Cited sources
Last verified 2026-09-25.
- Seplos describes the Mason-210N as a sodium-ion battery pack for household off-grid systems, rated 49.6 V nominal, 210 Ah and 10.416 kWh.
- The maker's page lists it as orderable with a minimum order of one unit and a 30-day stock time, shows no price, gives China as the place of origin and names no sales market.
- It cannot be scored yet: the page lists no certifications, no round-trip efficiency, no throughput or retained-capacity warranty terms beyond a stated 10-year warranty, and links no datasheet for this model.
- The pack is rated IP20 and weighs about 100 kg, and the 4000-cycle figure is a maker test result at 25 C and 80% depth of discharge to 70% end of life, with no warranty terms given for it.
- The page does not print a legal manufacturer name, and this record is not joined to any scored or evidence record.
- Seplos product page: Mason-210N sodium-ion battery packhttps://www.seplos.com/seplos-48v-210ah-10kwh-sodium-batteries-pack.html
Seplos's own page prints the product title, model code Mason-210N, sodium-ion chemistry, ratings, IP20, the 10-year warranty line, order terms and place of origin.