by Matt Gillespie November 21, 2016 14 Comments

Which types of solar cookers are all-season solar cookers? As the weather dips in the fall, we’re often asked how exactly these stoves can cook so effectively even in the cold. To answer this and other questions, we’ve created a handy FAQ.
  

All-season solar cooker: How do solar vacuum tubes work? 

Air is pulled out of a double-layered borosilicate glass tube and permanently sealed, forming a vacuum. This highly specialized process results in some unique properties, the most important being thermal insulation. Light can be absorbed by the internal layer of the tube and stored as heat. Without air to transfer heat from the inside of the tube to the outside, the vacuum provides near perfect insulation from the cold. 
 

Is it really an all-season solar cooker? Can they cook during the winter? 

Yes, very well in fact! The GoSun Sport has been shown to cook hot meals at temperatures below 10°F (-12°C) with no problem aside from the time required to preheat.
 

How much longer does the GoSun cooking technology take to cook during the winter? 

Cook times during the winter may increase your cooking time by as much as 15 minutes, while the tray and tube come to temperature. The GoSun truly is an all-season solar cooker, but cook times are definitely affected by weather and sun conditions. Once this point is reached the stove cooks as quickly as a warm summer day. 
 
GoSun Sport Solar Stove | Using a solar vacuum tube GoSun cooks anything even during the Winter!
 

Why does the GoSun cook faster on some winter days than a summer day?  

There are two main reasons solar cooking during the winter can lead to faster cook times: air quality and reflection.
 
Air Quality: As any winter sportsman can attest to, sunburn is not exclusive to warm weather. In fact, cold mountain air holding little moisture to diffuse the light, makes for direct and intense sunlight. Put simply, the thinner the air, the stronger the power of the sunlight.
 
Reflection: When cooking on a snow covered slope, particularly with the low angle light of dawn and dusk, the snow often acts as a reflector, multiplying the total amount of light entering the stove. More light means faster meals. 
 

How can I better utilize my all-season solar cooker in the winter?

Open Sparingly: Opening the stove becomes more costly as the environment becomes colder. Just set a timer and check when the recipe should be approaching completion.
 
Use Steam As An Indicator: To check the status of your food without opening, watch for steam. Steam rendering from the GoSun Sport typical indicates food is near completion. This is especially the case for vegetables and bread.
 
Store Your Stove Indoors: Skip an extended preheating cycle by simply keeping you stove inside rather than in the garage.
  
Stay Inside: Have a sunny window? You’re in luck! Just place your stove facing outward. It may take longer due to some window’s UV coatings… but then again you’re inside.
With GoSun, you can start cooking with the Sun year round, anywhere the Sun shines, regardless of the cold!
 
GoSun Sport solar oven
Matt Gillespie
Matt Gillespie

Matt Gillespie is an industrial designer, permaculture educator, and co-founder of GoSun. He has lectured periodically on permaculture, crowdfunding, and renewable energy technology at the University of Cincinnati's DAAP and Mother Earth News Fairs across the country. An avid gardener, cyclist and outdoor explorer, Matt brings his passion for connecting and serving others to the GoSun Team.


14 Responses

Ryda M. Stuart
Ryda M. Stuart

July 25, 2018

How do I guage the temp. that I am cooking my food at? Just guess? Guys this is now how you should cook. How do you reduce/control temps? Got the damn unit, what do you want me to do make stews?

LaDonna
LaDonna

November 29, 2017

I love the work you are doing too improve the environment and help impoverished people’s to cook with out fossil fuels. I would love to be part of this incredible company!!!!

Wade
Wade

November 18, 2017

My favorite place to use my sport is the parking lot of my local ski resort Monarch Mountain, pop some grub in the tube, take a few runs, ski by the car for a hot lunch, wash it down with a cold beer. Best ski bum cooker out there, no need to worry about open flame. The support rails close right in my ski rack. Roof top cooking!

Wade
Wade

November 18, 2017

My favorite place to use my sport is the parking lot of my local ski resort Monarch Mountain, pop some grub in the tube, take a few runs, ski by the car for a hot lunch, wash it down with a cold beer. Best ski bum cooker out there, no need to worry about open flame. The support rails close right in my ski rack. Roof top cooking!

Art
Art

November 18, 2017

Once you start to use a GoSun it almost becomes addictive. It’s like the body can’t do without the food prepared from the GoSun, particularly vegetables. We use ours nearly everyday…

Elena
Elena

July 27, 2017

Hi,

I wonder where I can buy this device in Russia or in Spain.
Thanks
Elena

Leslie Piper
Leslie Piper

June 14, 2017

Mighty Gary….what a pleasure to see your picture and get info on this project. If you want I can stake out a spot for you to practice solar cooking from here in Border New Mexico….

The pix look great! all the best, Leslie

Israel
Israel

February 11, 2017

How much?

Tim
Tim

December 13, 2016

If you guys made a gosun grill that could also use electricity to heat up food when there is no sun, then I would be a customer so fast. I live in Seattle where you don’t get as much sun, in the winter the days are much shorter. The versatility of a combined electric and solar cooker would be awesome. Either built in or through accessory of some kind.

ROBERTO EK
ROBERTO EK

November 28, 2016

I want to buy it in Mexico, do you have a dealer?

rafael cruz
rafael cruz

November 22, 2016

solicito costosde los productos solares, mi correo es rafacruzulloita@hotmail.com
y rafa_cruzu@hotmail.com y de ser posible en convertirme en distribuidor aqui en Guadalajara, Mexico

Petra Moeller
Petra Moeller

November 21, 2016

I can’t wait to try this out. Let’s hope for a lot of snow here in the Rockies. We are at over 5000 feet and should be able to take advantage of the powerful sun.

Jeannette
Jeannette

November 21, 2016

Question: Does the Gosun stove have a built in thermometer?

Phillip Warner Sr.
Phillip Warner Sr.

November 21, 2016

Thanks for the info! This is really helpful stuff !!

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