Inverter circuit, 12V to 220V at 500W

This is inverter circuit 500W output. It will convert 12VDC to 220V 50Hz. You can build it easily and inexpensive.  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.

inverter circuit 12V to 220V 500w

When looking for the circuit. I get headaches. If you are a beginner or I cannot buy expensive good quality circuits. Requires only one transistor. Or if you have free time. I want to build an 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 an 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 500 watts output. 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.

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

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This projects they are helping our school


I’m Brasilian, this project it’s very simple, but efficient!


Please sir, is it possible to inprove on this circuit to produce 1.5kva? If possible, how can i go about it?


can i have a enlarged and clear image of circuit dexter

just contact me if you want asimple lw cost inverter 12v to 110 1nd up ac

Hóstio Farias

Gostei muito deste projeto vou tentar montar assim q tiver um tempinho…

Michael chiemeka

This project is simply great. If this could be upgraded to 1.5kva pls tell me how to go about it.

Michael John

Hi guys please could you send me a clearer and enlarged circiut and if the circuit can be uprated to 1.5kw please advise. Thank you


hey guyz.. what is DX and RX in schematic ??


please what is the meaning of DX 2A, and what diode can we use as equivalent of 2A. Thnx


In this curcuit, if connected it with 12v/5a battery, what is the output voltage and current?


can i use only 4 2n3055 transistor??


when i do simulation on proteus.. i did not get the output 220


Hm..i already made this circuit inverter and i read some questions that need help. The resistor w/out wattage is all 1/4 watt cfr,and the 1N414B you may use 1N4148 for fast switching,and also the DIODE DX2A it means its a diode,you may use 1N5402,and to be able to have an output fix to 500 watt the transistor should be 14 pc’s and it means 7 channel bec.the 1st stage of 2n3055 is just to switch on or power the other channel..RX Is also mean it is a resistor 10watts 0.01ohms wire wound and also remember the 22ohms 10 watt is… Read more »


My mistake the RX should be 10 watt 0.1ohms i just corrected it..peace


thanks 😀

try and failed

can you give a lil explaination of 100ohm 1/4watt? can i use 100ohw 5watt instead?


Junrev, have u finished with your simulation? is the output produces 220VAC?


@lah yes i already finished it and it works great,yes the output is 220V 50hz but if the battery is fully charge it will be about 225V believe me the circuit works great but you should put a heatsink or blower in resistor 10watt 22ohms to prevent over heating and use 14 pieces 2N3055 instead of 10, the costlier one is the best,for ex. The toshiba 2n3055 is the best i can suggest..and also be carefull when building it,.c0z it will harm you,make sure the connection of the transistor is correct coz once you have an error specially in 2n3055… Read more »


@try and field the 100ohm 1/4 watt in the 1st channel between DX2A is ok but if you like to make it 5 watt sure why not?.much better but never change the value of the 100 ohm..


@junrev you using transformer cnter tap 500VA??


@junrev do you have a simulation or picture for that inverter..
I have made that inverter for my final project using circuit above…but it not working..
hmmm. 🙁
can you give me something for me to troubleshoot..


@seen yes i used 500VA center tapped transformer tamagawa brand.maybe you have an error…sorry i dont have a picture of you really know how to read schematic diagram?. If you have a mistake the circuit wont work specially transistor..know how to read the base,collector and emitter..i suggest to check the all transistor coz maybe you already damage it..try to check the connection or wirings..and check also the diode polarity..thats all i can help…if you really dont know how to read schematic i suggest you to practice it by the help of professional a technician but still im moderate… Read more »


sir ,if the .1ohms 10w,it is ok or not…what is the purpose of that resistor?


sir ,what is the purpose of the resistor .1/100w?


sir ,what is the purpose of the resistor .1/10w?


sir, what will i do if i want to have an output frequency of 60hz?


if I may ask are the 2n3055 transistors Bases connected together?
And what if I use TIP3055 transistor instead of 2N3055?
also can I use 1ohm @ the emitters of the 2n3055 transistors?


What does the RX2 mean


sir your circuit is 50hz how to become 60hz what component shoud be change


i need help of u. can u tell me how make 1500watt inverter by using 12volt through power plant or dainmmo system.


Hm..many questions but still no answer.. If you need an inverter and a pro electronics engneer search the circuit of swagatam majundar he is kind and willing to help you all. He is good in electronic and all of his circuit will surely work.. Peace


i need a 2kva transistor circuit diagram pls.
my email, +2348121690801, +2347030418159


kindly send me the diagram for 2kva transistor inverter circuit. to my email. [email protected]


Pls, fellow Engineer. I need cct diagram and full explanation of 1.5KVA Inverter. pls my email : [email protected]. thanks.

i m John i want to make an inverter plz provide me the circuit.

Provide me inverter circuit

i m John i want to make an inverter plz provide me the circuit.

How can i made 1000wats inverter?

bayani rabago

I think,if anybody want a higher wattage of the inverter,then u hav to alter the wattage of small value resistor like the .1ohm to higher wattage,and add another stages of the power transistor(e.I)3055 and replace the transformer volt amp rating with a higher vamp rating.u can also utilize your inverter into making it a charger so u won’t need another gadget to recharge your battery.,just by adding a couple of heatsinked diode or rectifier,a capacitor and a dpdt switch those who want to make the 50hz frequency to become 60 it is not impossible but a very complex ckt… Read more »


ahmp does the 50A current rating of the dc voltage source affects the output? how?


The work is Good but hw about the transformer, hw is the recoiling gona be

cesar ranolo

ahm… this is great 4 me….. while im in d first yr. of E.C.E…Thanks sa diagram…


الدارات جيدة ولكن نحتاج الى دارات ذات استطاعة أكبر وتعمل بشكل الي عندما ينقطع التيار 220 فولت وعندما يوصل التيار 220 فولت تشحن البطارية


can i use 2.2 ohm/5w resistance instead of 0.01ohm /10 w


what kind of this transformer? is this available or common in the market? how much the amper of this transformer? reply pls


what kind of transformer


it is the transformer that has primary winding of 220V ac and the secondary have center tap output of 12v? how much the amper? reply pls. because I choose this for my thesis… in this month


i mean the output secondary of the transformer have 12v 0 12v?

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