How do i effectively repair solar panels that have been surged

Hello. I have acquired several free solar panels. I mean alot!!! 400+

I would like to understand exactly how my solar panels work?

From cell to cell voltage, how to measure current and voltage.

If any ohms should go through a diode or not ( i know it should only go one direction, but is there minute ohms possibly in the other direction)?

And is there a way to measure voltage from diode to diode to see were the damage is in the cell loop?

And any relevant info that i could use.

I am prepared to measure and remove bad cells and replacewith new ones and reseal the entire panel

Thanks sincerely