Wiring solar panels in a parallel circuit.
How to wire 2 solar panels in parallel.
The positive wires are connected to a positive connector within a combiner box and the negative wires are connected to the negative connector.
You do not want to wire more than 2 panels in parallel using couplers because this does not give you over current protection between the two panels.
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 at 20 amps.
Connect all the positive terminals of all the solar panels together and all the negative terminals of all the panels together.
The solar panels are usually designed that they can handle being backfed from one panel but if you have a whole bunch you do run the risk of ruining your solar panel.