Temporary solar panels are interesting to me - where I live there's a large chunk of the year where weekly solar output plummets. Stacking them in the garage overwinter is appealing, I might try this soon.
Meh. Throw a moving blanket over it and bungee it on. Could weld up a cart to roll them all at once sideways. Could use spring casters like for gates as a suspension. Or hold them in place with low durometer rubber. Or both. Probably want them sideways for footprint in my garage anyhow. It would be fun to optimize the process more each year.
My property is very small and I currently use that back space to park my nice car during the winter so the daily is in the garage and the front driveway is easier to plow. Sounds weird to me typing it out, but I promise this arrangement makes more sense when living here.