A typical bus is apparently about 40 ft x 7.5 ft, giving a roof are of roughly 28 sq m. Southern California gets roughly 5 kWh/sqm/day on average (though much

A typical bus is apparently about 40 ft x 7.5 ft, giving a roof are of roughly 28 sq m. Southern California gets roughly 5 kWh/sqm/day on average (though much less in the winter). Electric school buses apparently have batteries of about 100-300 kWh, so a dollar panel on the roof could get a 5% charge on a good day. That doesn't really make sense, when maintaining, cleaning, and setting up more efficient tracking solar on roofs (you need a huge parking lot for all those school buses afterall) or in solar farms would be easier, cheaper, and more efficient