In fact by wiring several solar panels in series we increase the voltage keeping the same current while wiring them in parallel we increase the current keeping the same voltage.
Wiring multiple solar panels in parallel.
To do this wiring make two sets pairs of pv panels and connect them in series.
Now connect the two sets of series connected solar panels in parallel as shown in the following fig.
When wiring solar panels in parallel the amperage current is additive but the voltage remains the same.
Connecting two portable solar panels or any other type of solar panel same wattage in parallel will multiply the total power output current by 2 and keep the system voltage at the same level.
This way you will have two pairs of solar panels connected in series.
The connection of multiple solar panels in parallel arises from the need to reach certain current values at the output without changing the voltage.
Parallel solar panel connections should be made using y connectors available at redarc.
Now you are having four 12v 10a solar panels connected in series parallel configuration.
The same voltage is the system voltage which for off grid solar panels systems is usually as low as either 6v or 12v.
Wiring in parallel allows you to have more solar panels that produce energy without exceeding the operating voltage limits of your inverter.
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.
So if you wired the same panels from before in parallel the voltage of the system would remain at 40 volts but the amperage would increase to 10 amps.
Series circuits have only one path for current to travel along.
When connecting two or more solar panels in parallel you end up with less shading effect.
To wire two or more solar panels and batteries in parallel simply connect the positive terminal of solar panel or battery to the positive terminal of solar panel or battery and vise versa respectively as shown in the fig below.
Connecting solar panels in parallel is just the opposite of series connection and is used to increase the total output current of the array and hence the total output power while keeping the same voltage.