SolarEdge launches Nexis residential storage system with modular high-voltage battery

SolarEdge has launched a new residential inverter and storage solution called Nexis, combining a configurable hybrid inverter with a modular high-voltage battery for home solar systems. The company said the system is designed to simplify product selection and installation while increasing charging and discharging performance.

According to pv magazine Germany, the Nexis inverter uses what SolarEdge describes as a multi-range concept, with a single device covering multiple power classes instead of requiring separate models. The AC nominal output can be set in six steps from 8 kW to 20 kW. SolarEdge said DC oversizing of up to 200% is possible, and that the inverter uses silicon carbide power electronics, with a European weighted efficiency of 98.4% to 98.75%.

The inverter is fanless, operates at under 40 decibels, and is rated IP65 for outdoor installation. SolarEdge said it can operate in temperatures from minus 40 C to 60 C. A key feature is integrated backup power, with the inverter able to provide three-phase backup of up to 20 kW at either 230 V or 400 V, with switchover in less than 50 milliseconds in the event of a grid outage.

Alongside the inverter, SolarEdge introduced a new residential battery developed specifically for Nexis. The company said it is using a single battery variant across single-phase and three-phase systems, as well as AC- and DC-coupled applications. Each battery module provides 4.9 kWh of capacity, with a single stack expandable to 20 kWh and parallel operation allowing systems of up to 78 kWh.

SolarEdge said the new battery significantly increases charging and discharging power compared with previous systems. Each battery stack can deliver up to 14 kW, versus around 5 kW in earlier products, while a further increase to 28 kW is planned for the third quarter of 2026. The company said the higher charging power is aimed particularly at capturing midday solar peaks.

Each battery module includes its own DC-DC converter, which SolarEdge said allows monitoring and optimisation at module level, module replacement, and later system expansion. The company added that this architecture can improve efficiency by up to 30% under partial-load operation. The battery is rated IP65, carries a 10-year warranty, and, according to SolarEdge, can withstand flooding for up to 72 hours in water depths of as much as 37 cm.

SolarEdge also said it has simplified installation by allowing commissioning without opening the inverter, with communication ports accessible externally. Additional features include an integrated antenna, lever-clamp AC connections, and EEBus-based heat pump integration, with existing support for Vaillant and planned integrations including Nibe, Bosch, Buderus, and Wolf. Device pairing and system data are handled through the SolarEdge Go app.

From pv magazine Germany.