Quote:
Originally Posted by DavidEM
Yes they do, but they are PWM types. These work ok on 12V panels but you lose about 15% of available power due to the PWM workings. MPPT types use about 98% of available power. And if you wire two panels in series to limit voltage drop, you absolutely have to use an MPPT type.
David
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I noticed that the MPPT units cost more. I am not concerned about that. I just want it to work and not be a problem. So based on your recommendation I will buy that one. I don't know what the difference between the PWM and the MPPT. I will add a 100w solar panel to the existing 100w, and add 2 batteries. I was told in an earlier post that I should use 30A controller. So that is what I am going to do. Just have to find the right controller and get it ordered.
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