PowMr POW-LVM3K-24V-H User manual

1
Important Safety Instructions
Please save these instructions for future use!
This manual contains all safety, installation and operating instructions for the POW-LVM3K Series
all-in-one solar charge inverter.
Please read all instructions and precautions in the manual carefully before installation and
use.
⚫Non-safety voltage exists inside the all-in-one solar charge inverter. To avoid personal injury,
users shall not disassemble the all-in-one solar charge inverter themselves. Contact our
professional maintenance personnel if there is a need for repair.
⚫Do not place the all-in-one solar charge inverter within the reach of children.
⚫Do not install the all-in-one solar charge inverter in harsh environments such as moist, oily,
flammable or explosive, or heavily dusty areas.
⚫The mains input and AC output are high voltage, so please do not touch the wiring terminals.
⚫The housing of the all-in-one solar charge inverter is hot when it is working. Do not touch it.
⚫Do not open the terminal protective cover when the all-in-one solar charge inverter is working.
⚫It is recommended to attach proper fuse or circuit breaker to the outside of the all-in-one solar
charge inverter.
⚫Always disconnect the fuse or circuit breaker near the terminals of PV array, mains and battery
before installing and adjusting the wiring of the all-in-one solar charge inverter.
⚫After installation, check that all wire connections are tight to avoid heat accumulation due to poor
connection, which is dangerous.
⚫The all-in-one solar charge inverter is off-grid. It is necessary to confirm that it is the only input
device for load, and it is forbidden to use it in parallel with other input AC power to avoid
damage.

2
Important Safety Instructions....................................................................................................... 1
Production Instructions................................................................................................................ 4
Features ................................................................................................................................. 5
Basic System Introduction....................................................................................................... 6
Production Overview............................................................................................................... 7
Dimension Drawing................................................................................................................. 8
Installation..................................................................................................................................... 9
Installation Notice ................................................................................................................... 9
Select the Mount Location..................................................................................................... 10
Mount the Inverter................................................................................................................. 10
Preparation............................................................................................................................11
Connection .................................................................................................................................. 12
Wiring Specification and Breaker Type.................................................................................. 12
AC Input/Output Wiring ......................................................................................................... 13
PV Input Wiring..................................................................................................................... 14
Battery Wiring....................................................................................................................... 15
Final Assembly..................................................................................................................... 16
Start Up the Inverter ............................................................................................................ 16
Operation Mode........................................................................................................................... 17
Charging Mode ..................................................................................................................... 17
Output Mode......................................................................................................................... 18
Operation Instruction.................................................................................................................. 19
Operation and Display Panel ................................................................................................ 19
Introduction to LCD Screen................................................................................................... 20
Real-time Data Viewing Method............................................................................................ 22
Setting Parameter................................................................................................................. 23
Battery Type Parameters ...................................................................................................... 32
Other Functions .......................................................................................................................... 34
Dry Node .............................................................................................................................. 34
RS485 Communication Port.................................................................................................. 34
Table of Contents

3
CAN Communication Function.............................................................................................. 34
USB communication port ...................................................................................................... 34
Protection.................................................................................................................................... 35
Protections Provided............................................................................................................. 35
Fault Code Meaning ............................................................................................................. 37
Troubleshooting .................................................................................................................... 39
System maintenance .................................................................................................................. 40
Technical parameters ................................................................................................................. 41

4
Production Instructions
POW-LVM3K series is a new all-in-one hybrid solar charge inverter, which integrates solar energy
storage & means charging energy storage and AC sine wave output. Thanks to DSP control and
advanced control algorithm, it has high response speed, high reliability and high industrial standard.
Four charging modes are optional, i.e. Only Solar, Mains Priority, Solar Priority and Mains & Solar
hybrid charging; and two output modes are available, i.e. Inverter and Mains, to meet different
application requirements.
The solar charging module applies the latest optimized MPPT technology to quickly track the
maximum power point of the PV array in any environment and obtain the maximum energy of the
solar panel in real time.
Through a state of the art control algorithm, the AC-DC charging module realizes fully digital
voltage and current double closed loop control, with high control precision in a small volume. Wide
AC voltage input range and complete input/output protections are designed for stable and reliable
battery charging and protection.
Based on full-digital intelligent design, the DC-AC inverter module employs advanced SPWM
technology and outputs pure sine wave to convert DC into AC. It is ideal for AC loads such as
household appliances, power tools, industrial equipment, and electronic audio and video
equipment. The product comes with a segment LCD display design which allows real-time display
of the operating data and status of the system. Comprehensive electronic protections keep the
entire system safer and more stable.
Production Instructions

