bob_nestor wrote:
That controller looks like it's the same kind used on my cheap 120W portable. It's permanently wired into the back of the unit, so in my case the last thing hooked up is always the battery. I've had it set up in the sun without a battery connected without a problem. On a recent camping trip I had it set up and it ran fine for a week keeping my batteries up. The only warning I saw was to make sure the battery leads never touch.
Interesting point.
I doubt mine died because of the order of connection. But I mentioned it in the interest of full disclosure.