Large-scale lithium battery energy storage systems, such as 500kwh, 1mwh, 2mwh, etc., usually store power when the power is surplus, and output the stored power to the grid through the inverter when the power is insufficient. When the power grid is out of power, the lithium battery energy storage system can act as an independent inverter power supply to provide AC power to important loads, thereby ensuring the needs of users. In areas with high electricity costs, it is also possible to build a large energy storage system solely to sell electricity. One stop solution service, free design. 12 years warranty, more than 20 years lifetime UL CE MSDS certificates