Fox G-Max Plus All in One, 125kW with 241kWh

The Fox ESS G-Max Plus (GM241kWh-125kW-H) is an all-in-one commercial and industrial energy storage system, integrating a 241kWh LFP battery, built-in PV inverter, BMS and liquid-cooled thermal management into a single outdoor container. It accepts up to 250kW of PV array across eight MPP trackers and delivers 125kW of nominal AC output (137.5kVA max) at a round-trip efficiency up to 89.5%, with a rated cycle life of 8,000 cycles. The battery operates over a 672-876V range and supports direct connection to PV, grid, backup load and a generator, with seamless switching under 10ms between on-grid and off-grid modes. Multiple operating modes are supported, including peak shaving, load shedding, PV-storage energy control and frequency regulation, with data sent to Fox ESS Cloud over Ethernet or 4G. It is designed for commercial and industrial solar-plus-storage projects.