The document provides specifications for the Alpha ESS M4856-S modular battery. It has a usable capacity of 2.6 kWh, nominal voltage of 51.2V, and depth of discharge of 90%. The battery modules can be connected in series and are available in energy capacities ranging from 2.9 to 23 kWh. It has an operating temperature range of -10 to 50 degrees Celsius and IP21 or IP65 protection rating depending on indoor or outdoor use.