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Biwatt Power Launches PowerNest R3: A Revolutionary 4.5 kWh Sodium-Ion Battery for Residential Energy Storage

Biwatt Power Launches PowerNest R3: A Revolutionary 4.5 kWh Sodium-Ion Battery for Residential Energy Storage Biwatt

5 min Read

he rapid expansion of renewable energy has spurred demand for reliable, cost‑effective home storage solutions. Sodium‑ion batteries are emerging as a promising contender to traditional lithium‑ion technologies due to their use of abundant raw materials and competitive performance. On 30 April 2025, China’s Biwatt Power unveiled the PowerNest R3—a 4.5 kWh sodium‑ion battery tailored for residential applications.

Sodium-Ion Chemistry and Performance Advantages

The PowerNest R3 leverages sodium-ion technology, which utilizes abundant sodium resources instead of scarce lithium. This chemistry reduces production costs by approximately 30% while maintaining competitive energy density levels.
The battery operates efficiently across a wide temperature range (-30°C to +55°C) without requiring external heating systems, making it ideal for extreme climates.

Compliance with Global Standards

The PowerNest R3 is the first sodium-ion residential battery to achieve CE certification, paving the way for European market adoption. Initial installations in Germany have demonstrated seamless integration with solar PV systems and grid infrastructure.
Engineered for harsh environments, the R3’s IP65-rated enclosure protects against dust ingress and water jets. It withstands humidity levels up to 95%, making it suitable for basements, garages, and outdoor installations

Cost Competitiveness & Sustainability Benefits

At an estimated $3,200 per module, the R3 undercuts lithium-ion alternatives by 20–25%. This pricing strategy aligns with Biwatt’s goal to democratize access to energy storage, particularly in emerging markets where lithium supply chains are underdeveloped.
Sodium-ion batteries eliminate reliance on conflict minerals like cobalt and reduce carbon emissions by 40% during manufacturing compared to lithium iron phosphate (LFP) systems. Biwatt’s partnership with recyclers in the EU ensures 95% material recovery at end-of-life, supporting circular economy principles

Cost Competitiveness & Sustainability Benefits

At an estimated $3,200 per module, the R3 undercuts lithium-ion alternatives by 20–25%. This pricing strategy aligns with Biwatt’s goal to democratize access to energy storage, particularly in emerging markets where lithium supply chains are underdeveloped.
Sodium-ion batteries eliminate reliance on conflict minerals like cobalt and reduce carbon emissions by 40% during manufacturing compared to lithium iron phosphate (LFP) systems. Biwatt’s partnership with recyclers in the EU ensures 95% material recovery at end-of-life, supporting circular economy principles

Conclusion: Redefining Residential Energy Storage

The PowerNest R3 positions Biwatt as a leader in the sodium-ion revolution, offering a compelling alternative to lithium-dominated markets. Its combination of affordability, durability, and environmental credentials addresses critical barriers to energy storage adoption worldwide. As utilities phase out net metering and electricity prices fluctuate, the R3 empowers consumers to take control of their energy futures-one stack at a time.

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