Solar charge controller selection help needed
I am looking to put in a solar system that will produce about 30 amps per day. I choose a semi-flexible 135 watt panel made by Sunpower which meets my capacity needs. My only problem is choosing t...
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Per NEC for 30 amps of solar you will need a 45 amp controller; NEC derates them to about 36 amps. Our worst case boondocking usage takes the batteries to 47% state of charge in one day. That is ~662 WH. We are very conservative and normal usage is ~189 WH. A quick and dirty rule of thumb 100 watts of solar per 100AH of battery, but the reality is more complicated.
