Sodium-ion energy storage leads BIWATT’s latest product news at Intersolar Europe 2026. The company introduced two new batteries on June 24, 2026, in Munich. First, it launched the PowerNest R5 for residential use. Next, it unveiled the PowerLake I3 for commercial and industrial use. Together, these products expand BIWATT’s sodium-ion portfolio for fast-growing energy storage markets.
Moreover, BIWATT kept the launch focused on practical energy needs. The company designed the new systems for homes, businesses, and distributed energy projects. As a result, the new lineup supports solar-plus-storage, backup power, and flexible deployment across different settings.
BIWATT sodium-ion energy storage expands with R5 and I3
BIWATT built both batteries on its dedicated sodium-ion platform. Unlike many battery brands, the company does not rely only on system-level integration. Instead, it works at the cell level from the start. That approach helps BIWATT define performance, safety, and reliability targets early in development.
Because of that strategy, BIWATT created a battery platform tailored for energy storage. The company says this platform supports long-term product consistency and better optimization for real applications. In addition, it gives BIWATT more control over battery behavior, intelligent management, and system integration.
The latest launch also builds on earlier products. BIWATT previously introduced the rack-mounted PowerNest R2 and the stackable PowerNest R3. Both batteries have already entered commercial delivery in international markets. Therefore, the R5 and I3 mark the next step in BIWATT’s sodium-ion energy storage rollout.
PowerNest R5 brings sodium-ion energy storage to homes
The PowerNest R5 targets residential energy storage. BIWATT designed it for homeowners who want modular scalability and smart battery performance. The company also added intelligent battery optimization and active balancing technology.
These features matter for residential users. For example, modular scalability can help match storage capacity to household demand. Likewise, intelligent optimization can improve daily operation with solar systems and backup use. Active balancing also supports consistent battery performance across the system.
Furthermore, BIWATT positions the R5 as part of a broader home energy ecosystem. The company develops battery systems, sodium-ion-optimized inverters, in-house battery management systems, cloud tools, and app-based controls. As a result, the R5 fits into a more connected residential storage setup.
PowerLake I3 extends sodium-ion energy storage to C&I markets
The PowerLake I3 focuses on commercial and industrial energy storage. BIWATT designed it for customers who need flexible installation and smart maintenance tools. Therefore, the system fits a wide range of projects, from backup power to distributed energy deployments.
In addition, the I3 supports solar-plus-storage applications. That makes it relevant for sites that want to manage energy use more efficiently. It also suits businesses that need dependable storage alongside on-site generation.
Commercial customers often value flexibility and visibility. BIWATT addresses both needs with the I3. The company highlights flexible deployment options and intelligent maintenance capabilities. Consequently, operators can adapt the battery to different project sizes and management needs.
BIWATT sodium-ion energy storage strategy centers on cell-level design
At the product launch, BIWATT CEO Owen explained the company’s development approach. He said energy storage requires more than choosing a battery chemistry. Instead, BIWATT focuses on cell-level innovation and application-specific engineering. That message reinforces the company’s strategy across its sodium-ion lineup.
This product philosophy sets the tone for the R5 and I3. Rather than treating the battery as a standard component, BIWATT shapes the technology around energy storage requirements. As a result, the company aims to align chemistry, safety, control systems, and real-world use cases.
Notably, BIWATT continues to invest in international market readiness. The company is progressing UL1973 certification and UL9540A testing for its Sodium-ion Battery products. These steps support future expansion and reflect BIWATT’s focus on recognized safety standards.
BIWATT sodium-ion energy storage gains global traction in 2026
BIWATT says its sodium-ion products now operate in more than 20 countries. Most deployments are in Europe. Even so, the company’s international footprint shows growing commercial interest in sodium-ion energy storage in 2026.
The launch at Intersolar Europe 2026 also strengthens BIWATT’s position in the market. The event gave the company a timely stage to present its latest residential and commercial systems. Meanwhile, the addition of the R5 and I3 broadens its offering across key customer segments.
Overall, BIWATT’s new batteries show a clear product expansion strategy. The PowerNest R5 serves residential users with modular and intelligent storage features. The PowerLake I3 addresses commercial and industrial demand with flexible deployment and smart maintenance support. Together, they deepen BIWATT’s sodium-ion energy storage portfolio and extend its reach across global energy storage applications.
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