This home energy storage system uses 48V LiFePO4 batteries to store rooftop solar energy and supply selected household circuits during a grid outage.
The system was configured around daily energy consumption, essential loads, inverter output, installation space and required backup time. Smart BMS communication and modular battery expansion were included in the system review.
The customer required a solar battery backup system that could store daytime solar generation, support essential household circuits and provide power when the utility grid was unavailable.
Project requirements included:
Battery capacity was calculated from household energy consumption, connected backup loads, required runtime, usable battery percentage and inverter efficiency.
A practical starting formula is:
Required Battery Energy (Wh) = Daily Backup Energy (Wh) × Backup Days ÷ Usable Battery Percentage ÷ Inverter Efficiency
For example, a home requiring 5,000Wh per day, with 80% usable battery capacity and 90% inverter efficiency, requires approximately 6,944Wh of nominal battery capacity for one day of backup:
5,000Wh ÷ 0.80 ÷ 0.90 = 6,944Wh
Additional capacity may be required for temperature, battery aging, higher seasonal energy use and periods of limited solar generation.
The sizing review covered:
The term “whole-home backup” does not mean every appliance can operate at the same time. Available backup power depends on the battery capacity, inverter output, connected circuits and operating power of each appliance.
The project uses modular 48V or 51.2V LiFePO4 batteries with an integrated Smart BMS. Battery capacity, BMS current and communication settings were matched to the inverter and household loads.
The battery configuration includes:
The inverter model, firmware, communication protocol, household loads and backup-time requirements were reviewed before the battery configuration was finalized.
System integration covered:
Inverter communication compatibility depends on the inverter model, firmware, BMS protocol and cable pinout. These details must be confirmed for each project.
The installation layout was planned around the battery enclosure, inverter position, DC cable length, electrical protection and access for inspection.
Installation requirements included:
The battery should be installed in a protected location and in accordance with the battery specification, inverter requirements and applicable local electrical rules.
During normal operation, the battery stores excess rooftop solar energy for use later in the day. During a grid outage, the inverter and battery supply the circuits included in the backup configuration.
Typical backup loads can include:
Actual runtime depends on usable battery capacity, connected loads, inverter efficiency, battery temperature and available solar generation.
The battery was inspected and tested against the approved electrical, mechanical and communication specifications before shipment.
Factory testing included:
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The completed home energy storage system stores rooftop solar energy and provides backup power for the household circuits included in the project configuration.
Smart BMS monitoring and inverter communication allow suitable charging and discharging limits to be applied. The modular battery design also allows additional storage capacity to be considered if household energy demand increases.
System performance and backup runtime depend on the final battery capacity, inverter output, connected loads and available solar charging.
With more than 20 years of battery manufacturing experience, we support energy storage brands, distributors, solar equipment suppliers and system integrators with custom residential LiFePO4 battery systems.
OEM and ODM options include:
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Battery capacity depends on daily energy consumption, circuits included in the backup system, required runtime, usable battery percentage, inverter efficiency and available solar charging.
Only when the battery, inverter and electrical system are sized for the combined load. High-power equipment such as electric heating, air conditioning and large pumps may require additional inverter and battery capacity.
Selected configurations support CAN or RS485 communication with compatible hybrid inverters. Compatibility depends on the inverter model, firmware, BMS protocol and cable configuration.
Selected modular battery systems support parallel expansion. The maximum number of batteries and communication arrangement should be confirmed before installation.
The existing inverter can be retained if its voltage, communication protocol, charging limits and battery compatibility are suitable for the proposed LiFePO4 battery system.
Yes. OEM options can include custom capacity, enclosures, Smart BMS settings, communication protocols, product labels and customized packaging.
Please provide the required battery capacity, inverter model, household loads, installation type, available space, communication protocol, backup-time requirement and estimated order quantity.
Send us the required battery capacity, inverter model, household loads, available installation space, communication requirements, backup time and estimated order quantity.
Our engineering team will review the requirements and recommend a suitable LiFePO4 home battery configuration for sample development or volume production.
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