Solar Controllers--Don't be a Sucker! :(
Just got to say it again, how it is we are sitting here for five months off grid on solar with no problems at all (third season on solar like this), using the non-programmable, non-MPPT, solar control...
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I don't know why any of that matters when your panel is 24V or higher. You MUST use MPPT or lose your amps/burn up your controller. And why use MPPT on a 12V panel? Sure you could wire your batteries for 24V and run PWM but then you need a DC-DC converter and a 24V regular converter. Might as well get a MPPT controller cause you haven't saved any money.
