Pure Sine Wave Power Inverter 3000W

Pure Sine Wave Power Inverter 3000W

Here you will find our home made pure sine wave power inverter based on SPWM EG8010. It converts 48V to 220V with 3000 watts output.



Pure Sine Wave Power Inverter 3kW Schematic
Pure Sine Wave Power Inverter 3kW Schematic
( as PDF)
Pure Sine Wave Power Inverter 3kW PCB Top
Pure Sine Wave Power Inverter 3kW PCB Top
( as PDF)
Pure Sine Wave Power Inverter 3kW PCB Bottom
Pure Sine Wave Power Inverter 3kW PCB Bottom
( as PDF)
Soft Start Motor Pump Schematic
Soft Start Motor Pump Schematic
( as PDF)


We are using SPWM EG8010 as driver board that can be ordered from here:

Transformers information:

  • T2 is the big toroid with params A-B 32V 80A, C-D 220V 15A
  • T3, T4 and T5 are filtering toroids for 23kHz

More info is coming soon…



44 Responses to Pure Sine Wave Power Inverter 3000W

  1. Thanks for sharing a good schematic of pure sine wave inverter, I want to build this inverter and require following information.
    1. Where we connect J1 and J2.
    2. Where we connect P3 and P7
    3. Specification of T1,T3,T4,T5 and T6
    4. Voltage value at VFB/PA and IFB/PA
    5. Where we connect P21, V1 and P24 V2
    6. In circuit shows 12.5 Volt distribution but we don’t have power supply of 12.5Volts.
    Your urgent response is highly appreciated

    • Hello Intizar,

      Thanks that you appreciate our work!

      We updated the schematics so it will answer some of your questions.
      Please cleanup your browser cache and try to get the PDF again.

      Here are answers to some of your questions:
      1. J1 and J2 are connected to P14 and P21 where V1/V2 is labeled.
      2. For P3 and P7 will describe them later need to check the working device.
      3. For all Tx will add parameters as soon as possible.
      4. For the voltage values of VFB/IFB these are connected to the EG8010 board will describe them how in details on the page.
      5. This is the same as my answer 1.
      6. Initially we tested with 15V but now the working device is on 12.5 so please check the updated schematic.


      • Hello Dachev,
        Thanks for quick reply.
        Please recheck the part number SBMG188CA because no data sheet available on net also recheck the value of inductor 75mH_ 2kw (milli hennery) in my opinion it is too big.
        STW52NK25Z not available in my country can you suggest similar replacement.

  2. Hi, am building inverter based on eg8010 board, but charger will be included, I want to drive the low side FETs with 25khz simuteanously with a duty of 7% , and the upper side FETs will act as a fast diodes, do you have any idea on how the dual mode inverter will be implemented with eg8010. Thanks

  3. Hello Mr. , nice work.

    I am building a low power inverter but because my wrong +5V pin connector (EGS002) was supplied with +12V and the board don´t work now.

    The board (microprocessor) was damaged?


    • Hello Sandro,

      Most probably you burn out the EGS002 so you should get new board.

      Just in case check the board chips after supplying with correct voltage and see if there is some anomalies on the expected outputs.


  4. Hello Mr.Georgi Dachev
    I am from Indonesian. good job , your work is very nice for me
    Do you want to help me, where i can buy this modul in my country
    , because it is new god product.
    Thanks for all

  5. Thanks for your great inverter, what about the transformer details
    who to winding for 1500w , 2000w ,3000w.



    • There is no any software written here from us here.
      You need to buy the board EGS002, check the links in the description above.

  7. Can your design deal with higher frequency outputs? Let’s say some KHz instead of the 50Hz or 60Hz? The advantage would be that one can use a smaller transformer (ferrite core) but on the other hand, the first output would have to be rectified and the oscillated again to the desired frequency. Or maybe we can use some smart divider circuit there? It would have to deal with 200 – 300 Volts. Any ideas?

  8. Thank you for the great effort. Looks very good and I intend to build it. Did you manage to update the circuit with a charger? If yes could you please upload 🙂
    OR could any one tell me where I can get a cct with a charger included?
    Thanks all.

      • Hi to all
        I’m an italian hobbyst.
        Thanks for sharing a good schematic of pure sine wave inverter and it looks very good and I intend to build it.
        But i need some explanation:
        1)Specification of T1,T3,T4,T5,T6
        2)how to connect J1 and J2 with P14 and P21 (V1-V2), i intend with a fly wire?
        3)The voltage value at VFB/PA and IFB/PA
        4)how to connect P3 and P7, or where i connect them?
        Your kind reply is highly appreciated.

        (Forgive my bad English)

        Best regards

        Antonino Giordano

  9. Hello. There is a small print error in the circuit. The 2HO power switches need to be connected to the driver output, between Q2 and Q8. And disconnect from D3.
    And the question, on the switch S1 output VCC is 12.5v.?
    Thank you.

    • Thanks for the Q2/Q8 findings we fixed the error in the schematic.
      Also yep it is 12.5v the S1 start switch.

  10. Hi,

    Great design. Please inform me why P2 Neutral is connected to P5 Live? I take P2, P5 and P6 is the AC Outputs.

  11. Hello. Have you had any problems with this inverter and Surge currents from inductive loads such as a Fridge/Freezer or power tool motor? I have a 2Kw inverter of somewhat similar design with the EGS002, but its quite a bit simpler than yours. When I tried powering an Angle Grinder off it, it blew one of the FET’s, and I am trying to figure out a way to prevent that happening, as the surge loading is too high. Any suggestions? Thank you.

  12. TanQ for sharing of this Nice Work 🙂
    I have a question…

    By Using EG0810 Is it possible to change of Voltage output’s amplitude or it is fixed?
    if it is possible to change output amplitude, how EG0810 could do it?

  13. Ciao Georgi
    Congratulations for the work
    I want to ask you the difference of the eg002 module with integrated ne555
    Thanks Dario

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