter when connecting loads.
It is strictly forbidden to connect a transformer or a load with a surge power (VA)
exceeding the overload power at the AC output port. Otherwise, the damage will
be caused to the inverter.
Do not connect battery chargers or other similar products to the input terminal of
the inverter. Otherwise, the inverter will be damaged.
7. Safety cautions for inverter operation
WARNING
HOT
SURFACE
When the inverter is working, the cover temperature is very high because of the
accumulated heat; please do not touch it.
CAUTION
When the inverter is running, please do not open the cabinet.
WARNING
The inverter's AC output is of high voltage, do not touch the wiring connection to
avoid electric shock.
8. The dangerous operations which would cause electric arc, fire or explosion
Touch the wire end that hasn't been insulation treated and maybe electriferous.
Touch the wiring copper row, terminals, or internal modules of the inverter that may be electriferous.
The connection of the power cable is loose.
Screw or other spare parts inadvertently falls into the inverter.
Improper operations by untrained non-professional or technical personnel.
WARNING
Once an accident occurs, it must be handled by professional and technical personnel.
Improper operations would cause more serious accidents.
9. Safety cautions for stopping the inverter
After the inverter stop running for five minutes, the internal conductive modules could be touched.
The inverter is allowed to restart after removing the faults, which affects safety performance.

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There are no serviceable parts inside. If any maintenance service is required, please contact our
service personnel.
WARNING
Do NOT touch or open the shell after the inverter is powered off within ten minutes.
10. Safety cautions for inverter maintenance
It is recommended to check the inverter with testing equipment to ensure there is no voltage and
current.
When conducting electrical connection and maintenance, post a temporary warning sign or put up
barriers to prevent unrelated personnel from entering the electrical connection or maintenance area.
An improper operation of the inverter may cause personal injury or equipment damage.
Please wear an anti-static wrist strap to prevent static damage or avoid unnecessary contact with
the circuit board.

5
1 Overview
Based on a full-digital intelligent technology, the NPower series is a pure sine wave inverter, converting
12/24/48V DC power to 220/230V AC power. With advanced SPWM technology, voltage-current double
closed-loop control, and completely isolated inverter technology, the NPower has high-quality electrical
parameters and a stronger ability to resist impact load. The input terminal's surge prevention helps meet
the lithium battery's special requirements and ensures the inverter's safety and reliability.
The cage is designed with a galvanized board of high strength and corrosion resistance.
With high reliability, high efficiency, complete protection function, easy installation and operation, the
inverter is suitable for AC loads of household appliances, power tools, industrial equipment, electronic
audio and video, and solar PV power generation system(such as vehicle inverter application, solar RV,
solar household, solar yacht, and solar power station, etc.)
Features：
Advanced SPWM technology and pure sine wave output
Full digital double closed-loop control to enhance the load capacity
Completely isolated inverter technology for the input and output
Anti-surge design to support the lithium battery system perfectly
Lower output harmonic distortion (THD≤3%)
Excellent EMC design for the AC output to prevent interference of connected equipment
Selectable output voltage(220/230VAC) and frequency(50/60Hz) by the DIP switch
Extensive protection: input reverse polarity, input over voltage, input low voltage, output overload,
output short circuit, and overheating
Remote control and monitor the inverter by APP or PC software
Configurable input under voltage and input under voltage reconnect voltage via the APP or PC
software
Set the inverter's ID via the APP or PC software to monitor several inverters.
Adopt a Galvanized board of high strength and strong corrosion resistance for the cage
Selectable output terminal: Chinese dual-socket, Australia/New Zealand, European, Universal, and
Terminal
Display running status by the local device(only NP4000-22(T) and NP5000-42(T)), optional external
remote meter
Easy maintenance and repair

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2 Characteristics
NP260/NP400/NP600/NP800/NP1000/NP1200
NP1500/NP2000/NP2500/NP3000/NP3500, NP4000-42

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NP4000-22, NP5000-42
CAUTION
The appearance varies with different product models; please refer to the actual
product appearance.
❶
Ventilation fan (1)
❽
Mode switch(3)
❷
Handle
❾
RS485 communication port(4)
❸
DC input terminal positive
❿
Working indicator(green)(5)
❹
DC input terminal negative
⓫
Fault indicator(red)(5)
❺
AC output port(2)
⓬
Grounding terminal
❻
External switch connection point
⓭
Mounting hole size
❼
AC output switch
(1) Ventilation fan
The cooling fan is automatically turned on if the inverter meets any condition below.

