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Frequently Asked Questions
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→ PRODUCT FAQ
→ WEATHER AND CLIMATE
→ MAINTENANCE
→ SAFETY
→ DIY BUILDING
→ INNOVATION
PRODUCT FAQ
| Device | Dish | Quantity | Baking / Roasting / Cooking Time | Pre-Heating Time | Daily production |
|---|---|---|---|---|---|
| PRO Oven | Bread | 18-22 kg | 1 hour | 1 hour | 110 kg max depending on recipe |
| Buns | 50 buns | 30 min | 1 hour | 500 buns | |
| PRO Roaster | Peanuts | 16 kg | 3 hours | 1 hour | 16kg or more |
| PRO Cooker | Rice | 10 kg | 1 hour 5 min | None | Case specific |
| Water sterilization | 15 liters | 30 min to boil | None | Case specific |
Ask for our case studies in Kenya and Uganda.
If you live in a sunny country with good sun several months a year, you can save quite a lot of money with Lytefire for sure. We help you to calculate your future savings with the calculator. Hopefully you’ll chose Lytefire to replace the gas, LPG, wood or charcoal you use daily.
We are often asked on which ground should Lytefire Solar Oven be installed and if a ring in concrete is indispensable.
For the ring, it really depends on the nature of the ground where you’re planning to use your solar oven. The ground has to be flat enough for the wheels to move smoothly and steady enough to support the weight (which is between 400kg and 570kg depending on the model).
It also have to stay strong when it rains in order to prevent the equipment from slightly sinking and performing less.
And of course, you do not want any shadow on your Lytefire so no walls, trees or buildings around.
Here are a few examples of installations around the world.
Lytefire is easy to fix and maintain. Our different manufactured Lytefire models will last between 14 to 16 years. Since it’s all stainless steel, it is solid and adapted to daily usage. It’s also easy to clean: only water and soap to clean the mirrors from time to time, and inside your oven.
The different sizes of Lytefires yield different amounts, as well as the baking technique. Currently, only the small Lytefire is available for the African and French markets, with 5m² of mirrors.
Baking technique: Using bread tins/pans improves greatly the efficiency of baking as compared to regular bread baking. This is because the surface of the bread tin will transmit the heat quicker to the bread, and with the tins a lot more dough can be fit into the same oven as opposed placing bread loafs without tins.
It is possible to add a base (sole) by placing it on the original grids. Some artisans have added up to 70kg of bricks inside to prevent temperature drops. But by adding weight, the oven will no longer take 45min-1h to heat up but a little longer (1h30).
With your Lytefire, you can bake a maximum 18-22kg (up to 48 pounds) of sourdough bread per hour using bread tins, meaning up to 100kg of that bread per sunny day. This means an intense day of baking for you as you need to track the sun manually. Sourdough bread as NeoLoco is doing get almost no kneading and it’s great for bread conservation. Meaning that if you do not wish to use tins and if you wish to knead, the quantities of baked bread can be significantly lower, like 30 to 40kg per day.
When it comes to African baguette (length 40cm and without the French crunchy touch), it’s possible to bake batches of 45 to 48 baguettes.
Don’t hesitate to contact us to understand more in depth how to optimize your Lytefire oven.
WEATHER AND CLIMATE
Yes and no :)
Yes because you need a clear sky! No necessarily blue but clear. And it doesn’t have to be warm for you to use the Lytefire. In Normandy, France, Arnaud bakes in winter with -4°C (24°F) using Lytefire Deluxe Big Oven + Roaster. We’ve been testing solar cooking in Finland with -2°C (28°F) with great results with one Lytefire DIY Community Solar Cooker.
No. You need a clear blue sky for the Lytefire to work. If it’s a fresh spring day, a hot summer morning or a sunny winter afternoon, the Lytefire’s can be used whenever there is direct sunshine. But diffuse radiation does not work and in cloudy weather, there is no direct radiation.
