Cited sources
Last verified 2026-09-25.
- BIWATT's datasheet lists the Battery R2 as a sodium-ion battery: a 4.5 kWh stacked module with a 45 V rated voltage.
- BIWATT's June 2026 release refers to it as the PowerNest R2 and says it has entered commercial delivery across international markets.
- It cannot be scored yet because the datasheet gives no warranty terms, no round-trip efficiency and no continuous power rating in kW, and its only certification entry is a CE line citing EN IEC 61000-6 and EN 62619, with no certificate number or listing.
- The 5,000 cycle figure is marked with an asterisk and is stated only under set test conditions (25±2°C, 0.5C/0.5C, 80% depth of discharge); it is not a warranty term.
- This page is not joined to any other scored or evidence record.
- BIWATT Battery R2 (PNR-4.5-02) datasheethttps://www.biwattpower.com/static/policy/Datasheet-BIWATT-PowerNest-sodium-ion-battery-R2-EN.pdf
BIWATT's own datasheet prints the identity Battery R2 (PNR-4.5-02) and lists a sodium-ion 4.5 kWh stacked module with its cycle life test conditions and a CE certification line.
- BIWATT press release, 24 June 2026 (PR Newswire Asia, 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
BIWATT's official release calls the product PowerNest R2 and says it has entered commercial delivery across international markets.