0086 13923720280
7.7kWh Sodium-Ion Battery 51.3V 150Ah for Home Solar Energy Storage
7.7kWh Sodium-Ion Battery for Residential Energy Storage
The GSL ENERGY LL-WL-7.7K is a next-generation low-voltage sodium-ion battery developed for residential solar energy storage, home backup power, and off-grid energy systems.
With 7.7kWh nominal energy, 51.3V nominal voltage, and 150Ah capacity, the battery provides a practical alternative to conventional lithium-based residential storage for applications where low-temperature performance, long cycle life, and high charge/discharge capability are important.
The battery supports a maximum charging and discharging current of 150A, with maximum power up to 8kW. Its modular architecture allows up to 16 batteries in parallel, expanding total storage capacity to approximately 123kWh for larger homes, villas, small commercial sites, and off-grid energy systems.
Key Advantages of the LL-WL-7.7K Sodium-Ion Home Battery
A 51.3V low-voltage sodium-ion battery designed for residential solar energy storage, backup power, off-grid systems, and cold-climate applications.
51.3V Sodium-Ion Home Battery
The LL-WL-7.7K is a 51.3V, 150Ah sodium-ion battery designed for low-voltage residential energy storage systems. With 7.7kWh of nominal energy, it can work with compatible 48V-class hybrid inverters for home solar storage, photovoltaic self-consumption, backup power, and off-grid energy systems.
Discharge Operation Down to -40°C
Low-temperature performance is one of the key advantages of the LL-WL-7.7K sodium-ion battery. It supports charging from -20°C to 70°C and discharge operation from -40°C to 70°C. The battery maintains at least 93% capacity retention at -30°C under specified conditions, making it suitable for cold-region homes, cabins, farms, and remote solar energy storage projects.
10,000+ Designed Cycles
The sodium-ion battery is rated for at least 10,000 cycles under test conditions of 25±2°C, 0.5C charging, 0.5C discharging, and 80% end-of-life capacity. Combined with a 10-year warranty, the LL-WL-7.7K is designed for frequent solar charging and long-term residential battery energy storage.
150A Charge & Discharge | Up to 8kW
The LL-WL-7.7K supports up to 150A charging current and 150A discharging current, with maximum battery power of 8kW. This high-current capability supports residential backup power, solar energy storage, and variable household loads. Actual output depends on the inverter, wiring, battery condition, and complete system configuration.
Expandable from 7.7kWh to Approximately 123kWh
Up to 16 LL-WL-7.7K batteries can be connected in parallel, expanding nominal battery storage capacity from 7.7kWh to approximately 123kWh. Homeowners, installers and solar system integrators can configure battery capacity according to photovoltaic system size, electricity consumption, backup duration and future expansion requirements.
Up to 100% Depth of Discharge
The LL-WL-7.7K supports a maximum depth of discharge of 100%, allowing a high proportion of the battery's nominal energy to be available for residential solar storage and backup applications when permitted by the complete system operating strategy.
BMS, WiFi, Bluetooth, CAN & RS485
Each battery integrates an independent BMS for intelligent battery management. CAN and RS485 provide communication with compatible hybrid inverters, while Bluetooth, WiFi, LCD and LED functions provide convenient access to battery operating information and system status.
IP65 Enclosure & Aerosol Fire Protection
The IP65-rated floor-standing Power Tower enclosure helps protect the internal battery system against dust and water ingress. An integrated aerosol fire extinguishing system adds another layer of battery protection for residential energy storage installations.
Where Can the 7.7kWh Sodium-Ion Battery Be Used?
Designed for residential solar energy storage, backup power, off-grid systems and cold-climate applications, the LL-WL-7.7K provides a flexible low-voltage battery platform for different energy storage requirements.
Residential Solar Energy Storage
Store excess photovoltaic energy generated during the day and use it later in the evening or at night. The 7.7kWh sodium-ion battery can be integrated with compatible hybrid inverters to increase residential solar self-consumption.
Home Backup Power
Pair the battery with a compatible hybrid inverter to provide stored energy for selected household loads during utility outages or unstable grid conditions. The battery supports up to 150A discharge current and maximum power up to 8kW.
Cold-Climate Energy Storage
With a specified discharge operating range down to -40°C and at least 93% capacity retention at -30°C under specified conditions, the LL-WL-7.7K is particularly suited to residential and distributed energy storage projects in cold-weather regions.
Off-Grid Solar Systems
Combine solar PV, a compatible hybrid inverter and sodium-ion battery storage to support cabins, rural homes, farms and other locations where reliable utility power may be unavailable or limited.
Villas & Large Residential Systems
Start with 7.7kWh and expand the battery system as energy requirements grow. Up to 16 batteries can be connected in parallel, providing approximately 123kWh of nominal energy storage capacity for larger residential systems.
Small Distributed Energy Storage
The scalable low-voltage sodium-ion battery platform can also support selected small distributed energy storage applications where modular capacity, high-current capability and low-temperature operation are required.
Choosing the Right Sodium-Ion Battery Configuration
Battery capacity should be selected according to daily electricity consumption, photovoltaic system size, peak load, required backup duration, inverter power, operating temperature, and future expansion requirements. For multi-battery systems, inverter compatibility, communication protocol, and system configuration should be confirmed before installation.
