This is a brief overview on pure sine wave and modified sine wave inveters that are commonly used in both home solar and off grid applications.

Pure sine wave inverters are used to operate sensitive electronic devices that require high quality waveform with little harmonic distortion. In addition, they have high surge capacity which means they are able to exceed their rated wattage for a limited time. This enables power motors to start easily which can draw up to seven times their rated wattage during startup. Virtually any electronic device will operate with the output from a pure sine wave inverter.

Modified sine wave inverters (modified square wave or step wave) approximate a pure sine waveform. Modified sine wave inverters are designed to satisfy the efficiency requirements of the photovoltaic system while being less expensive than pure sine waveform inverters. These inverters are capable of operating a wide variety of loads

Below is a guideline of applications that can run off a modified sine wave inverter or true sine wave inverter.

Source: Internet.

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