If you’re not sure you can check your region here: https://globalsolaratlas.info/map
Remember that NeoLoco’s solar bakery is in Normandy, North France. Arnaud runs the oven a few days per month to bake and roast, 10 months per year. This allows him, and others new solar artisans, to generate a steady revenue.
The cold does not prevent Lytefire to work at all. Lytefire has already operated at negative temperatures in Switzerland and Finland! All it takes is clear skies. The temperature doesn’t matter.
We’ve been testing solar cooking in Finland with -2°C (28°F) with great results with one Lytefire DIY Community Solar Cooker.
The wind circulates nicely between all the mirrors to prevent boat sail effect and it is possible to use the Lytefire in moderate winds but we advise to limit its use from 60km/h of wind. Beyond that, we recommend placing your mirrors in a safe position, facing the ground. If the wind is beyond 70km/h, we recommend dismantling the mirrors rows and store them safely inside.
On our Hub, which has a forum to support DIYers and many resources, including video tutorials, there is a thread for builders about wind-proofing with design suggestions for areas with strong winds.
Lytefire can be used everywhere. We have used Lytefire in the most Nordic Finland, to locations right on the equator like Kenya. So we can safely say: The Lytefire can be used anywhere on the planet whenever there’s sun! After that, it all comes down to which use you wan to make out of it.
MAINTENANCE
2mm and 3mm thick mirrors are normally easy to find in almost any middle-size town. We recommend the 2mm thickness.
No matter if you build it yourself or if you purchased it, you’ll learn from us how to replace the mirrors (with tutorials, at distance guidance, or by direct on-site explanation). Don’t worry if a mirror breaks, it happens. You’ll see it’s easy to replace it. We always include a few spare mirrors in any case.
Acrylic plastic mirror could work and it could be cheaper and lighter than glass but we haven’t had results on their life cycle!
SAFETY
– It is recommended to use sun glasses every time you cook or bake with solar energy, that’s for sure!
– As for any stove or fire, you never leave the device unattended.
– To test the Lytefire and check if it’s well focused, you will place a wooden stick on the focal point. Careful, it can be 900°C (1650°F) at the focal point so you will never allow anyone to place their hand or cross if the Lytefire is on. The wooden stick will burn well, probably with flames and everybody will suddenly see the “solar fire”. This will allow all the users, friends and family to see that people must be aware of that power.
– Sometimes, people also put a fence around the Lytefire, mostly to prevent chicken from getting too nervous with their reflections.
Lytefire works exactly as with a barbecue, a stove or an open fire: you don’t let that unattended, right? So someone should always stay close to the Lytefire when it’s in use.
There is an "Off position" for all the Lytefire’s and it’s when the mirrors are all facing the ground. Once you are no longer using the Lytefire, you can simply tilt all the mirrors down so they no longer reflect the sun, and then there is no longer any risk just like when you turn off the electricity or pour water on an open fire.
Apart from some roosters getting nervous when seeing themselves in the mirrors and attacking their reflections, we have no report of animals being endangered by Lytefire.
The reason is that when not in use, all the mirrors are facing the ground with no sun on it. During usage, the solar rays are all targeting the focal point, where you cook, and not anywhere else.
As for any stove, barbecue or fire, you do not leave the device unattended.
As for any stove, barbecue or open fire, you do not leave the device unattended. If you show the burning stick to your kids, they will get that they are not supposed to play around.
DIY BUILDING
The Lytefire DIY Stove is a vertical solar concentration system through an upward reflector, and the Lytefire DIY Oven, Lytefire Deluxe Oven + Roaster and Lytefire Deluxe Big Oven + Roaster are direct horizontal solar concentrators. The upward reflector causes efficiency loss. The less time light needs to change directions the better. So with the Lytefire Oven design there is only one reflection.
Build times differ greatly based on available tool set, workshop permanence, fabricator experience and the kind of music you’re listening to.
The following estimates are based on 1) having the basic tool set, the three jigs, as well as grinder, drill press, vice grips, C-clamps and metal chop saw, 2) 1 competent fabricator and a dedicated workspace, and 3) all material onsite.
