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Using Sunpower positive ground panels off grid with a 12V battery system

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  • Using Sunpower positive ground panels off grid with a 12V battery system

    Cross-posting this from the RV forum which gets very little traffic. I installed 3 x 327w Sunpower panels on my Sprinter. They are far and away the best size and only way to achieve such high watts on a vehicle. However, someone offhandedly mentioned they are a poor choice for 12V because Sunpower has a positive ground. I've also heard an MPPT controller will nullify this.

    I have:

    Victron 150/85 MPPT CC
    400AH batttleborn LiFePo batteries (I got great deal)

    but nothing's hooked up yet as I'm waiting on cabling. Am I screwed? These panels are so perfect and the yield is so good, I'll buy whatever to get them to work. Obviously, I can't buy a GT Inverter though.

    Am I screwed, or is there a happy ending here?

    Thanks!

  • #2
    Cancel that. I see the E20 series and later have no grounding restrictions as per an installation sheet from sunpower. Excellent.

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