Patent ID: 8867248

Claim:
A grid-connectable inverter comprising: a first DC input node and a second DC input node; a first AC output node and a second AC output node; a first switch, a second switch, a third switch, and a fourth switch; a first diode and a second diode; a positive current path for a positive half-cycle; a first free-wheel current path for the positive half-cycle, wherein the first free-wheel current path includes the first AC output node, the first switch, the first diode, the fourth switch, and the second AC output node, and wherein no additional diode is connected in series with the first diode between the first and fourth switch; a negative current path for a negative half-cycle; and a second free-wheel current path for the negative half-cycle, wherein the second free-wheel current path includes the second AC output node, the second switch, the second diode, the third switch, and the first AC output node, and wherein no additional diode is connected in series with the second diode between the second and third switch.