Cited sources
Last verified 2026-10-06.
- Legal manufacturer as printed: Dongguan Lithium Valley Energy Co. Ltd.
- The maker describes the W8-5C as a wall-mounted home battery that uses sodium-ion (Na-ion) technology.
- It appears as a product listing in the maker's catalogue, and the page gives no price, availability, launch date or sales market, so its market status is unclear.
- The current product page calls 7.68 kWh usable energy, while the V1.2 sheet labels 7680 Wh as Energy without an explicit usable-energy boundary. The page claims 8,000 cycles and the sheet claims 9,000 cycles, both at 80% depth of discharge, 25°C and 0.5C. This conflict remains unresolved; neither supplies a retained-capacity endpoint. These are maker claims, not independent lifetime results.
- It cannot be scored yet: governing warranty terms, battery round-trip efficiency and an exact certification listing remain unresolved. Continuous current is now documented; the nominal DC power calculation and its limits are explained below. UL1973 is listed without a certificate number.
- This record is not joined to any other battery record, including products with similar headline figures.
- The exact W8-5C datasheet is printed V1.2, with no printed revision date established. Its electrical table specifies 48 V nominal voltage, 160 Ah rated capacity and 32.0 to 55.2 V operating voltage. Standard charge and discharge current is 80 A; maximum continuous charge and discharge current is 200 A.
- At nominal DC voltage, 48 V × 200 A ÷ 1000 gives a calculated 9.6 kW continuous-current power basis. This is a reproducible nominal DC derivation, not an explicit maker kW rating, AC output or surge rating. It does not establish fixed power throughout the operating-voltage or temperature range, or a guaranteed runtime.
- The V1.2 sheet labels 99% as conversion efficiency at 25°C and 0.5C, without establishing the energy boundary or test protocol. It must not be used as battery round-trip efficiency. A governing warranty instrument and an exact certification listing remain unresolved; the “10 Year Safe” headline is not warranty terms.
- The sheet states IP65, charging at 0 to 55°C and discharging at -40 to 60°C, with installation indoors or under outdoor eaves, wall-mounted or floor-standing. It lists RS232, CAN and RS485, Bluetooth and an aerosol fire-extinguishing device. These are maker disclosures, not proof of independent fire testing, unrestricted outdoor use or any cloud/API integration.
- The sheet lists UN38.3, MSDS, Marine Report and UL1973 without an exact certificate number. Unless otherwise specified, its data come from the maker’s laboratory and may vary with environment; specifications may change. Independent performance, local approval and governing service obligations are not established by these headings.
- Lithium Valley W8-5C product pagehttps://lithiumvalley.com/product/w8-5c-%EF%BC%88wall-mounted-sodium-ion-home-battery%EF%BC%89/
The maker's product page prints the name and model code, describes the sodium-ion chemistry, and lists the energy, cycle-life and certification claims.
- Lithium Valley products cataloguehttps://www.lithiumvalley.com/products/
The maker's catalogue lists the W8-5C among its residential energy storage products and prints the legal company name.
- Lithium Valley W8-5C sodium-ion battery datasheet V1.2https://lithiumvalley.com/download/w8-5c-sodium-ion-battery-datasheet-1-2/
Public download, two pages read and page 2 visually checked on 6 October 2026. No printed revision date established. Explicit 200 A continuous current and 48 V nominal DC support a qualified calculated 9.6 kW basis; cycle, energy and efficiency measurement limits retained.