For a Lytefire DIY Stove, a setback-free build can take 32 hours to 40 hours. For a Lytefire DIY Oven, 10 to 12 days is reasonable.
You can seriously decrease that amount of time by putting on some good music and inviting enthusiast friends.
A variety of materials are required for the build. You can access the list after your purchase. We attempt to describe where to purchase the requisite materials.
Steel: all structural steel profiles for the Lytefire should be available from most steel retailers. The stainless steel for the oven might be more difficult to find, but most sheet metal retailers or distributors should be able to help.
All fasteners (screws, nuts, bolts, rivets) should be available at any big hardware store.
Mineral wool or glass wool insulation should be available at most large building centers.
2 or 3 mm mirrors are available at many custom glass workshops. Cheap mirror is available at recycled home works stores (for example, Habitat for Humanity ReStore in North America). Also, Walmart has 4 foot by 1 foot bedroom mirrors for $7.99CAD that are 2mm thick mirror and yield 4 mirrors each, compared to $5CAD per mirror cut by local Toronto glass shop)
Most of the bits and pieces (for example, wheels, latches, hinges, drill bits, cutting disks, etc) are available at big hardware stores like Home Depot.
Every single thing is listed and detailed in the Lytefire DIY Stove and Lytefire DIY Oven construction manuals.
We cannot recommend any retailer nor give indication of price because it varies so much from one place to the other.
That being said, in France, all the material for a Lytefire DIY Oven with oven is between 3 000€ and 4 000€ max.
For Lytefire DIY Stove the costs are much lower as it requires less materials. In Canada the materials for Lytefire 4 are around 800€.
A professional welding level is needed and if you’re not there yet, you can simply learn. It’s not very hard but it has to be well done.
INNOVATION
Concentrating the sun’s rays to convert them into heat is really nothing new and you can do it with a magnifying glass, everyone knows that. What’s new with Lytefire is our applications and design that aim to bring direct solar heat to entrepreneurs, school canteens, cooperatives and communities to carry out food processing using clean, powerful and free energy. The idea is to get people to smoothly adopt Lytefire wherever they need it while making a living with it and participating in the energy transition.
Like everything in this life, it’s a choice. At the time of the industrial revolution, decision makers decided to go with fossil fuels and then electricity, which shaped part of the world as we know it: constant energy availability, speed, storage and... the well-known collateral damages. In the 1970’, various countries started to study and experiment solar thermal but funding have been discontinued to favor solar electricity. This is great but most of human’s energy needs are in direct heat, and we do not absolutely need electricity for everything, especially food transformation. And this is true everywhere the sun shines. The time for more solar thermal energy is now.
Our focus is on collective uses and entrepreneurship. You can find one huge solar concentrator in Font Romeu in France, solar plants in Spain and individual solar cookers and boxes reaching 400 Watts with relatively cheap price and even free plans. All this is great for sure and we encourage you to explore different options! Our mission at Lytefire is to spread widely a powerful tool. Lytefire can serve professional and semi-professional baking, roasting and cooking users, it can be installed in canteens, hotels, festivals, campgrounds, it creates sustainable jobs in the Global South and it also inspires pioneers entrepreneurs in countries where the grid is good and the electricity is cheap.
It doesn’t pollute when you use it.
It gives you access to a free and unlimited energy (reduced energy bills!).
It creates no smoke and no dark particles damaging your health and the air.
Any meal can be cooked or baked with the same flavor.
It fights deforestation.
Read more about our impact here.
It’s time to clarify an important point about Open Source.
We believe in all the virtues of open source, but because of its limitations, we decided not to embrace that path. We are explaining our model in this article that you can read here.
We designed the oven, the cooker and the roaster to cook and roast quantities useful to entrepreneurs (artisan bakers) or groups (canteens, associations, cooperatives) and it is in these contexts that Lytefire gives the best results. So it’s a solar cooker yes and no, and you can read more here.
