Always be careful working with electricity!
This is a step up for me. Mostly, my electric car has been running at 96V or so.
Chances are that this solar system will be somewhere between 250 and 500 volts or so. That means being a "real" electrician. No shortcuts - actually do things right. It will end up having several disconnects, etc.
This is HIGHER than household current, and DC to boot! (more sparks! More Fun!)
Covering panels when working on them is always a good idea. I learned that working with solar hot water. On a sunny day, ten minutes in the sun made panels hot enough to burn your hand on!