Microcontroller Based Modular Inverter is provided with protection with audible alarm for overload, low battery, short circuit and erratic condition. The Modular Inverter is featured with built in fast change over to run sophisticated load. The Modular Inverter is a microcontroller based unit that provides regulated output voltage and peak power output. The Modular Inverter also runs mix load like light, fan, computer, TV etc together. Microcontroller Based Modular Inverter is fitted with multi stage CVCC pulse charger that works from 140 V to 290 V AC.