The new PowerNest R5 Series features a wire-free, stackable architecture utilizing NFPP sodium-ion chemistry. It is available as a standalone battery pack or as an all-in-one system with an integrated single-phase hybrid inverter.
Chinese energy storage system manufacturer Biwatt has introduced a 58 V modular sodium-ion residential storage system for residential applications.
The Nest R5 Series is based on sodium iron pyrophosphate (NFPP) chemistry and spans two configurations: the all-in-one PowerNest R5i, which integrates battery modules with a single-phase hybrid inverter, and the standalone PowerNest R5, designed for compatibility with third-party hybrid inverter ecosystems.
Both variants share a wire-free, stackable architecture intended to eliminate inter-module cabling, simplify installation, shorten commissioning time, and reduce the risk of wiring-related errors in the field, according to the company.
Each floor-standing module provides 4.5 kWh of capacity using 170 Ah NFPP sodium-ion cells, delivering a cycle life of up to 8,000 cycles at 25 C under 0.5C/0.5C conditions and 80% depth of discharge. The system operates at 58 V, with 3 kW continuous power output and a maximum current of 55 A per module.
