After work yesterday the sun was out full and the controller read 13.1. cooler always 31-37 it seems. The panel was giving 3.00 amps to battery @ that time.
I went into the cooler a few times at intervals to get

This morning it was 12.3. The sun was almost going to hit the panel through the trees a bit as I left.
Just info. Almost could run perpetually with full sun but not quite. See what the cover does and then maybe install 2 new batteries but that could wait a bit.
Report back in a week or so on the cover.