I’ve tried making my own, with moderate success. Unfortunately, wanted something light weight, that could be put away when not in use, yet capable of handling pretty much anything – and nothing I made came to that. They were big and bulky.
So I turned to commercially made and my first was a solar flare parabolic cooker which was fortunately cheap as it was far too limited.
Then my slow cooker died and it was replace or really go solar.
hence the Sunflair portable solar oven kit. So simple, once you see it, you will see how you can make it for far less. Its maybe too light weight, a good gust of wind will send your meal into the next county. and unlike the for more expensive Sun Oven, it only gets to between 200-225F depending on its alignment to the sun. So as a slow cooker, its perfect.
The Sun oven gets over 300F.
The kit came with two racks, two trays, 2 silicone cooking pots and one larger metal pot to be used as a roaster or saucepan as well as a thermometer and a carry bag to put it all in.
With shorter winter days, and our eating our main meal at noon, this will have some use to re-heat food cooked the previous day. During the summer, the days are long enough to allow for cooking for mid-day eating.
Today made rice – one cup brown rice, 2 cups water. have no idea how long it took, put it up and went about my business. When I realized the sun was getting low, about 3 hours later, went out to find it done, and still warm though the oven temp was all the way down. It wouldn’t burn, it can’t overcook. So pot roast, chicken, stew, beans, can be cooked all day, then reheated the next for dinner.
The one caveat is always use a sealed / covered container. heated chicken today in an open roaster (a precooked rotisserie chicken) and the moisture condensed on the inside of the plastic and acted as a cloud, cutting the temperature significantly. It would have been okay with another hour at that temp, or in a cooking bag or covered pan to keep that from happening.
This unit comes with instructions for cooking bacon, eggs, making omelets and even using it as a dehydrator. Can see it starting to show wear and tare with every day use though, while at the same time, can see how to keep it working one way or another for a long time to come.