100% MPPT

I’ve had infrastructure problems and transport troubles for most of this year, and one thing I’ve wanted to do has had to hang fire since some time in April.

I replaced my main charge controller almost exactly three months ago, and the improvement was so palpable that I vowed to immediately go that route for the rooftop panels as well. They are and always have been on separate controllers for redundancy.


Also, when I set up the ground mount nine years ago those panels had a circuit breaker which has occasionally proven very useful. The roof panels, which went up in 2012, never did and sometimes it’s been an annoyance. So when I bought this second smaller controller I also got a little circuit breaker. So next time I have to take the circuit apart, no arky sparky. I hate the arky sparky.

About Joel

You shouldn't ask these questions of a paranoid recluse, you know.
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8 Responses to 100% MPPT

  1. Steve Walton says:

    Arky sparky much too costly, sees the face go chalky, makes one go potty.

  2. Paul B says:

    Arky sparky is better than smoky wokey. Unless you provide the ground.

  3. Mark Matis says:

    Arky Sparky could be training Tobie for thunderstorms, if it is sufficiently sparky…

  4. Zendo Deb says:

    One of the first things I learned when living off 12 volts was to put batter disconnect switches everywhere. Real solar these days is more likely to be 48 volts, and that is a bit more than arky sparky we got your attention.

    The other thing I learned was to keep the little red rubber guards on all the positive terminals, but that is story for another time.

  5. Steve Walton says:

    Zendo: “Never bring a wrench to a battery farm.”

  6. The Neon Madman says:

    The difference in performance over a PWM controller is that noticeable, eh? I believe that I will have to get one of these for my RV and fall camping.

  7. Zendo Deb says:

    Steve, Truer words were never spoken

  8. Anonymous says:

    Will you update your book for modern times?

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