Huawei's Smart String Grid-Forming ESS ensures robust protection through five layers of integrated safety design, from individual cells, battery packs, racks, systems, and the grid. This 110kV power grid is made up of a 400MW PV array and 1. 3GWh energy storage system. The ESS is a prefabricated all-in-one energy storage system with a modular structure, integrated power supply and distribution cabling, monitoring functions, environmental sensors and fire protection. The energy storage system is essentially a straightforward plug-and-play system which consists of a lithium LiFePO4 battery pack, a lithium solar charge controller, and an inverter for the voltage requested. Price for 1MWH Storage Bank is $774,800 each plus freight shipping from.