Cited sources
Last verified 2026-09-25.
- Biwatt's release describes the W1, listed together with the W1 Pro, as an all-in-one sodium-ion unit.
- The release, dated 28 November 2024 and issued for Solar Solutions Dusseldorf, lists the W1 among Biwatt's key products and gives no launch date, price or availability for it.
- Biwatt says it scaled commercial deployment of its sodium-ion storage systems across Europe, Asia-Pacific and North America in 2024, but that statement covers its range in general, not the W1 specifically.
- It cannot be scored yet: the release gives no capacity, inverter rating, efficiency, cycle life, warranty terms or certification listing, and no official datasheet could be read.
- No model code beyond the name W1 is printed, and nothing on this page applies to the W1 Pro.
- Biwatt official press release via PR Newswire, 28 November 2024https://www.prnewswire.com/news-releases/biwatt-showcases-advanced-sodium-ion-energy-solutions-at-solar-solutions-dusseldorf-302318128.html
Biwatt's own release, issued for Solar Solutions Dusseldorf, lists the W1 as an all-in-one sodium-ion unit and describes its 2024 sodium-ion deployment.