Solar Cooking
Last edited: 7 January 2020      

The All Seasons Solar Cooker captures the sun at any angle.

The ASSC Advantage. Capturing the first morning sun

ASSC focused at 85º solar elevation

Folded ASSC weighs less than 1.15kg

All Season Solar Cooker diagram - December 2009.jpg

My (Jim La Joie's) goal is to have an established solar cooking agency adopt the All Season Solar Cooker as its own.

If your mission is to promote solar cooking and introduce the most cost efficient designs, to pasteurize a greater quantity of water, and to cook a greater amount of food on any solar day, please continue reading.

I have tested the All Season Solar Cooker (ASSC) against commercially available panel and box cookers. Because of its ability to efficiently capture the rising sun, the All Season Solar Cooker pasteurizes more water in a single solar day.

I recently tested the ASSC against the world famous CooKit. The test involved pasteurizing water. The only variable was the design of the cooker. Both were reoriented once per hour. When the water in a cooker reached 160º the container was emptied and filled with fresh cold water.

At the end of the day, the ASSC had produced 8 liters of safe water. The CooKit had produced 4.

The key design feature of the ASSC is its adjustable, coordinated reflector array. The ASSC, working from one of two initial orientations "summer/midday" or "winter/morning", can focus on a solar elevation of 40º to 90º (summer) or 0º to 50º (winter). The ASSC accomplishes this while maintaining a level cooking floor at all times. The advantage of the ASSC is that it can efficiently capture the earliest morning sun - starting cooking far earlier than most other designs. The solar cook can obtain cooking-level temperatures from sunup to sundown.

The ASSC folds into flat package that is very light weight for easy transportation and shipping.

The low cost and high efficiency of the All Season Solar Cooker make it a great choice for solar cooking agencies’ distribution programs.


  • January 2020: Jim La Joie offers 100 free solar cookers to individuals traveling to Africa - The cost of shipping the All Season Solar Cooker (ASSC) to Africa is far greater than any one person company can afford. The most reliable means of getting ASSCs to their intended destination in is to have them included as baggage for air travelers. Therefore, if you regularly travel to Africa or are planning a trip to Africa, please contact Jim regarding receiving an ASSC. He will provide the ASSC, boxed and ready to go. You will pay for shipping to your location in the United States (usually less than USD 15), and will take the ASSC package as checked luggage. You will work together with Jim to find an appropriate contact person in the country to which you are traveling. Email Jim La Joie...
  • September 2019: Jim La Joie reports that the All Season Solar Cooker is now being manufactured in Zimbabwe as well as in the USA.
  • January 2019: GoSun woos outdoor cooks with Fusion's solar power - TechXplore

All Season Solar Cooker 2.0

All Season Solar Cooker 2.0

  • December 2015: Great news: After nearly 10 years of trying to get an international aid agency interested in the ASSC design, we have finally been approached and have sent samples to Nairobi, Kenya. Our web site continues to be popular with readers from over 140 countries visiting each month. This past year we have discovered a number of unsolicited video reviews for both the manufactured and home-built versions of the ASSC. We could not be happier that users have honored the design with their video testimonials.
  • August 2013: Recently the All Season Solar Cooker has received increasing interest from those interested in disaster preparation and survival. Preparation and Survival groups have hosted workshops and have been building the ASSC from plans or from blanks purchased from the inventor. We are nearing production of a retail grade All Season Solar Cooker. Machine cut and covered, the newest model sports a slightly larger cooking area (12" by 12" vs. 11" by 11") to accommodate commonly available glassware and pots. The new combination of glassware and pots includes the 3 pound cooker from SCI and two 4 quart Pyrex mixing bowls.  Education and some sales are handled through, and the ASSC is now available through Amazon. We continue our international outreach efforts and are working with agencies to support their solar cooking promotion efforts.

Test results


See also

Audio and video

  • April 2016: 

Solar Cooking the easy way

Solar Cooking The Easy Way


Early morning solar cooking

October 2014:

July 2014:

August 2013: (Parts 1 & 2)

March 2009:

Buy an All Season Solar Cooker

External links


Jim La Joie