While fitting a panel mount fuse holder, I drilled one of the main chokes so I had to contact PowerJack for a new one. They also sent me some new MOSFETs. So the diodes have been upgraded from RHRP860 to RHRP 8120 and the mosfets have been changed from 18N50 to 14N60.

By Julian

Youtuber, shed dweller, solar charge controller aficionado

8 thoughts on “Powerjack 300w grid tie inverter component upgrades”
  1. Avataaar/Circle Created with python_avatars guruji243 says:

    If I input 34v will harm this inverter please?

  2. Avataaar/Circle Created with python_avatars jedinite0 says:

    Wish you had more videos on these grid ties!

  3. Avataaar/Circle Created with python_avatars Joaquim Mendes says:

    I have a sun-300G-wdl had a short circuit. 
    On board disappeared 2 resistances and a damaged diode. 
    Someone can you tell me the value of resistors R63 and R64 and diode D28.
    Thank you

  4. Avataaar/Circle Created with python_avatars Marcelo Taraborelli says:

    Gentlemen: buy an investor a 300w 220v and 110v Recivier. label says 220v, but the bridge is at 110V.
    I can operate on 220v by changing the bridge? Diodes and mosfets are OK.
    It may have burned something? Thanks

  5. Avataaar/Circle Created with python_avatars Charles Lambert says:

    @julius256 The only email addresses I see are for sales. I've emailed Renee and Iris with no response so far. With that kind of customer support and these devices needing constant repair, they won't be needing a Sales group much longer.
    Your posts and videos have been very informative, and I am seeing all of the issues mentioned in the discussions, from blown mosfets and fuses to electric shocks. If Power Jack won't respond, I have to source the components locally using your info in the videos.

  6. Avataaar/Circle Created with python_avatars Charles Lambert says:

    Julius256, who did you contact at Power Jack? I have a 600w GTI that has blown out for the second time in two months. It would be great if I could get them to send me some replacement components like they did for you.

  7. Avataaar/Circle Created with python_avatars sparktastic1 says:

    I have just had to replace a fet in the 1200w GTI. The Fet was blowing on 240V AC power up. On your 300w GTI, do the 18N60 Mosfets have zener diodes between the gate and source of each of these fets? I have a feeling that the fets are getting a jolt of >20v on thier gates at AC power-up, which will destroy the fet. I changed the zener diodes in my unit to 10v (1N4740) and so far (touch wood) the GTI has survived several AC power up cycles. Were your faulty fets shorted between gate and source?

  8. Avataaar/Circle Created with python_avatars sparktastic1 says:

    Hi all.
    Have done a video review of my new (dead) PSWGT-1200 LCD.
    watch?v=AABcKHoyz_g

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