Abstract: A switching apparatus has: first line, second line, neutral, and ground inputs; first line, second line, neutral, and ground outputs; inverter line, inverter neutral, and inverter ground inputs; inverter line, inverter neutral, and inverter ground outputs; electrical relays; and a control circuit. The first line and neutral inputs are connected to the inverter line and inverter neutral inputs, respectively; the inverter line output is connected to the first line output. With power only from the inverter output, or with single-phase power on the inverter line output and second line input, the inverter line and inverter neutral outputs are connected to the first line and neutral outputs, respectively, using the relays and control circuit. With split-phase power on the invert line output and second line input, the second line and neutral inputs are connected to the second line and neutral outputs, using the relays and control circuit.