Solar cells on an outhouse? Yup. In the coastal headlands of Marin County.
We see these in the Sierras (the mountains) as well, in some high-traffic publicly-accessible areas of the wilderness. Usually the solar cells in the mountains are powering fans that circulate air into a composting toilet (one that composts the deposits rather than requiring removal to another location). And they’re generally so far from civilization that running a power line would be ludicrous.
But it always seems funny to me.