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.
How to wire 2 solar panels in parallel.
When solar panels are wired in parallel the positive terminal from one panel is connected to the positive terminal of another panel and the negative terminals of the two panels are connected together.
The positive wires are connected to a positive connector within a combiner box and the negative wires are connected to the negative connector.
Connect all the positive terminals of all the solar panels together and all the negative terminals of all the panels together.
How to wire solar panels in parallel place the panels close to each other and oriented to the sun at the same angle check that the panels do not shade each other and that they are far from possible causes of shading choose an appropriate section of the electrical cable according to the.
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.