Charge controller recommendations
I have a small solar charging system consisting of two 12v 75w panels wired in series and a failing cheap MPPT charge controller. I may be acquiring another identical panel too. I'm currently leanin...
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Sunsaver 15 still costs $200, lacking battery temperature control (optional $), and display (optional $). If I were to go MPPT route, I would rather get Rogue.
About how much "more energy" MPPT will extract... This is beyond my expertise. But I recall one of those debates - with the consensus somewhere after a dozen pages that MPPT gain, compared to PWM, is somewhere from 0 to 10%, depending on battery SOC and other things.
So... Get any cheap PWM, doesn't matter how cheap or what brand. If you really want more energy, then also get the 3rd panel - this will result in MUCH higher total energy at the same or slightly higher cost than MPPT + 2*75W.
About how much "more energy" MPPT will extract... This is beyond my expertise. But I recall one of those debates - with the consensus somewhere after a dozen pages that MPPT gain, compared to PWM, is somewhere from 0 to 10%, depending on battery SOC and other things.
So... Get any cheap PWM, doesn't matter how cheap or what brand. If you really want more energy, then also get the 3rd panel - this will result in MUCH higher total energy at the same or slightly higher cost than MPPT + 2*75W.
