Shenzhen Biwatt Technology Co., Ltd. (Biwatt), established in 2017 and headquartered in Shenzhen, China, is an innovator in digital green power with a significant role in sodium-ion battery technology. The company develops sustainable energy solutions through its research and development capabilities, product portfolio, and integrated energy management systems. Biwatt specializes in smart energy storage systems (ESS), hybrid inverters, battery management systems (BMS), and an energy cloud platform. These systems integrate technologies such as 5G, IoT, and power electronics to enhance energy efficiency and reliability across residential, commercial, and industrial markets.
Biwatt aims to become a recognized brand that delivers customer value, promotes innovation, and contributes to a zero-carbon society. The company operates two independent research and development centers and manufacturing facilities in China, with products deployed in over 50 countries as of 2022.
Battery Technology
Biwatt advances the commercial application of sodium-ion batteries, which offer advantages over lithium-ion chemistries. This technology emphasizes safety, environmental aspects, and performance.
Key features of Biwatt’s sodium-ion battery technology include:
- Safety: These cells are thermally stable, reducing fire risks.
- Temperature Performance: They operate consistently between -30°C and 55°C, making them suitable for varied climates.
- Environmental Considerations: The use of abundant sodium lessens resource strain compared to lithium mining.
- Cycle Life: Battery systems are designed for 3,000 to 5,000 cycles at high depths of discharge, supporting durability.
Products incorporating this technology include:
- PowerNest (Residential ESS): These are modular and scalable systems, starting at 4.5 kWh, featuring compact designs for indoor/outdoor use, and integrating with solar PV for home energy independence.
- PowerLake (Commercial & Industrial ESS): High-capacity systems, such as the 155 kWh PowerLake I2, combine energy storage and inverters in an all-in-one cabinet. They offer rapid off-grid switching (under 20 ms) and maintain performance at altitude and in varied temperatures.
- PowerCircle (Mobility & Starter Batteries): This line includes sodium-ion 12V batteries ranging from 40–100Ah, suitable for short-range EVs, electric motorcycles, golf carts, and backup power.
- M2 Portable Power: These solutions are designed for outdoor use, tool powering, and low-temperature environments.
Biwatt also develops hybrid inverters compatible with both sodium-ion and lithium-ion batteries. Their energy cloud platform provides remote diagnostics, real-time monitoring, and optimization, facilitating digital energy management.
Recent Projects
Biwatt introduced significant products in 2025:
- PowerLake I2 (155 kWh Commercial Sodium-Ion ESS): Launched in May 2025, this system integrates sodium-ion battery packs with inverters within a thermally stable, IP54-rated cabinet. It operates reliably in challenging conditions and switches to off-grid mode in under 20 milliseconds. The system targets a long cycle life (up to 6,000 cycles at 80% DoD).
- PowerNest R3 (Residential Sodium-Ion ESS): This floor-standing, IP65-rated 4.5 kWh modular battery is scalable up to 72 kWh. It is designed to withstand wide temperature and humidity ranges and supports 0V charging/discharging for enhanced safety. The PowerNest R3 is intended for home and small commercial use, with a 5,000-cycle warranty.
Biwatt displayed its sodium-ion product line at Intersolar Europe 2025 in Munich, demonstrating its progress in safer battery technologies.
Investors
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Business Details
Location: Shenzhen, China
Website: https://www.biwattpower.com/
LinkedIn: https://www.linkedin.com/company/90739600
