Hi, I have two of the above panels charging 2x 12 volt batteries in parallel running a 12 volt water pump. I have been only using one panel as the small controller I have is only 5 amp. I now have a 20 amp PWM controller. Really cheap one(picture attached. Would it be best to series or parallel the two panels. They are 17.1 volt and 83 watt each. I expect parallel is best as the 17.1 volts is plenty to charge a 12 volt battery system.
Thanks,
Thanks,
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