What Is Split Phase Inverter?

120/240vac 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 input from shore power or generator for charging and output 120/240 vac power, they produce 2 legs of 120v hotlines which can be hooked to the 220V main 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 hot line and neutral, is 120V.  The 240V is made by the two hot lines cycling 180 degrees out of phase with each other.
This power system can drive either 120V or 240V equipment. The 120V is perfect for home and small-scale commercial or mobile applications.
Our popular pure sine wave split phase inverter chargers are:

Cosuper CPT series split phase inverter 120v 240v


We also have specialized 12vdc to 120V/240V output 4KW inverter charger that allows you to power 120V and 240V loads from single phase 120V input. This model aims to boost/step up shore power from 120Vac to 240V for larger loads such as the deep well pump or other dedicated high power 240VAC loads.
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 the North American household, 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, and the inverter has an internal relay that will automatically bond the neutral with the ground in battery mode.


In August 2018, Cosuper technicians went to the United States to check the US home circuit situation, combined with Cosuper split-phase inverters, and upgraded our products. Now Cosuper split-phase inverters are already available in the US grid. Safe use in the environment.


Now in the energy market in Puerto Rico, Cosuper Split phase inverters are very popular.

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Contact: Hayden


Tel: 86-0512-68638910

Add: Rm. 103, Bldg. 18. No. 99, Gangtian Road Suzhou Industrial Park JiangSu Province China

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