Wiring solar panels in parallel causes the amperage to increase but the voltage remains the same.
Solar panels connected in parallel or series.
Comparing solar panels in series vs.
Connecting solar panels in parallel.
With parallel solar panels 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.
Wiring solar panels in parallel implies connecting positive terminals of each panel together and wiring the negative terminals of each panel together as well.
Then they are connected to the charge controller or to the inverter of the solar system.