DIY Solar Oven

Today I’m going to give you an easy way to cook in a do-it-yourself solar oven. Understand that I do so only in the name of independence as circumstances may prevent you from having access to a commercially made solar oven. However, if I had a choice between using my own homemade solar oven and a commercial one, I would go commercial any time. Why? Because the commercial solar ovens I recommend are specifically made to handle rugged third world conditions. They are intended for cooking everyday for a number of years (5-15, depending on which model you get). The DIY solar ovens are not likely to last that long, be as sturdy, or handle as much volume as a solar oven you may purchase commercially.

There are three key components to a solar oven. 1) You’ve got to have sun. So long as you have enough sun to cast a shadow, you can cook in a solar oven. It doesn’t matter the temperature outside as long as you have a suitably constructed solar oven. 2) You need a way of insulating the heat from the sun. This is typically done with dark colors which attract and absorb the sun, combined with layers of insulation which will keep the heat in the sun oven container. 3) You need a seal of some sort that allows the sun rays to get through but keeps the heat in (and small critters out). A reflector is not essential in solar cooking as they merely direct the available sun, making the heat more intense. So you can use a reflector or not, depending on the time you have available for cooking. It won’t affect the fact that you can still cook in a solar oven. So, now that you know what the components are, let’s talk about a DIY solar oven.

Spray paint a Mason jar. Photo c/o

Spray paint a Mason jar. Photo c/o

The easiest DIY solar oven I use requires a Mason jar, a roasting bag, a block of wood, some black BBQ grill paint, and a twisty tie. Simply spray paint the outside of the jar (lid and all) with the black BBQ grill paint. (Note: I put a strip of masking tape down the side of the jar when I spray paint it so that I can have a visual on how the food is cooking inside.) Then place the jar on top of a block of wood with the lid on it and place everything inside a large roasting bag. I also recommend that you put an oven thermometer inside so that you can keep an eye on the temperature inside the bag. Seal the top of the roasting bag with a twisty tie. Place your package in the sun, and cook away.

The roasting bag acts as your seal to let the sun through but keep the heat in. The block of wood allows the hot air to circulate, even under the jar. The dark paint on the jar is to attract the sun’s heat and light. You can cook in a small jar, a half-gallon size or even put multiple jars in a roasting bag. Bottom line is with a DIY solar oven, you can cook without the use of fuel on a sunny day. Simply put your ingredients in the jar and cook. You don’t need to stir or babysit it. Just keep it exposed to sun. So long as you’ve got a temperature in there of 180 degrees or more, you’re cooking.

Another common way to make a solar oven is out of the bottom of a thick box used for shipping apples to the grocery store. Paint the OUTSIDE of the box with the BBQ grill paint, then line the inside of the box with something dark to absorb the heat and help with insulation. I recommend lining it with dark colored towels (you can staple the lining in). Then cover your open box with a heavy pane of plexi-glass or tempered glass like you would use to cover a coffee table. Put a covered, dark, thin-walled pan with your food inside the box and cook away.

Dark, thin-walled pans like this are ideal for cooking with in your solar oven. Photo c/o

Dark, thin-walled pans like this are ideal for cooking with in your solar oven. Photo c/o

I recommend using a lid on your cooking pan whenever possible when cooking in a solar oven. It ensures that the moisture and the nutrients stay a part of your dish. If you don’t have a dark, thin-walled pan and lid, put your food in a regular Pyrex casserole dish, cover it well with foil, and place a dark towel on top. The foil is to keep the moisture inside the dish and act as a seal. But foil exposed by itself will simply reflect the sun’s rays away—which is why we put the reflectors in our car windshields during the summer. Putting the dark towel on top of it helps to absorb the heat instead of deflecting it.

Solar cooking with a DIY solar oven usually takes longer cooking time than a well-built commercial one. But it’s better than not having that option. And besides, the kids seem to get a kick out of being able to do it yourself.

Join us on Facebook

Follow us on Twitter here

To see our upcoming event schedule, click here

Subscribe to Preparedness Pro today and never miss a thing!

For any questions or comments on this article, please leave a comment on the blog site so that everyone can benefit!

Copyright Protected 2009, Preparedness Pro and Kellene. All Rights Reserved. No portion of any content on this site may be duplicated, transferred, copied, or published without written permission from the author. However, you are welcome to provide a link to the content on your site or in your written works.


© 2019 Of COURSE this post is Copyright Protected by Preparedness Pro. All Rights Reserved. NO portion of this article may be reposted, printed, copied, disbursed, etc. without first receiving written permission by the author. This content may be printed for personal use only. (Then again, laws are only as good as the people who keep them.) Preparedness Pro will pursue all violations of these rights just as vigorously as she does any of her other freedoms, liberties, and protections.


Very clever! We have a commercial solar oven and use it, but what a relief to know how simple a back-up method can be implemented if needed.

A lot of people have unused, 10 ft satellite dishes in their yards. Lining them with aluminum foil and pointing them at the Sun produces almost 2000 degrees temperature. With a little modification, a cast-iron crockpot can be mounted at the focal point of the dish and will cook/fry/bake/boil in short order.

Bruce, you’re talking about a parabolic cooker, not a solar oven. They are a bit trickier to make, but yes, very doable, and yes, the do get DANG hot, so be careful.

Thanks Kellene for this post, I am making some of these for Christmas gifts to get family members to think about getting more prepared.

Another Multi-tasker, been thinking about getting one of those cold canners. Silly me I wanted to use Cast Iron. Great once it heats up but thinking about it I would more energy heating the pot instead of the food.
Thanks again

Great item to throw in your BOV. I got a field expedient solar cooker I want to try out. Just having a devil of a time finding those auto solar shades. Gosh they used to be everywhere now that I want one none are around.

have you tried checking out walmart,hardware stores, or even drug stores? it might also depend on which state you live,too. i'm in FL, so they have them year round.

Mason jar and roasting bag, how hot did it get? After how much time? did you just measure food temps or ambient temp.?

It stayed at about 200-250 degrees inside the bag. Remember you’re cooking food at 180 degrees and above.

What types of food did you cook and how long does it take?

There are a couple more articles on here about solar oven cooking in which I address a lot of those kinds of questions. Enjoy!

Interesting! Never knew one could build their own.


Please note that the name you use in the "Name" field above will be the name displayed on your comment.