work quite well even for bread making. It takes about an hour and a half to bake 3 loafs of bread. You should not try solar baking when it is overly-cloudy, but, on a clear day, you should be able to ideally knock-out about 9 to 12 loafs with un-interrupted sunshine. Our commercial solar box oven ran right around $300 I think, so for 24 people to have a daily half-loaf of bread will involve an investment of say 15 bucks each. You could certainly build your own box oven for less if you have the expertise. One of my current projects is to build a self-tracking solar oven. This will be powered by a small solar PV panel, and will automatically turn to face the sun in the morning, and then track the sun all day. The advantage of this is that you can leave your solar oven up, and whenever during the day you wish to, you will have a preheated oven ready to bake in. No more running out every 20 minutes to move the oven back into the sun, it'll already be pointing at it. This will allow greater control over cooking temperatures. Also, it seems very possible that with a little tinkering, one should even be able to adjust the temperature of the oven by how obliquely the sensor is tracking the sun. If it is just a little bit off focus, you should be able to select just about any temperature you want to maintain. Our current non-tracking solar oven works wonderfully, and will cook just about any meal including roasts It makes the very best solar soymilk, but be aware that soy tends to boil-over if not watched.