Apparatuses and methods for power supply realization using multiple inverters

A system, comprising:

• at least two inverters, each inverter having an AC input port and a DC output port, the AC input ports being connected in parallel and the DC output ports being connected in parallel, each inverter including
• a main DC contactor,
• a main AC contactor, the main AC contactor configured for connection to a mains AC power source, and
• an AC pre-charge circuit connected in parallel with the main AC contactor, wherein the AC pre-charge circuit includes a pre-charge resistor and an AC pre-charge contactor;
• and
• a controller configured to give a start command to the at least two inverters;
• wherein after receiving a start command from the controller each of the at least two inverters
• closes its AC pre-charge contactor and
• charges its internal DC bus through the pre-charge resistor and the AC pre-charge contactor, and
• when the internal DC bus reaches a voltage that is within a predetermined threshold of the AC voltage of the mains AC power source, the main AC contactor is closed and the pre-charge contactor is opened.