Re: VICTRON MPPT 75/15
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Gregory Shea
Bonjour Alain,
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I have your problem because a cheap Chinese panel in my solar array cannot reach minimum voltage for the MPPT to turn on each morning. The MPPT “sees” the minimum voltage in a parallel system so, if one panel is under performing, the MPPT won’t turn on,
even if all the other panels are above minimum. You can troubleshoot it by checking the voltage output of each of the panels connected to that MPPT, after you know you have enough solar power in the morning because the second MOPT switches on.
I don’t remember what the minimum voltage needs to be, but your Victron App should tell you.
I solved the problem by putting an inline switch in the positive lead from the weak panel. When the MPPT does not start, I take take panel out of the array by using the inline switch. When the MPPT starts, I switch the weak panel back in again. Once the
controller is functioning, it will accept the weak panel as just one part of the array and everything functions normally.
For me, or was not a serious enough problem to justify buying a new panel, but that would be the correct solution.
That is one possibility, hope it helps.
Greg Shea
Sharki 133 Cap des Iles
Kilada On Sep 8, 2021, at 4:15 AM, Alain Durante <info@...> wrote:
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