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Solar Battery Backup System for Home 20kWh Lithium ion Battery LiFePo4 Powerwall

The BSLBATT B-LEP48V-400PW is an intelligent 20kWh (20.48kWh usable) solar battery backup system for home appliances. Combined with your solar system, you can reduce the consumption of electricity from the public grid by up to 90%, enabling so-called "local production, local consumption". You achieve optimum solar power storage utilization at all times. Since the home solar battery backup system is operated in parallel with the grid, you only draw the amount of electricity from the grid that may be required in addition to the storage electricity. This saves you money - in view of the electricity prices - and makes a valuable contribution to reducing the environmental pollution.
  • B-LFP48-400PW
Production Capacity::

Product Description

20kWh 48V 400Ah Lithium Ion Solar Battery Bank Home Off Grid Solar Power Systems Powerwall (1)

20 kWh BSLBATT Lithium Battery B-LFP48-400PW


B-LEP48-400PW is manufactured based on 48V 400Ah lithium ion battery ( LiFePo4) with built-in battery management system (BMS) and LCD display, LiFePo4 battery technology provides you with green and pollution-free home backup power with significantly higher battery efficiency than standard lead batteries. The B-LEP48-400PW can be installed directly on a power generation system such as a photovoltaic system, or it can be retrofitted at a later date. The solar battery system can be paralleled with up to 6 identical lithium battery packs, so you can choose the number you want to buy depending on your home energy needs!

20kWh lithium ion solar battery

battery powered homes


The built-in battery management system integrates with multilevel safety features including overcharge and deep discharge protection, voltage and temperature observation, over current protection, cell monitoring and balancing, and over-heat protection. This high-performance BSLBATT Lithium Battery has a large power capacity, with a fast charging and continuous discharge power, providing 98% efficiency. The advanced Lithium Ferro Phosphate (LFP) technology operates a wider temperature range to deliver the most dependable performance. LFP has been proven to be one of the safest Lithium technologies in the industry and is manufactured to the highest standards.


Self-generation will only pay off for you if you choose the right home solar lithium batteries and use them in the best possible way. Because most of your electricity is generated during the day, especially from photovoltaic systems, but during this time your unused power can only be fed into the grid, BSLBATT's smart power management system can help you maximize your solar power and save you money on electricity costs.




Our intelligent software combines weather, utility rate, and historical solar production and energy consumption data to continually drive energy efficiency and improve system performance to meet your specifically tailored goals.

The BSLBATT B-LEP48V-400PW is the ideal energy storage solution for grid-tied or off-grid solar installations. Lower your utility bill by avoiding the need to buy electricity at peak times with the BSLBATT Lithium Battery B-LEP48V-400PW. Order online or by PHONE +86 752 2819469

20kWh lithium battery


>> No high voltage for battery installation

>> Superior LiFePO4 Battery Safety Performance

>> Entire lithium-ion solar cell system tested and certified for safety

off grid solar battery


>> Quick and easy single person installation

>> Interconnects with standard household

home battery


>> Superior LiFePO4 battery technology with 10,000 cycles at 80% DOD

>> 10 years standard warranty

>> Modular design promotes redundancy



Model                                             BSLBATT LFP48V Lithium ion Battery PACK

          Electrical Characteristics

Nominal Voltage 48V(51.2V)
Nominal Capacity 50Ah/100Ah/200Ah/400Ah
Energy 2400Wh/5120Wh/10240Wh/20480Wh
Internal Resistance ≤60mΩ
Cycle Life

≥10000 cycles @ 80% DOD, 25, 0.5C

≥7000 cycles @ 80% DOD, 40, 0.5C

Design Life 10 - 20 Years
Months Self Discharge ≤2%@25
Effificiency of Charge ≥98%
Effificiency of Discharge ≥100% @ 0.2C ≥96% @ 1C



Charge Cut-off Voltage 54.0V±0.1V
Charge Mode 1C to 54.0V, then 54.0V charge current to  0.02C (CC/CV)
Charge Current 200A
Max. Charge Current 200A
Charge Cut-off Voltage 53 - 55 V (Floating charge voltage)


Continuous Current 200A T≥10℃
Max. Continuous Discharge Current 200A T≥10℃
Discharge Cut-off Voltage 38V±0.2V


Charge Temperature 0~60(Under 0 extra heating mechanism)
Discharge Temperature -20~60(Under 0work with reduced capacity)
Storage Temperature -40~55 @ 60%±25% relative humidity
Water Dust Resistance Ip21 (The battery cabinet supports Ip55)



Method 15S1P/15S2P/15S3P/15S4P
Case Iron (Insulation painting)


Weight Approx:210kG 
Gravimetric Specifific energy Approx:92Wh/kg
Protocol (optional) RS232-PC RS485(B)-PC RS485(A)-Inverter CANBUS-Inverter


SOC Light 6 * LED
Display Screen LCD(Optional)
Limit charge current 20A

Strong & Durable Structure

BSLBATT Powerwall home lithium battery adopts the patented rhombus 18650 LiFePO4 cells. The whole internal assembly from cells, modules, BMS to components are screw fastening that presenting utmost safety and reliability.

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                                   Performance Characteristics

Powerwall Long Life
Powerwall Different current
Powerwall Charging

solar battery for home use

More Home Battery Solutions >>>

BSLBATT is a high-tech company focused on the research and manufacture of lithium battery solutions for energy storage.

Therefore, with strong R&D and production capacity, the brand has developed excellent products in various fields of energy storage and obtained several patents. All of the company's products are manufactured in strict accordance with international standards and have been awarded CE, IEC, EMC, ROHS and UL certificates.

Currently, BSLBATT's leading energy solutions have reached more than 50,000 projects or shipments in Europe, Oceania, Africa and Asia. It supports customers to achieve energy self-sufficiency, ultimately achieving energy independence and global clean energy goals, and reducing network stress.

In this way, BSLBATT intends to become a low-carbon energy storage service provider. It aims to introduce superior new energy technologies to create a green future for the world and a healthy life for humanity.

As a result, the demand for solar storage solutions continues to grow as people adopt this energy source to meet their needs. Therefore, it is always good to have brands with evolving technologies, such as BSLBATT.

As one of the top lithium ion solar battery manufacturers, we can custom different specification batteries. Voltage: 12 to 48V; Capacity: 50Ah to 600ah.


Photovoltaic systems combined with the Solar Battery Backup System for Home are an effective way to achieve your energy transition goals. When a PV system produces sustainable electricity, your home battery backup ensures a steady supply of power, even when the sun isn't shining. One hundred percent self-sufficiency is difficult for private households to achieve. But every kilowatt-hour of solar power makes a difference. Not only in terms of climate: you can save a lot of money with a solar battery system.