Portable Solar Power Inverter

A compact and portable 12V solar power inverter circuit that will keep away darkness. This tried and tested design converts 12V DC from the storage battery of any solar power system to 230V AC that is enough to power a number of energy saving CFLs. Just feed 12V DC input through input jack J1 (with right polarity) and flip switch S1 to ON position!

The solar powered inverter circuit, optimised for CFL loads, uses IC CD4047B (IC1) as a freerunning astable oscillator. Capacitor C2 and resistor R2 are timing components. The pulse repetition rate of IC1 is determined by the value of 4.4xC2xR2. IC1 generates cmplementary squarewave signals at its output pins 10 and 11. Power Mosfets T1 and T2 serve as drivers for the high-voltage generator,realised using step-up transformer (X1).

Note that an ordinary (AC 230V to 12-0-12/5Amp) step-down transformer is here used for reverse function (step-up) and its output is available at AC mains outlet J2. You can light up two to four low wattage (ie 11W at AC 230V) ready-made Compact Flourescent Lamps (CFLs) using this portable solar power inverter circuit. Two small, independent heatsinks are necessary for T1 and T2. Finally, you can try an AC 230V to 9-0-9/5Amp rated transformer as X1.

12V Solar Power Inverter Circuit Schematic

12v solar power inverter circuit diagram


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  • Nirmala

    Sir may i know what is the function of the zener diode?

    • shruti

      Dear Nirmala,

      When the voltage on the capacitor is less than the zener voltage, the zener diode is not conducting and so the voltage on the capacitor rises as in an RC circuit. When the voltage on the capacitor reach the Zener voltage then the diode start breakdown ant the voltage is clamped to this voltage.
      I hope this will help.


    sir i have purchased all assembly pls i want know where to plug these IC MOSFFIT REGISTER AND ALL THE ASCIERIES iam fresher pls guide me now i readin your litrecture in electronics for you


    sir i have purchased all assembly pls i want know where to plug these IC MOSFFIT REGISTER AND ALL THE ASCIERIES iam fresher pls guide me

  • shruti

    Could you please tell me the input current required in this circuit. Also let me know what will be the output current of the inverter.

  • Veerakumar

    i tried this project but offently my MOSFET get burst. can you tell me ,why its happen ?? also suggest some idea for efficient circuit comletion



    Very interesting.what should i do to run a 60 watt ceiling fan of 230 vac, directly from solar panel using sunlight, w/o using battery. Can I modify & use the UPS of my desk top for the same.

  • srinivad

    Sir i want do a major project based on solar power utilisation mostly to convert n glow a bulb using solar panels plz suggest me ckt and cost

  • bala

    is it possible to use solar panel at our house terrace and connect it directly to electric grid? in that case what is the mininimum ratings and cost of the solar panel?

  • Lonnie Lefeavers

    It’s hilarious! If your not familiar with (english) most Current Ratings. & not willing to give it a HOT test (with some flying debris protection). Then go to College ^ do the Math. All this is rated in current. If u have ocilliscope, fine tuneand mmilitary spec- your Resistor ay proper Variable. Then soldier Res. In.. no Vr save variable for Engineering. GO TO SCHOOL. Note: My LED Crystal was Stolen W-S NC. @FTCC Forsyth Tech.Vomm. College. And I am jobless (so) learn and keep ur invention’s From Chinese & Amy’s & Obama’s. Patent laws favor Thieves. Obama Law

  • sanjed arfin

    for which value of c2 , and c2 i get 50HZ

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