电能是由铺设在屋顶并与变极器和直流电网相连的PV板提供.The electricity is supplied by roof - mounted PV cells linked to an inverter and a DC net.电能是由铺设在屋顶并与变极器和直流电网相连的pv板提供.The electricity is supplied by roof - mounted PV cells linked to inverter ...