mag274

i'm a firefigher. we were told these units always have a charge even if you shut off the panel to the unit. the only way to prevent getting shocked was to kill the power to the unit and actually cover them so the sun can't get to them.

could you elaborate on some safety precautions that can protect us when working on a roof that has panels?

How did you feel about Philip Zimbardos testimony on the abuse? (http://www.ted.com/talks/philip_zimbardo_on_the_psychology_of_evil.html)