Paul Clancy wrote:
If concerned about winter in Michigan your solar will be covered in snow. I'd take the batteries out. Store at home on a battery tender.
Not for long if the module is tilted. I live in Central MN where we get 48"snowfall on average. Typical 6" drop of snow is melted by the following day and runs off. I did remove some snow from directly under the module's lower edge, once. That was a period of lots of wet snow that froze on the roof before melting.
I swear solar does a better job of charging and floating batteries than I can, manually. SG measurements are always spot on. Besides, I hate lugging batteries around.