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This is the another 300W inverter circuit diagram… This circuit uses many power transistors to get high power output before the transformer stepping up the high current-low voltage input to become low current-high voltage output.

Good luck… build this inverter with your own risk.

In this document you will find some important lessons related to the basic theory of making the inverter circuit, among others, about the working system of the inverter and several calculations required in making an inverter.

If you really want to make an inverter, there is nothing wrong if you study the document first before you proceed further.

This document was created by Electronic’s Department of Northern Alberta Institute in of Technology.

This  power inverter uses only 9 electronic components. This inverter circuit will turn 10 to 16VDC into 115V / 60Hz square wave AC power. It was able to operate AC equipment up to 25W.

The first section of the 555 timer is wires as an astable oscillator with R2 and C1 setting the frequency. The output is available at pin 5. The second section is wired as a phase inverter. That output is available at pin 9. Resistor R3 and R4 keep output transistor Q1 and Q2 from loading down the oscillator.

Read more about 25W Inverter circuit