12V to 220V Inverter circuit, 500W

This is inverter circuit, 12VDC to 220V 50Hz at 500W power.
It easy to make and Low cost.

Friends favorite this, because like working outdoors, or to backup storage to use when necessary.
Most of this is circuit low power, which is not suitable for practical applications. My friends said that he would be about 500 Watt.

It is a good size. Use with television receivers and light bulbs as well.

When looking for circuit. I get headaches. If you are a beginner or I can not buy expensive good quality circuits. Requires only one transistor. Or if you have free time. I want to build old circuit is alive again. This circuit will accommodate all your needs. It is a simple circuit. The same principle, I take battery voltage 12V to produce a oscillator about 100 Hz and pass to a two frequency divider circuit is only 50HZ. And drive a 10 ampere transformer with 10 x 2N3055 transistor in parallel. By a single transistor has 2A, when I use 10 transistors or 5 pairs of drive high current output. The complexity of circuit, but the principle is not it, and it is the number of transistors on a basic, easy to buy. You may be modified 100 watt power inverter To the size of transistors and transformers as well.


1. Battery for this projects.
If you need 500watt output inverter your battery must be 45Ah. (500w/12V = 41A).
Maximum current for 1 hour.

2.The solar battery charger( 18 volts solar voltage)
Full sunrise power on day about 5 hour.
So you need current from the solar is (45A/5hour = 9A)
or 9A x 18V = 160 watts.

More about Transistor inverter circuit

Also 500W Inverter circuit for you

If you think that This circuit is not good enough. For your work. It is hard to find equipment. You do not have it now. These circuits may be viewed below. It may be appropriate for you.

1. Inverter 500W 12V to 220V By IC 4047+2N3055

Using this circuit you can convert the 12V dc in to the 220V Ac. In this
circuit 4047 is use to generate the square wave of 50hz and amplify the
current and then amplify the voltage by using the step transformer.


How to calculate transformer rating

The basic formula is P=VI and between input output of the
transformer we have
Power input = Power output

For example if we want a 220W output at 220V then we need 1A at the output.
Then at the input we must have at least 18.3V at 12V because: 12V*18.3 =

So you have to wind the step up transformer 12v to 220v but input winding
must be capable to bear 20A.

2. 500 watts MOSFET power inverter circuit

As 200 watts inverter circuit. We use Q1, Q2 is the mosfet acts as a power output. That can withstand currents up to 18A. According to properties listed in the table of Figure 2. If the circuit is fully functional with maximum power of 12V x 18A = 216 watts. But in practice, the circuit should work up, it may be damaged. Therefore, it is designed to operate up to 200 watts.

Since we want the current more than 40A. But the power mosfet single, able to withstand current is 18A, therefore have to be 3 pcs. And When designing a circuit in a push-pull model thus requires a power mosfet 3 pairs.

We have the output current up to 54A which can withstand more demanding than 14A. It is good for the operation of the circuit. Because each power mosfet will not be overburdened. And the heat of the mosfet least, the lifetime of the life circuit.

Then see circuit diagram below:
The schematic diagram of this projects
 The schematic diagram of this projects

full components layout
This is full components layout

You can look more  : 500 watts MOSFET power inverter circuit


  1. Williy September 6, 2016
  2. Rachmawan Mandegani September 13, 2016
  3. Ramjan molla September 29, 2016
  4. jonathan karanja October 5, 2016

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