Cited sources
Last verified 2026-09-25.
- BIWATT describes the PowerLake I3 as a commercial and industrial storage battery; the release headline calls it NFPP-based sodium-ion, and the company says it takes part in cell-level development.
- BIWATT unveiled it at Intersolar Europe 2026 in Munich in a release dated 24 June 2026; the release does not say it is available or shipping, and only the earlier PowerNest R2 and R3 are described as in commercial delivery.
- The release headline calls the I3 UL-certified, but its body says UL1973 certification and UL9540A testing are still in progress, so this record does not treat it as UL-certified.
- It cannot be scored from this release, which gives no capacity rating, efficiency, cycle rating, warranty terms or certification listing.
- It is aimed at commercial and industrial use, not as a home battery, and the release prints no model code beyond the product name.
- BIWATT press release via PR Newswire (24 June 2026)https://www.prnewswire.com/news-releases/biwatt-expands-sodium-ion-energy-storage-portfolio-with-ul-certified-nfpp-based-r5-and-i3-batteries-302808510.html
BIWATT's own release, marked as provided by Biwatt, names the PowerLake I3 as an NFPP sodium-ion commercial and industrial storage battery and says UL1973 certification and UL9540A testing are still in progress.
- BIWATT press release via PR Newswire APAC (24 June 2026)https://en.prnasia.com/releases/apac/biwatt-expands-sodium-ion-energy-storage-portfolio-with-ul-certified-nfpp-based-r5-and-i3-batteries-538379.shtml
The same release, with Biwatt named as the source, records that the PowerLake I3 was unveiled at Intersolar Europe 2026 in Munich.