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1) Heat sink temperature is higher than 45℃
2) Internal temperature is higher than 45℃
3) The output power is higher than the defined power，see the table below:
Models
Instruction
NP260-11; NP260-12; NP260-21;
NP260-22;
NP400-12; NP400-22;
NP600-11; NP600-12; NP600-21;
NP600-22;
NP800-12;
NP1000-11; NP1000-21; NP1000-22;
NP1000-41; NP1000-42;
NP1200-12; NP1200-22;
NP2500-11; NP2500-21; NP2500-41
Internal temperature is higher than 10℃, and the output
power is higher than 50% of the continuous output power.
NP1500-12; NP1500-22;
NP2000-11; NP2000-12; NP2000-21;
NP2000-22;
NP2000-41; NP2000-42;
NP2500-12; NP2500-22; NP2500-42;
NP3000-22; NP3000-42;
NP3500-42;
NP4000-22;
NP5000-42
Internal temperature is higher than 10℃, and the output
power is higher than 1000W
NP4000-42
Internal temperature is higher than 10℃, and the output
power is higher than 2000W
The cooling fan is automatically turned off when the inverter meets all the conditions below.
1) Heat sink temperature is lower than40℃
2) Internal temperature is lower than 40℃
3) The output power is lower than the defined power，see the table below:
Models
Instruction
NP260-11; NP260-12; NP260-21; NP260-22
The output power is lower than 80W
NP400-12; NP400-22
The output power is lower than 150W
NP600-11; NP600-12; NP600-21; NP600-22
The output power is lower than 200W
NP800-12;
NP1000-11; NP1000-21; NP1000-41; NP1000-42
The output power is lower than 300W
NP1000-22
The output power is lower than 400W
NP1200-12; NP1200-22
The output power is lower than 500W
NP2000-11; NP2000-21; NP2000-41
The output power is lower than 600W

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NP2500-11; NP2500-21; NP2500-41
The output power is lower than 750W
NP1500-12; NP1500-22;
NP2000-12; NP2000-22; NP2000-42;
NP2500-12; NP2500-22; NP2500-42;
NP3000-22; NP3000-42;
NP3500-42;
NP4000-22;
NP5000-42
The output power is lower than 800W
NP4000-42
The output power is lower than 1200W
(2) The AC output port varies with different products. Please refer to chapter 3 Naming rule for the
specific supported types.
(3) Mode switch
When the switch of number 1 is on the 230V side, the output voltage is 230VAC; otherwise, it is
220VAC.
When the switch of number 2 is on the 60Hz side, the output frequency is 60Hz; otherwise, it is 50Hz.
WARNING
DO NOT turn ON/OFF the mode switch when the inverter is working.
CAUTION
Both the output frequency and voltage change are available after restarting the
inverter.
(4) RS485 communication port
The RJ45 port pin definition is shown below:
Pin
Definition
Instruction
Pin
Definition
Instruction
1
+5VDC
5V/200mA
5
RS485-A
RS485-A
2
+5VDC
6
RS485-A
3
RS485-B
RS485-B
7
GND
Power GND
4
RS485-B
8
GND

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(5) LED indicator and buzzer
Working indicator
Fault indicator
Buzzer
Status
Green super flashing
Red off
No beeps
Standby
Green on solid
Red off
No beeps
Output is normal
Green slowly flashing
Red off
Beeps
Input under voltage
Green fast flashing
Red off
Beeps
Input over voltage
Green on solid
Red on solid
Beeps
Over temperature
Green off
Red fast flashing
Beeps
load short circuit
Green on solid
Red slowly flashing
Beeps
Overload
Green off
Red off
Beeps
Output voltage
abnormal

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3 Naming rule
Explanations for the AC output port:
Suffix
Instruction
Figure
Suffix
Instruction
Figure
C
Chinese
dual-socket
E
European
socket
A
Australia
socket
N
American
Socket
M
Universal
socket
T
Terminal
CAUTION
For detailed product model Vs. AC output port; please refer to the "NPower
Model List".

