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A three-phase-inverter is a type of solar microinverter specifically design to supply three-phase electric power. In conventional microinverter designs that work with one-phase power, the energy from the panel must be stored during the period where the voltage is passing through zero, which it does twice per cycle. In a three phase system, throughout the cycle, one of the three wires has a positive voltage, so the need for storage can be greatly reduced by transferring the output of the panel to different wires during each cycle. The reduction in energy storage significantly lowers the price and complexity of the converter hardware, as well as potentially increasing its expected lifetime.
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