Epever NPower Series User manual

1
NPower Series
——Pure Sine Wave Inverter
User Manual

Contents
Important Safety Instructions...........................................1
1. Overview.....................................................................6
2.Characteristics .............................................................8
3.Designations of models..............................................13
4. Schematic diagram for connections ..........................14
5.Installation instructions...............................................15
5.1 General installation notes..................................15
5.2Wire size &breaker.............................................15
5.3 Mounting...........................................................16
6. Protection..................................................................21
7. Troubleshooting.........................................................23
8. Maintenance..............................................................24
9. Technical Specifications ............................................25
AnnexⅠDisclaimer........................................................36

1
Important Safety Instructions
Please reserve this manual for future review.
This manual contains all the instructions about safety, installation, and
operation for NPower series pure sine wave inverter (hereinafter referred to as
the inverter).
1. Explanation of symbols
To enable the user to use the product efficiently, as well as to ensure personal
and property safety, this manual provides related information and emphasize
the following symbols.
Please read the related words carefully when you encounter the following
symbols in the manual.
WARNING: The entire system should be installed by professional
and technical personnel.
TIP:
Indicates 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.

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2. Requirements for professional and technical personnel
Professionally trained;
Familiar with related safety specification 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
IMPORTANT:: When receiving the inverter, please firstly check if
there is any damage occurred in transportation, if find any problem,
please contact the transportation company or our company in time.
CAUTION: Follow the instructions before placing or moving the
inverter.
CAUTION: Make sure there isn’t any arc danger in the operation
area before installation.
CAUTION: Inverter input is recommended to connect to battery, the
minimum capacity of battery (expressed in AH) should be calculated in
the following way: 5 times of the rated power of the inverter/battery
voltage.
WARNING: Keep the inverter out of children touch.
WARNING: It’s an off-grid inverter, do not connect the AC output
terminals to the utility or electrical source, otherwise the inverter may be
damaged.
WARNING: The inverter can be used singly, parallel connection or
in series will damage the inverters.

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5. Safety cautions for mechanical installation
WARNING: Before installation, must make sure the inverter has no
electrical connection.
WARNING: Ensure the heat dissipation space for the inverter
installation, and do not install the inverter in humid, greasy, flammable,
explosive, dust accumulative or other severe environments.
6. Safety cautions for electrical connection
CAUTION: Check if all the wiring connections are tight, to avoid the
danger of heat accumulation due to a loose connection.
CAUTION: The protective grounding must be connected to the
ground. The cross-section of the wire should not be less than 4mm2.
CAUTION: Connect the DC input according to the requirement
strictly. The power inverter has a relatively wide input range, but too high
or too low input may cause problems even destroy the inverter.
CAUTION: The wire connects between battery and inverter should
be shorter than 3m, the current density should be less than 5A/mm2while
the output of the inverter is fully loaded. If the wire is longer than 3m, the
current density should be reduced.
CAUTION: A fuse or breaker should be used between battery and
inverter; the value of fuse or breaker should be twice of the inverter rated
input current.
CAUTION: DO NOT put the inverter close to the flooded lead-acid
battery because the sparkle in the terminals may ignite the hydrogen
released by the battery.
WARNING: The output is forbidden to connect other power sources
or utility, otherwise the inverter will be damaged. The inverter must be in
off, when connecting load.
WARNING：Do not directly connect the battery charger or similar
devices to the input terminal of inverter.

