Excellent question and i cannot for certain tell you the answer except to say that i leave solar panels out in the sun regularly not connected to anything and they have not developed any damage.
Leaving solar panels disconnected.
You don t need to disconnect that charger prior to starting your vehicle.
Turn off any pump connected to the solar panel.
Touch the metal part of the red.
Older sunpower panels require a ground on the positive side to prevent polarization of the silicon cells but this rarely if ever happens on a boat.
It doesn t matter if panels have leads disconnected as the voc will be present at the shielded tips but no current can flow absolutely nothing happens.
I would be more worried about the connectors of your panels when not in use accidentally coming in contact with something connecting a circuit and causing damage or a fire.
How to safely disconnect solar panels step 1.
Take large opaque cloths and completely cover each solar power panel in the system.
26 in 24 posts thanks given.
Leaving solar panels disconnected for 6 months.
Disconnect all wires and let the water drain out of the panel.
There is not a problem.
By cutting off the sunlight.
Locate any water leaks in the pipes of the solar panel.
The solar cell you have installed provides about 1 3rd of an amp charging rate.