In reply to Hooo:
> It's more the re-connecting I worry about. Fiddling around in a little cupboard trying to get a 6mm2 cable into a small terminal is a bit worrying when said cable could deliver 8A or so.
> Although, as you say it's no problem if you're careful. I once reconnected it all and got out of the van only to see that the cover had blown away and the panel was in full sun
It might be capable of delivering 8A, but unless you've got multiple panels in series, the max voltage will be about 40 - 50v... 48V DC is the upper limit of what's considered safe for DC. You'd get a nasty shock if you stuck them in your mouth, but through dry skin you'd be lucky to feel a tingle.
The only real danger would be if you connected it next to the vent of a charging lead acid battery and managed to blow it up with the spark - but that could just add easily happen when disconnecting first. Best avoided by not having your LB & charge controller in a dodgy configuration.