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7.Safety cautions for inverter operation
WARNING HOT SURFACE: Do not touch it when the inverter is
working, its surface may become very hot. Keep away from the material
or device which may suffer from high temperature.
CAUTION: Do not open the inverter to operate when it is working.
WARNING: The AC output with high voltage during the inverter
operation, so do NOT touch the connection point, it may cause danger.
8.The dangerous operations which would cause electric arc, fire or
explosion
Touch the wire end which hasn’t been insulation treatedmay cause
electriferous.
Touch the wiring copper row, terminals or internal devices which may
causeelectriferous.
Power cable connection is loose.
Screw or other spare parts inadvertently falls into the inverter.
Incorrect operation by untrained non-professional or technical personnel.
WARNING:Once an accident occurs, must be handled by
professional and technical personnel. Any incorrect operation would
cause a more serious accident.
9. Safety cautions for stopping the inverter
After the inverter stop working for ten minutes, the internal conductive
devices could be touched.
The inverter can be restarted after removing the faults, which may affect
its safety performance.
No maintenance parts in the inverter, if any maintenance service is
required, please contact our after-sales service personnel.
WARNING：Do NOT touch or open the case after the device
powered off within ten mins.

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10. Safety cautions for inverter maintenance
Testing equipment is recommended to check the inverter without voltage
or current;
When conducting electrical connection and maintenance work, must post
temporary warning sign or put up barriers, to prevent unrelated personnel
from entering the electrical connection or maintenance area.
Improper maintenance operation to the inverter may cause personal
injury or equipment damage.
To prevent electrostatic damage, recommend to ware antistatic wrist
strap or avoid unnecessary contact with the circuit board.

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1. Overview
NPower series is a kind of pure sine wave inverter which can convert
12/24/48VDC to 220/230Vac.It is based on full digital and intelligent design, it
adopts the advanced SPWM technology, voltage and current double
closed-loop controlled and completely isolated inverter technology, such as to
ensure the product with high quality electrical parameters, the stronger ability
to resist impact load, the input surge prevention design at the same time.meet
the special requirements of lithium battery surge limit, to ensure the safety and
function of the inverter running and reliable.
The case is designed with galvanized board,which has the advantages of high
strength and corrosion resistance.
This product has the characteristics of high reliability, high efficiency, simple
appearance, complete protection function, easy installation and easy operation.
It is suitable for AC load of household appliances,power tools, industrial
equipment, electronic audio and video and solar photovoltaic power generation
system, such as vehicle inverter application system, solar RV, solar household,
solar yacht and solar power station.
Features：
Adoption of advanced SPWM technology, pure sine wave output
Adopt voltage and current double closed-loop control to enhance the load
capacity
The input and output adopt completely isolated inverter technology with
high reliability
The input adopts anti-surge design to meet the special requirements of
surge limitation of the lithium battery and avoid dangerous surge current
generated by connection of startup.
Low output harmonic distortion(THD≤3%)
The AC output adopts excellent EMC design to prevent interference of
connected equipment
Output voltage 220/230VAC and frequency 50/60Hz optional
Extensive protections: input reverse polarity, input overvoltage, input low
voltage, output overload and short circuit, overheating.

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OperRS485 port can connect the communication module, realize remote
start/stop inverter and monitor the running status via the APP or PC
software.
Set the input low voltage and low voltage reconnect voltage via the APP or
PC software
Set the inverter’s ID via the APP or PC software to monitor several
inverters.
The case is designed with the galvanized board, with high strength and
strong corrosion resistance
Chinese dual socket, Australia/New Zealand, European, Universal，
Terminal selectable
The remote meter is selectable
Easy maintenance and repair

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2.Characteristics
1)NP260～NP1200
2)NP1500～NP3500

