Commercial grade energy storage off grid system 30KW to 150KW is equipped with long-life high-quality highly voltage lithium batteries and adopts a modular design. It integrates solar charge controllers, system controllers and inverters, lithium batteries with BMS. It can use solar energy for offering power to devices for farm, factory, hospital and school etc. It is an ideal product to solve power supply needs in islands, communication base stations and other areas without grid coverage.