120V / 240V Split Phase Inverter Chargers

Sigineer Power’s 120/240V Split Phase Inverter Chargers go from 3,000 watts to 15,000 watts & 18,000W with DC input of 12V, 24V, 48V & 96V.

What is a split phase inverter?

120/240 Vac split phase is a type of single-phase three-wire mid-point neutral power distribution system commonly found in America with a standard phase-neutral voltage of 120 Vac for residential and light commercial applications. The phase to phase (Live to Live) voltage is 240Vac for heavy industrial loads such as compressors, fridge, and pumps. Because of the 120-0-120 voltage configuration, it is also sometimes referred to as dual-phase, 2 phase / two-phase or even mistakenly, single-phase 220Vac.

These low-frequency split-phase inverters take 240v nominal input from shore power or generator for charging. This 240V can be from a 240V center tapped split-phase power supply of 2 hotlines or the 208V 3 phase Wye system. When the AC input is from 3 phase power system, the 3 phase neutral should NEVER be connected to our inverter.

In battery mode, these inverters produce 2 legs of 120v hotlines which can be hooked to the 220V mains power distribution panel in your home or mobile business vehicle.

There are two 120v hotlines, one neutral and one ground.

The voltage between L1 and L2 is 240 Vac, between either one hotline and the neutral is 120V.  The 240V is made by the two hotlines cycling 180 degrees out of phase with each other.

This power system can drive either 120V or 240V equipments. The 120V is perfect for home and small scale commercial or mobile applications.

These split phase inverter models are a combination of 120 240V inverter, smart battery charger, and transfer switch, and can be easily integrated into your current house wiring.
With the seamless transition transfer switch, the 2 phase inverters are virtually a line interactive UPS ( Uninterruptible Power Supply ) for emergency situations and natural disasters.

In North American households, the neutral is always bonded to earth ground in the electrical panel. DON’T connect the AC input neutral to inverter ground. The AC input N is not required in the wiring. The output Neutral of the inverter is floating, it is not connected to ground in operation.

120V 240V split phase inverter AC wiring

120V 240V split phase inverter AC wiring

Click to review the Sigineer Power split phase inverter schematics in both AC mode and battery mode

Our split-phase inverters support wiring with neutral bonded with the ground or not.

NEC code requires the neutral bonded with the ground.

For other applications, neutral and ground separation preferred. Follow this wiring instruction.

We have some customized split phase inverter charger compliant with the requirements of UL 1741 for use in stand-alone (not grid-connected) power systems, these models have the neutral grounded. They are not listed on our website publicly.

We also have some split-phase Tesla battery inverters with voltage setting for Tesla battery modules.

Find the instruction for wiring 120/240V split phase inverter in 230V single phase power system.