Solar panels are wired in series when you connect the positive terminal of one panel to the negative terminal of another.
Connecting solar panels in parallel or series.
Unlike connecting in series connecting in parallel allows the voltage to stay the same but the current adds up.
Solar cells can also be arranged in parallel where each solar panel is connected to every other panel in the circuit.
Connecting your panels in parallel will increase the amps and keep the voltage the same.
This is often used in 12v systems with multiple panels as wiring 12v panels in parallel allows you to keep your charging capabilities 12v.
Solar panels are connected in parallel to obtain higher output current.
This is usually used with 12v set ups.
When connecting panels in series parallel the panels are wired together in series to form strings of panels.
Now lets look at connecting solar panels in parallel.
When solar panels are wired in series the voltage of the panels adds together but the amperage remains the same.
After that the strings of series connected panels are connected to each other in parallel.