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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
➀
Fault indicator(red)(5)
❺
AC outlet(2)
➁
Grounding terminal
❻
External switch connection point
➂
Mounting hole size
❼
AC output switch
(1) Ventilation fan
The cooling fan will be automatically turned on if the inverter could reach
any condition down below.
1)Heat sink temperature is higher than 45℃
2)Internal temperature is higher than 45℃
3)The output power is higher than same power，see the below table：.
Models
Instruction
NP260-12(X); NP260-22(X)
NP400-12(X); NP400-22(X)
NP600-12(X); NP600-22(X)
NP800-12(X)
NP1000-22(X)
NP1200-12(X); NP1200-22(X)
Internal temperature is higher than 10℃,
and the output power is higher than half of
the continues output power of 25℃.
NP2000-42(T)
NP2500-22(T)
NP3000-22(T);NP3000-42(T)
NP3500-42(T)
nternal temperature is higher than 10℃,
and the output power is higher than
1000W
“X”is C-chinese dual socket, A-Australia/New Zealand, E-European, M-
Universal.
The cooling fan will be automatically turned off when the inverter reaches
all the conditions down below.
1)Heat sink temperature is lower than40℃
2)Internal temperature is lower than 40℃
3) The output power is lower than same power，see the below table：
Models
Instruction
NP260-12(X); NP260-22(X)
The output power is lower than 80W
NP400-12(X); NP400-22(X)
The output power is lower than 150W

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NP600-12(X); NP600-22(X)
The output power is lower than 200W
NP800-12(X)
The output power is lower than 300W
NP1000-22(X)
The output power is lower than 400W
NP1200-12(X); NP1200-22(X)
The output power is lower than 500W
NP2000-42(T)
NP2500-22(T)
NP3000-22(T);NP3000-42(T)
NP3500-42(T)
The output power is lower than 800W
“X”is C-chinese dual socket, A-Australia/New Zealand, E-European, M-
Universal.
(2) AC outlet
Universal：
Chinese dual socket:

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Australia/New Zealand:
European:
Terminal：
(3)Mode switch

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When the switch of number 1 is on the 230V side, the output voltage is
230VAC, otherwise is 220VAC.
When the switch of number 2 is on the 60Hz side, the output frequency is
60Hz, otherwise is 50Hz.
CAUTION: Both the output frequency and voltage change
availability after restarting the inverter.
WARNING: DO NOT turn ON/OFF the mode switch when the
inverter is working.
(4)RS485 communication port
The RJ45 port pin definition is shown below:
1
5VDC
5
RS-485-A
2
5VDC
6
RS-485-A
3
RS-485-B
7
GND
4
RS-485-B
8
GND
(5)LED indicator and buzzer
Working indicator
Fault indicator
Buzzer
Status
Greensuper
flashing
Red off
No sounding
Standby
Green on solid
Red off
No sounding
Output is normal
Green slowly
flashing
Red off
Sounding
Input under
voltage
Green fast flashing
Red off
Sounding
Input over voltage
Green on solid
Red on solid
Sounding
Over temperature
Green off
Red fast flashing
Sounding
load short circuit
Green on solid
Red slowly flashing
Sounding
Overload
Green off
Red off
Sounding
Output voltage
abnormal

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3.Designations of models
Models
Input rated
voltage
Output rated
voltage
Output power
NP260-12(X)
12VDC
220/230VAC
260W
NP260-22(X)
24VDC
NP400-12(X)
12VDC
400W
NP400-22(X)
24VDC
NP600-12(X)
12VDC
600W
NP600-22(X)
24VDC
NP800-12(X)
12VDC
800W
NP1000-22(X)
24VDC
1000W
NP1200-12(X)
12VDC
1200W
NP1200-22(X)
24VDC
NP2000-42(T)
48VDC
2000W
NP2500-22(T)
24VDC
2500W
NP3000-22(T)
24VDC
3000W
NP3000-42(T)
48VDC
NP3500-42(T)
48VDC
3500W
“X”is C-chinese dual socket, A-Australia/New Zealand, E-European, M-
Universal.

