Solar-plus–battery storage systems rely on advanced inverters to operate without any support from the grid in case of outages, if they are designed to do so. Historically, electrical power has been predominantly generated by burning a fuel and creating steam, which then spins a turbine generator. . Interconnection standards define how a distributed generation system, such as solar photovoltaics (PVs), can connect to the grid. This. . BoxPower's flagship SolarContainer is a fully integrated microgrid-in-a-boxthat combines solar PV,battery storage,and intelligent inverters,with optional backup generation. Up to 42 inverterscan be connected to one Inverter Manager. Without utility compensation, most commercial solar installations are not financially sustainable.