LL-WL-7.7K Sodium-Ion Battery Specifications
51.3V 150Ah low-voltage sodium-ion battery with 7.7kWh nominal energy, 150A charge and discharge capability, IP65 protection and scalable residential energy storage capacity.
| Battery Specifications | |
|---|---|
| Model | LL-WL-7.7K |
| Battery Chemistry | Sodium-Ion |
| Nominal Voltage | 51.3V |
| Rated Capacity | 150Ah |
| Nominal Energy | 7.7kWh |
| Operating Voltage Range | 40–60V DC |
| Maximum Charging Voltage | 60V DC |
| Maximum Charging Current | 150A |
| Maximum Discharging Current | 150A |
| Maximum Power | 8kW |
| Depth of Discharge | Max. 100% DoD |
| Cycle Life | ≥10,000 Cycles* |
| Parallel Connection | Up to 16 Units / Approx. 123kWh |
| Communication | RS485 / CAN / BLE / WiFi |
| Display | LCD + LED |
| Charging Temperature | -20°C to 70°C |
| Discharging Temperature | -40°C to 70°C |
| Storage Temperature | -20°C to 40°C |
| Protection Rating | IP65 |
| Installation | Floor-Standing / Power Tower |
| Dimensions | 435 × 1080 × 287mm |
| Weight | Approx. 118kg |
| Maximum Altitude | < 4,000 m |
| Warranty | 10 Years |
| Certifications / Documents | CB IEC 62619 / CE / UN38.3 / MSDS |
Designed for Low-Voltage Solar Energy Storage Systems
Before system configuration, confirm the hybrid inverter voltage range, maximum battery charge and discharge current, CAN/RS485 communication protocol, required storage capacity, and local installation requirements. Contact GSL ENERGY for battery and inverter compatibility or project-level configuration support.
Frequently Asked Questions About the 7.7kWh Sodium-Ion Battery
Key technical and purchasing questions for residential solar installers, distributors, system integrators and home energy storage projects.
What is the capacity of the LL-WL-7.7K sodium-ion battery?
The LL-WL-7.7K provides 7.7kWh of nominal energy with a 51.3V, 150Ah sodium-ion battery configuration. It is designed as a low-voltage battery platform for residential solar energy storage, backup power, and off-grid applications.
Can this 7.7kWh sodium-ion battery work with a 48V hybrid inverter?
The battery operates within a 40–60V DC voltage range and supports CAN and RS485 communication, so it can be integrated with compatible low-voltage hybrid inverter systems. Before installation, the inverter voltage range, battery current limit and communication protocol should be confirmed.
How does the sodium-ion battery perform in cold weather?
The LL-WL-7.7K is specified for charging from -20°C to 70°C and discharging from -40°C to 70°C. The product documentation also states at least 93% capacity retention at -30°C under specified conditions, making the battery suitable for cold-climate residential energy storage.
What is the cycle life of the 7.7kWh sodium-ion battery?
The LL-WL-7.7K is rated for at least 10,000 cycles under specified test conditions of 25±2°C, 0.5C charging, 0.5C discharging, and 80% end-of-life capacity. Actual service life depends on temperature, depth of discharge, charge/discharge rate, and system operation.
How much power can the LL-WL-7.7K deliver?
The battery supports up to 150A charging current and 150A discharging current, with a maximum battery power of 8kW. Final system output depends on the hybrid inverter, wiring, battery operating conditions, and complete system configuration.
How many LL-WL-7.7K batteries can be connected in parallel?
Up to 16 batteries can be connected in parallel, expanding nominal storage capacity from 7.7kWh to approximately 123kWh. This allows installers and homeowners to start with a smaller battery system and expand capacity as electricity demand grows.
Does the battery support 100% depth of discharge?
Yes. The LL-WL-7.7K specification lists a maximum depth of discharge of 100%. Actual operating strategy may still be adjusted according to system design, inverter settings, battery life objectives, and application requirements.
Is the sodium-ion battery suitable for outdoor installation?
The LL-WL-7.7K enclosure is rated IP65, protecting against dust and water ingress. The final installation location should still follow the installation manual, local electrical codes, and project environmental requirements.
What communication options are available?
The battery supports RS485, CAN, Bluetooth (BLE), and WiFi communication. It also includes LCD and LED display functions for battery operating information and system status.
What certifications and documents are available for the LL-WL-7.7K?
The product documentation lists CB IEC 62619, CE, UN38.3, and MSDS. Buyers should confirm the certification requirements for their target market and project before placing an order.
Is this sodium-ion battery suitable for solar energy storage?
Yes. The LL-WL-7.7K can be used in residential solar energy storage, photovoltaic self-consumption, backup power and off-grid systems when matched with a compatible hybrid inverter. Its scalable design also allows larger storage configurations for villas and high-consumption homes.
What information is needed to select the right battery configuration?
For accurate system selection, provide the installation country, daily electricity consumption, peak load, photovoltaic system size, hybrid inverter model, required backup duration, operating temperature, and expected battery capacity. These details help determine the appropriate number of batteries and system configuration.
Need Help Configuring a Sodium-Ion Home Battery System?
Send us your country, inverter model, solar PV size, required battery capacity, and application. GSL ENERGY can help evaluate the appropriate battery configuration for residential solar storage, backup power, or off-grid projects.
Get a Battery Configuration
Email: sales@gsl-energy.com
Tel: +86 755 84515360
Address: A602, Tianan Cyber Park, Huangge North Road, Longgang District, Shenzhen, China0086 13923720280