We Provide Innovative Solar Energy Solutions

High-Capacity 18kWh Home Energy Storage Solution

The Sunjoy Energy SJ-HE-18K-48M is an 18kWh 48V low-voltage lithium battery designed for modern residential energy storage applications.

It can be integrated with solar PV systems and compatible hybrid or off-grid inverters to store excess solar energy during the daytime and provide power to household loads when solar generation is insufficient or when the grid is unavailable.

With its large 18kWh storage capacity, the battery is suitable for homes, villas, residential solar systems, backup power applications and other distributed energy storage projects.

EVE LF356 356Ah Battery Cells

The SJ-HE-18K-48M uses EVE LF356 356Ah LiFePO4 cells configured in a 16P battery configuration.

The high-capacity cell design helps provide a compact and scalable solution for residential energy storage while supporting stable daily charging and discharging operation.

Up to 8,000+ Cycles

The battery is designed for a cycle life of up to 8,000+ cycles under specified operating conditions.

Its long cycle life makes the SJ-HE-18K-48M suitable for daily solar energy storage, solar self-consumption, backup power and other frequent charge/discharge applications.

PACE Intelligent BMS

The battery is equipped with a PACE intelligent Battery Management System (BMS) with up to 200A over-current capability.

The BMS monitors and manages important battery operating parameters and provides battery protection functions during charging and discharging.

Multiple communication protocols are supported, making system integration with compatible hybrid, off-grid and solar inverters easier.

Compatible with 99%+ of Mainstream Inverters

The SJ-HE-18K-48M supports multiple communication protocols and is designed to be compatible with 99%+ of mainstream inverter brands.

This broad compatibility makes the battery suitable for solar installers and distributors who work with different inverter brands and system architectures.

Actual compatibility should be confirmed according to the specific inverter model, communication protocol and system configuration.

Up to 15 Batteries in Parallel

The SJ-HE-18K-48M supports up to 15 battery units connected in parallel.

This allows system integrators and homeowners to expand total storage capacity according to their energy consumption and backup power requirements.

The scalable parallel architecture is particularly suitable for larger residential energy storage systems and customized solar battery projects.

3.2-Inch Touchscreen

A built-in 3.2-inch touchscreen provides a convenient interface for monitoring battery information and operating status.

The integrated display makes it easier for installers, maintenance personnel and end users to check important system information.

IP54 Protection – IP65 Available

The standard SJ-HE-18K-48M enclosure is rated IP54.

For customers requiring enhanced protection for outdoor or more demanding installation environments, IP65 protection can be customized according to project requirements.

5-Year Standard Warranty

Sunjoy Energy provides a standard 5-year after-sales warranty for the SJ-HE-18K-48M.

For distributors, installers and project customers who require extended service support, a 10-year after-sales service option can be provided according to the project requirements.

OEM & ODM Energy Storage Battery Manufacturer

Sunjoy Energy is a direct energy storage battery manufacturer providing OEM and ODM services to global distributors, wholesalers, installers and energy storage companies.

Depending on project requirements, we can support customization of:

• Battery housing appearance

• Product dimensions

• Brand logo

• Product labeling

• BMS configuration

• Communication protocols

• Product functions

• Packaging

• System configuration

Our OEM and ODM capabilities allow customers to develop customized home energy storage batteries for specific markets and applications.

18kWh Home Battery Storage Applications

The Sunjoy Energy SJ-HE-18K-48M can be used in a wide range of residential and distributed energy storage applications, including:

• Residential solar energy storage

• Home backup power

• Solar self-consumption

• Hybrid solar energy systems

• Off-grid solar systems

• Grid outage backup

• Solar PV + battery storage

• Villa energy storage

• Residential microgrids

• Peak shaving and energy management

• Small commercial energy storage

• Renewable energy storage

The 48V low-voltage architecture makes the battery suitable for residential solar systems using compatible low-voltage hybrid and off-grid inverters.

Frequently Asked Questions

What is the capacity of the Sunjoy Energy SJ-HE-18K-48M?

The SJ-HE-18K-48M has a rated energy capacity of 18kWh and a nominal voltage of 48V.

What battery cells are used in the 18kWh battery?

The battery uses EVE LF356 356Ah LiFePO4 cells configured in a 16P battery configuration.

What is the cycle life of the battery?

The SJ-HE-18K-48M is designed for up to 8,000+ cycles under specified operating conditions.

Is the 18kWh battery compatible with different inverter brands?

Yes. The battery supports multiple communication protocols and is designed to work with 99%+ of mainstream inverter brands, subject to the specific inverter model and communication protocol.

How many 18kWh batteries can be connected in parallel?

Up to 15 SJ-HE-18K-48M batteries can be connected in parallel for larger energy storage capacity.

Is the battery suitable for outdoor installation?

The standard battery provides IP54 protection. An IP65 version can be customized for customers requiring a higher level of protection.

Does the battery have a built-in BMS?

Yes. The SJ-HE-18K-48M is equipped with a PACE intelligent BMS with 200A over-current capability.

Does the battery have a display?

Yes. The battery has a built-in 3.2-inch touchscreen for convenient system monitoring.

What is the warranty period?

The standard after-sales warranty is 5 years. A 10-year extended after-sales service option is also available according to customer requirements.

Does Sunjoy Energy provide OEM and ODM services?

Yes. Sunjoy Energy is a direct manufacturer and provides OEM and ODM customization services, including product appearance, branding, BMS configuration, communication functions, product functions and packaging.