Last year we bought a solar oven, for two reasons: 1) So we can cook if the power goes out, and 2) so we can cook without heating up our house on hot days. All summer I've been trying out various recipes, and this morning I prepared a dinner recipe that needed to simmer all day. The weather report promised clear skies by 10am. It lied.
I couldn't even see a ghost of a shadow until 2pm, but even with so little sunshine the solar oven managed to heat up to 150 degrees. I was impressed that it could double the outdoor temperature on a cloudy day, but that still wasn't enough to cook our dinner. I had to finish it in the oven inside. Good thing it wasn't a hot day.