5
Features
⚫Full digital voltage and current double closed loop control, advanced SPWM technology, output
of pure sine wave.
⚫Two output modes: Mains bypass and inverter output; Uninterrupted power supply.
⚫Available in 4 charging modes: Only Solar, Mains Priority, Solar Priority and Mains and Solar
hybrid charging.
⚫Advanced MPPT technology with an efficiency of 99.9%.
⚫Designed with a LCD screen and 3 LED indicators for dynamic display of system data and
operating status.
⚫ON/OFF rocker switch for AC output control.
⚫Power saving mode available to reduce no-load loss.
⚫Intelligent variable speed fan to efficiently dissipate heat and extend system life.
⚫Lithium battery activation by PV solar or mains, allowing access of lead-acid battery and lithium
battery.
⚫360 °all-round protection with a number of protection functions.
⚫Complete protections, including short circuit protection, over voltage and under voltage
protection, overload protection, reverse protection, etc.

6
Basic System Introduction
The figure below shows the system application scenario of this product. A complete system
consists of the following parts:
1. PV module: Convert light energy into DC power, and charge the battery through the all-in-one
solar charge inverter, or directly invert into AC power to drive the load.
2. Mains or generator: Connected at the AC input, to power the load while charging the battery. If
the mains or generator is not connected, the system can also operate normally, and the load is
powered by the battery and PV module.
3. Battery: Provided to ensure normal power supply to the system loads when solar energy is
insufficient and the Mains is not connected.
4. Household load: Allow connection of various household and office loads, including
refrigerators, lamps, TVs, fans and air conditioners.
5. All-in-one solar charge inverter: The energy conversion unit of the whole system.
Specific system wiring method depends on the actual application scenario.

7
Production Overview
①
AC input port
⑨
Cooling fan
②
AC output port
⑩
Battery port
③
CAN communication port
⑪
Cooling fan
④
USB communication port
⑫
ON/OFF rocker switch
⑤
RS485 communication port
⑬
PV port
⑥
Dry contact port
⑭
Touch the key lightly
⑦
Grounding screw hole
⑮
LED Indicator
⑧
Overload protector
⑯
LCD screen

8
Dimension Drawing

9
Installation
Installation Notice
Please read this manual carefully prior to installation to familiarize yourself with the installation
steps.
⚫Be very careful when installing the battery. Wear safety goggles when installing a lead-acid
liquid battery. Once coming into contact with the battery acid, rinse with clean water timely.
⚫Do not place metal objects near the battery to prevent short-circuit of the battery.
⚫Acid gas may be generated when the battery is charged. So, please ensure good ventilation.
⚫When installing the cabinet, be sure to leave enough space around the all-in-one solar charge
inverter for heat dissipation. Do not install the all-in-one solar charge inverter and lead-acid
battery in the same cabinet to avoid corrosion by acid gas generated during battery operation.
⚫Only the battery that meets the requirements of the all-in-one unit can be charged.
⚫Poorly connected connections and corroded wires may cause great heat which will melt the wire
insulation, burn the surrounding materials, and even cause fires. So, make sure the connectors
have been tightened, and the wires are secured with ties to avoid looseness of connections
caused by shaking of wires during mobile application.
⚫The system connection wires are selected according to a current density of not more than 5
A/mm².
⚫Avoid direct sunlight and rainwater infiltration for outdoor installation.
⚫Even after the power is turned off, there is still high voltage inside the unit. Do not open or touch
the internal components, and avoid related operations until the capacitor completely discharges.
⚫Do not install the all-in-one solar charge inverter in harsh environments such as moist, oily,
flammable or explosive, or heavily dusty areas.
⚫Polarity at the battery input end of this product shall not be reversed, otherwise it may damage
the device or cause unpredictable danger.
⚫The mains input and AC output are high voltage, so please do not touch the wiring terminals.
⚫When the fan is working, do not touch it to prevent injury.
⚫Load equipment input power needs to confirm that this all-in-one solar charge inverter is the only
input device, and it is forbidden to use in parallel with other input AC power to avoid damage. It
is necessary to confirm that the solar charge inverter is the only input device for load equipment,
and it is forbidden to use it in parallel with other input AC power to avoid damage.
Installation