Thing is Steve, I know you could take me to one side, spend an hour or 2 with me and I'll know all I named know.
Failing that a chat with someone else or a quick search ont tinterweb and away I go.
So why do a course?
Your beginning to sound like one of our other much loved training providers.
I disagree. Why would / should someone with the knowledge give it away free? I did some solar panels a couple of weeks ago. Wanting to be safe and not knowing much about it, I asked the question on here, did some research on the internet and asked an installer.
The information I gained was inconsistent at best, ranging from: nothing to worry about just do it. To: do not do it you might die. And pretty much everything in between. All from seemingly credible sources.
This issue is wildly different from any window cleaning safety issue as solar panels are more of an unknown quantity.