Cited sources
Last verified 2026-09-25.
- BIWATT describes the PowerNest R3 as a stackable sodium-ion battery.
- In its June 2026 release, BIWATT says the R3 has entered commercial delivery and that its sodium-ion products are deployed in more than 20 countries, mainly in Europe.
- It cannot be scored yet because the release gives no capacity, cycle life, efficiency, power or warranty terms for the R3, and no official datasheet could be read.
- BIWATT says UL1973 certification and UL9540A testing for its sodium-ion products are still in progress, so no completed certification listing for the R3 is recorded here.
- The release headline describes the R5 and I3 as UL certified; it makes no such claim for the R3.
- This page is not joined to any scored or evidence record.
- BIWATT press release via PR Newswire, 24 June 2026https://www.prnewswire.com/news-releases/biwatt-expands-sodium-ion-energy-storage-portfolio-with-ul-certified-nfpp-based-r5-and-i3-batteries-302808538.html
BIWATT's own release names the stackable PowerNest R3 sodium-ion battery, says it has entered commercial delivery, says its sodium-ion products are deployed in more than 20 countries mainly in Europe, and says UL1973 certification and UL9540A testing are in progress.
- Same BIWATT release on PR Newswire APAC (Source: Biwatt)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 APAC copy of the release, marked as sourced from Biwatt, prints the same PowerNest R3 name and commercial delivery statement and describes BIWATT's sodium-ion range as covering residential uses.