Huawei unveils 20 kW all-in-one residential energy storage system
Huawei introduced the Luterra S2, an integrated residential energy storage system combining inverters, LFP batteries, and AI energy management, with modular capacities up to 336 kWh.
Huawei launched the Luterra S2, an all-in-one residential energy storage system integrating a hybrid inverter, lithium iron phosphate batteries, and AI-based energy management software. The system supports single-phase inverters from 3 kW to 10 kW and three-phase units from 5 kW to 20 kW, with up to three inverters connectable in parallel for a combined output of 60 kW. Battery modules are available in 5.02 kWh and 7.03 kWh nominal capacities, with usable capacities of 4.9 kWh and 6.9 kWh, respectively. Both modules measure 590 mm × 255 mm × 290 mm and weigh 46 kg and 57 kg.
The LFP batteries feature integrated energy optimizers and are designed for a service life exceeding 15 years, with Huawei claiming lifetime usable energy throughput of up to 5 MWh per kWh of capacity. Inverters use silicon carbide power electronics and ANPC topology, achieving maximum efficiencies of 98.6% for single-phase and 99% for three-phase models. Maximum PV input voltages are 600 V for single-phase and 1,100 V for three-phase units, with up to three MPPTs and an input current of up to 18 A per tracker.
For backup applications, the system offers a switchover time of less than 10 milliseconds and supports continuous off-grid loads of up to 20 kW. The 20 kW three-phase inverter can deliver peak backup output of up to 40 kW for 10 seconds. The Luterra S2 operates passively cooled with noise levels below 29 dB and functions in ambient temperatures from –25 C to 60 C, featuring an IP66-rated enclosure and corrosion protection up to C5-M.
Huawei’s AI Energy Management 2.0 platform optimizes energy flows using weather forecasts, tariffs, consumption data, and battery status, supporting virtual power plant participation. Connectivity includes EEBUS, SG Ready, OCPP, and Modbus TCP, with additional features such as an AI assistant, 3D modeling tools, and remote diagnostics. The system incorporates cell-level thermal isolation, pressure relief, smoke evacuation, and continuous temperature monitoring, alongside TÜV Rheinland safety testing and UL 9540A validation.