Zhongba County in Tibet is a more typical plateau mountainous terrain, with perennial snow cover and freezing weather. Heat pump heating has become the immediate need of the villagers, but because of the scarcity of electricity, the application of photovoltaic storage diesel is the best choice for the local power supply. Voltaic provided a set of 500kW & 1MWh energy storage system for them, adopting the micro-grid application mode of photovoltaic+diesel engine+heat pump heating+energy storage, so that the whole system can operate normally without relying on the power grid.