Patent ID: 7456519

Claim:
A power conversion system comprising: a power generating apparatus; an auxiliary generation device that consumes a power when the power generating apparatus is started up; an auxiliary-devised power source that supplies a desired voltage to the auxiliary generation device; a secondary battery device chargeable and dischargeable with power generated by the power generating apparatus; a bilateral DC/DC converter connected to the secondary battery device, for controlling charge-discharge of said secondary battery device; a bilateral DC/AC inverter that causes the power generating apparatus to cooperate with a commercial AC power source; wherein DC terminals of the bilateral DC/AC inverter and inputs of the auxiliary-devised power source are connected to power generating apparatus and the bilateral DC/DC converter; wherein the bilateral DC/DC converter is comprised of a circuit to allow passing of discharge current from the secondary battery device when the bilateral DC/DC converter is stopped; and wherein when the power generating apparatus generates no power, the bilateral DC/AC inverter and the bilateral DC/DC converter are stopped.