Question: what is the difference between connecting in parallel and series strings of wiring?
Answer: When wiring solar panels in parallel, the amperage (current) is additive, but the voltage remains the same. ... If you had 4 solar panels in parallel and each was rated at 12 volts and 5 amps, the entire array would be 12 volts and 20 amps. Series circuits have only one path for current to travel along.