Solar cookout in 20 degree weather

Solar cookout in 20 degree weather
A solar cookout in Feburary

It was the end of a cold but clear day, Feb 1st and after playing with some batteries for most of the day, it was time to eat. I set up the rotisserie and cooked some burgers. They were fully cooked in only a few minutes. It seems that even with sunlight filtered by trees and the late winter sky, the thing will cook a burger as fast as a microwave.