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4 Connection diagram
NP260/NP400/NP600/NP800/NP1000/NP1200
NP1500/NP2000/NP2500/NP3000/NP3500, NP4000-42

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NP4000-22, NP5000-42
CAUTION
Connect the DC input directly to the battery port is recommended. DO NOT connect
to the battery terminal of the controller. Otherwise, the charging frequency spikes of
the controller may lead to over-voltage protection of the inverter.

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5 Remote meter(Optional)
5.1 Appearance
❶
LCD
❹
Working status indicator(Blue)
❷
UP/Setting button
❺
DOWN/Enter button
Output ON/OFF button
❸
Fault indicator(red)
❻
Fixing screws
The display screen can be viewed clearly when the angle between the end-user's horizontal
sight and the display screen is within 90°. If the angle exceeds 90°, the information on the display
screen cannot be viewed clearly.
5.2 Status display
Working status indicator
Fault indicator
Buzzer
Status
Blue ON solid
Red OFF
No beeps
Output voltage
normal
Blue slowly flashing(1/4Hz)
Red OFF
Buzzer beeps
Input under voltage
Blue fast flashing (1Hz)
Red OFF
Buzzer beeps
Input over voltage
Blue OFF
Red ON solid
Buzzer beeps
Inverter over
temperature
Heat sink over
temperature
Blue OFF
Red fast flashing
(1Hz)
Buzzer beeps
Load short circuit
Blue ON solid
Red slowly
flashing(1/4Hz)
Buzzer beeps
Overload

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Blue OFF
Red OFF
Buzzer beeps
Output voltage
abnormal
5.3 Buttons
Click
Move up
Press for 2s
In the real-time interface, press it for 2s to enter the
setting interface.
In the setting interface, press it for 2s to enter the
parameters configuration interface.
Click
Move down
Press for 2s
In the real-time interface, press it to turn on/off the load
output (default ON)
Confirm the settings
+
Click
In the setting interface, click them to exit the parameters
configuration interface.
Press for 2s
In the real-time interface, press them for 2s to clear the
faults.
CAUTION
The long buzzer beeps for the parameter confirming and short beeps for other button
operations.
5.4 LCD interface
Click or to browse the real-time interface.
5.5 Settings
Operation:
Step1: In the real-time interface, press for 2s to enter the setting interface.
Step2: Click or to select the parameter to be configured.
Step3: Press for 2s to enter the configuration interface of the specified parameter.
Step4: Click or to configure the parameter value.
Step5: Press for 2s to confirm the configuration.
Step6: Click + to exit the current interface.

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Display
Parameters
Default
User define
Output voltage class①
220VAC
220VAC/ 230Vac
110VAC
110VAC/ 120VAC
Output frequency class
①
50Hz
50Hz/60Hz
LCD backlight time
30s
30s/ 60s/100s(ON solid)
Low voltage
disconnect voltage②
12V: 10.8V
24V: 21.6V
48V: 43.2V
12V: 10.5V~14.2V; step size 0.1V
24V: 21V-30.2V; step size 0.1V
48V: 42V-62.4V; step size 0.1V
Low voltage reconnect
voltage②
12V: 12.5V
24V: 25V
48V: 50V
12V: 11.5V~15.2V; step size 0.1V
24V: 22V-31.2V; step size 0.1V
48V: 43V-63.4V; step size 0.1V
Over voltage reconnect
voltage②
12V: 14.5V
24V: 29V
48V: 58V
12V: 11.5V~15.2V; step size 0.1V
24V: 22V-31.2V; step size 0.1V
48V: 43V-63.4V; step size 0.1V
Over voltage
disconnect voltage②
12V: 16V
24V: 32V
48V: 64V
12V: 12.5V~16.2V; step size 0.1V
24V: 23V-32.2V; step size 0.1V
48V: 44V-64.4V; step size 0.1V
①After configuring the parameters marked with ①, the inverter will restart automatically. It will
resume work according to the new parameter value.
②For the parameter user defines, please refer to the input voltage rules in Chapter 7 Protections.
Otherwise, the parameter setting will not succeed.
5.6 Error code
Error code
Faults
Buzzer
Inverter over temperature
Heat sink over temperature
Five beeps
Input over voltage
Input low voltage
Output short circuit
Output overload
Output voltage abnormal