The item in the image is a Dawnice Lithium Solar Battery energy storage system, likely a 20kWh model.
Capacity: Offers large storage capacity, commonly available in 5kWh, 10kWh, 15kWh, and 20kWh configurations.
Voltage: Operates at 51.2V.
Technology: LiFePO4 (Lithium Iron Phosphate) battery chemistry.
Features: Includes a built-in Battery Management System (BMS), high charging/discharging efficiency (around 95%), and a long cycle life.