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4. Schematic diagram for connections
1)NP260～NP1200
2)NP1500～NP3500
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.Installation instructions
5.1 General installation notes
Please read the manual carefully to get familiar with the installation steps
before installation.
Be very careful when installing the batteries, especially flooded lead-acid
battery. Please wear eye protection, and have fresh water available to rinse
if any contact with battery acid.
Keep the battery away from any metal objects, which may cause a short
circuit of the battery.
Loose connections and corroded wires may result in high heat that can
melt wire insulation, burn surrounding materials, or even cause a fire.
Ensure tight connections and use cable clamps to secure cables and
prevent them from swaying in motion.
Select the system connection cables according to the current density no
higher than 5A/mm2.(In accordance with the National Electrical Code
Article 690, NFPA70).
For outdoor installation, keep out of the direct sunshine and rain infiltration.
High voltage still exists inside the inverter after turning off the switch, do not
open or touch the internal devices, wait ten minutes before conducting
related operations.
Please do not install the inverter in humid, greasy, flammable, explosive,
dust accumulative or other severe environments.
AC output is high voltage,please do not touch the wiring connection.
When the fan is working, please do not touch it to avoid injury.
5.2Wire size &breaker
Wiring and installation mode should comply with national and local electrical
code requirements.
Wire, terminals and breaker selection for battery
Models
Battery wire
size
Terminal
Breaker
NP260-12(X)
6mm2/10AWG
RNB5.5-6
DC/2P—40A
NP260-22(X)
4mm2/12AWG
RNB5.5-6
DC/2P—20A

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NP400-12(X)
10mm2/8AWG
RNB8-6S
DC/2P—63A
NP400-22(X)
6mm2/10AWG
RNB5.5-6
DC/2P—32A
NP600-12(X)
16mm2/6AWG
RNB14-8
DC/2P—80A
NP600-22(X)
6mm2/10AWG
RNB8-8
DC/2P—40A
NP800-12(X)
25mm2/4AWG
RNB22-6L
DC/2P—125A
NP1000-22(X)
16mm2/6AWG
RNB14-6L
DC/2P—63A
NP1200-12(X)
25mm2/4AWG
RNB22-6L
DC/2P—125A
NP1200-22(X)
16mm2/6AWG
RNB14-6L
DC/2P—63A
NP2000-42(T)
16mm2/6AWG
RNB14-10
DC/2P—63A
NP2500-22(T)
35mm2/2AWG
RNB38-10
DC—100A
(2P in parallel)
NP3000-22(T)
50mm2/1/0AWG
RNB38-10
DC—100A
(2P in parallel)
NP3000-42(T)
25mm2/4AWG
RNB22-10
DC/2P—100A
NP3500-42(T)
25mm2/4AWG
RNB22-10
DC/2P—125A
“X”is C-chinese dual socket, A-Australia/New Zealand, E-European, M-
Universal.
Wire and breaker selection for AC output
Models
Wire size
Breaker
NP2000-42(T)
1.5mm2/16AWG
AC/2P—10A
NP2500-22(T)
2.5mm2/14AWG
AC/2P—10A
NP3000-22(T)
2.5mm2/14AWG
AC/2P—16A
NP3000-42(T)
2.5mm2/14AWG
AC/2P—16A
NP3500-42(T)
2.5mm2/14AWG
AC/2P—16A
IMPORTANT: The wire size and terminal are for reference only, use
thicker wires to lower the voltage drop and improve the system
performance when the distance between inverter and batter is far.
IMPORTANT: The above wire size and circuit breaker size are for
recommendation only, please choose suitable wire and circuit breaker
according to the practical situation.
5.3 Mounting
Installation steps：
Step1：Professional personnel read this manual carefully.
Step2：Determination of installation location and heat-dissipation space.

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Important:The inverter shall be installed in a place with sufficient
air flow through the dissipation pad of the inverter and a minimum
clearance of 150mm from the upper and lower edges of inverter to ensure
natural thermal convection.
CAUTION:The inverter shall be cooling through housing if
installed in a closed box.
1)NP260～NP1200
2)NP1500～NP3500
Step3：Wiring
WARNING：The AC equipment shall be determined by the
continuous output power of the inverter, but the surge power must
be lower than the instantaneous surge power of the inverter.
CAUTION:The switch of inverter isOFF before wiring.
CAUTION: DONOT close the circuit breaker or fuse and make sure
that the leads of “+” and “-”poles are connected correctly while wiring
the inverter.