A complete Inverter project

This is one complete inverter project which features automatic mains switching, automatic charging when mains is present, and automatically starts inverter when mains is off.

This project is derived from the 4047 Inverter Oscillator and is a complete project.


Comments on this article before 07-12-2011, here jump to recent comments

  • vijay on September 24, 2011 – 3:24 am

    Thank you for your valuable guide.
    Sir, I want to build solar inverter for driving A.C. load of 200watt for 5 hours. Also I want to charge battery by solar as well as A.c. 230 volts But preference to solar . Since in Maharashtra now tariff rate is very high. Also load shading problems.

  • Matt on October 22, 2011 – 5:38 am

    Pls, i also need clear schmatic of the project

    Arup Reply:
    October 22nd, 2011 at 3:50 pmSchematics is the first picture. Right click and save target as to get full resolution image.
  • Matt on October 23, 2011 – 7:32 am

    I have done that but is not clear. I can’t get the real picture

    Matt Reply:
    October 23rd, 2011 at 9:10 amThank u, is very clear now.
  • Matt on October 26, 2011 – 4:48 pm

    Can i use to charge 12v 70ah battery?

    Arup Reply:
    October 27th, 2011 at 12:08 pmTo charge 70Ah battery, you need atleast 7Amps transformer for C/10 mode.
  • Matt on October 27, 2011 – 2:38 pm

    For my inverter transformer-primary(723turns) and sec(36). And i have 12v 70ah for the inverter. What is my transformer amps rating. If is not suitable what should i do?

    Arup Reply:
    October 27th, 2011 at 3:27 pmTransformer Amps can’t be determined by counting number of turns.
    Generally 6-7Amperes transformers weight around 5Kg.

    Mujtaba Ali Reply:
    November 4th, 2011 at 5:15 pmfirstly u have to tell us your load power in watts? wothout max power it is not possible that i help u?

    Matt Reply:
    November 11th, 2011 at 8:44 pmThe load 600w max.
  • Matt on November 1, 2011 – 11:57 am

    Concerning the relay, pls explain the pins, and how to connect the pin to regulator and the output of the inverter.

    Mujtaba Ali Reply:
    November 4th, 2011 at 4:43 pmDear Matt
    use this relay for autmation & note that the relay(shown in linked relay circuit) pin no:1 & 9 connect with circuit relay pin 11 & 21 respectivly, and relay pin no: 6 & 10 with circuit relay pin no:14 & 22,here is link which aded ….http://www.futurlec.com/Relays/GR220PIN4P.shtml
  • Matt on November 11, 2011 – 8:48 pm

    I buy one 220vac, 12vdc. But the pins does not av number.

  • Matt on November 15, 2011 – 4:55 pm

    Tell me the function of those diode and why we use 7809 regulator not 7805 or 7812. And can this inverter charge 12v 100ah battery.

  • Mujtaba Ali on November 15, 2011 – 6:04 pm

    re check the given link,here is solution off your problem,bcoz any 220VAC relay pins are like given link relay pins…..for just 14 pin type of relay…ok


  • Mujtaba Ali on November 15, 2011 – 6:06 pm

    and you have to need also to follow this link,

  • Mujtaba Ali on November 15, 2011 – 6:14 pm

    that is also in your mind that when you start design inverter, for this purpose you have need re wounded tranformer,bcoz the tranformer which is available at shops can not provide require voltage when you supplied it by battery…..so you have use your own rewounded tranformer for good voltage regulation on Load……..

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28 Responses

  1. Mugs says:

    What’s the powerrating of the inverter,send me information about the invertet

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