Hi John,
Thanks for explaining it instead of just having a pop.
I'd read and watched lots of people test open circuit solar panels that way to see if all the connections had been made, so I maybe stupidly thought it would be fine.
I think as you say, I got lucky this time if it's not the right way to test them, and I'm definitely heeding everyone's warnings, and reading the tone.
But again, thank you for taking the time to explain properly and politely, it is, as always, very much appreciated.
Thank you.