EU Seplos V4 48V DIY Battery Kits 51.2V280AH Solar Battery System

Basic Introduction

This battery system is suitable for household energy storage and small and medium-sized commercial energy storage. It support users to use 3.2V 280Ah/304Ah/314Ah/320Ah lithium battery cells to form a 1-parallel 16-series battery module and an intelligent BMs to form a 51.2V lithium battery system. The system supports up to 16 groups of batteries in parallel. This system is prohibited from being used in series and mixed with other batteries of different brands and models.

2025 New Upgrade V4 Battery Box

Battery configuration: 1P16S ​

Nominal Voltage: 51.2V ​

Working voltage range: 43.2V~58.4V ​

Rated Capacity: 280AH/304AH/306AH/314AH (Without battery) ​

Energy: 14.3~16KWH

​Standard charging/ discharging current: 100A/200A@25+2℃ ​

Maximum charging current: 200A@25+2℃

​Maximum discharge current: 200A@25+2℃ ​

Working environment temperature: 0~40°℃(charge) -20~40°C(Discharge) ​

Storage temperature and humidity: -100C~35C(1 months)25+2°C(3 months)65%+20%RH ​

Dimension(LxWxH): 260*415*898.5mm

​Weight: 38kg( without battery) ​

Cycle life: 8000cyels@25°C50A charge discharge current 80%DOD ​

IP level: IP20 ​

Communication: CAN/RS485 ​

Altitude: 0-3000m ​

Humidity range: 5%-95%

Basic working mode

1. Charging Mode

When the BMs detects that the charger is connected and the external charging voltage is

greater than the internal battery voltage by more than 0.5v, it turns on the charging MOSFET for

charging. When the charging current reaches the effective charging current, it enters the charging

mode. In the charging mode, both the charging and discharging MOSFETs are closed

2. Discharge mode

The BMs enters the discharge mode when it detects that the load is connected and the discharge

current reaches the effective discharge current.

3. Standby mode

When neither of the above two modes is satisfied, it enters the standby mode.

4. Shutdown Mode

After 48 hours of normal standby, battery triggers undervoltage protection, key shutdown or

external switch shutdown, the BMS enters shutdown mode.

5. Wake-up conditions for shutdown mode: 1. charging activation; 2. 48V voltage activation; 3. Key

startup.

Choose a Suitable Installation Location

Do not place the battery on flammable building materials

The temperature should be between 10'℃ and 30'℃ to maintain optimal operation.

It is recommended to place the battery on a level surface.

There should be some free space around the battery to dissipate heat (as shown below) Suitable for

placement on concrete or other non-flammable surfaces