Solar Cooker in India: Working, Types, Price, Uses, Advantages and Disadvantages

A solar cooker is an appliance that utilizes sunlight as an energy source to cook food.

The best part is that a basic solar cooker does not need LPG or electricity while it is cooking in good sunlight. The Sun is doing the main job.

But does it really work for normal Indian food? Can it make roti? What happens on a cloudy day? Is there any government subsidy?

People are still asking these questions because most of us have seen a solar cooker in a school project, but very few have actually used one regularly at home.

We know that cooking is one of the most essential activities in our daily life where a lot of fuel is consumed. So, if sunlight can do even part of this job, it is worth understanding how it actually works.

Solar cooking is a direct use of solar energy. It does not mean that a solar cooker can completely replace your LPG stove or induction cooktop.

Its usefulness depends on the type of cooker, available sunlight, food you want to cook and how much time you have.

This article will discuss all information about solar cookers, their working principle, types, price, advantages and disadvantages.

We will also look at the present situation in India and answer the practical questions that matter before you decide to buy or use one.

What is a Solar Cooker?

A solar cooker is a device to cook, heat, dry and bake food using sunlight instead of burning a cooking fuel.

In a traditional box or dish cooker, sunlight is used directly as heat.

A reflective surface sends more sunlight toward the cooking area.

A dark pot absorbs that solar radiation and becomes hot.

Insulation or an enclosed cooking chamber then reduces heat loss.

You can simply think of it as a small oven that gets its heat from the Sun instead of LPG or electricity.

So, is a solar cooker the same as a rooftop solar system?

No.

A traditional solar cooker uses solar heat directly.

Rooftop solar panels first convert sunlight into electricity. That electricity can then run an induction cooktop or another appliance.

Both use the Sun, but the energy path is different.

How Does a Solar Cooker Work?

The basic working principle of a solar cooker is to convert sunlight into heat energy and retain it to raise the temperature to a level suitable for cooking.

If you think that the hot summer air itself cooks the food, then that is not correct.

The solar radiation reaching the cooker is doing the main job.

This is why a solar cooker can work well on a clear sunny winter day also.

There are three basic steps involved in solar cooking.

1. Concentration and Reflection of Sunlight

The reflector directs more sunlight towards the cooking pot or cooking chamber.

In a box type solar cooker, the reflector increases the amount of sunlight entering the box.

A parabolic solar cooker works differently.

Its curved reflector concentrates sunlight on a much smaller area where the cooking pot is placed.

This is why a parabolic cooker can produce much higher heat.

Do you know what will happen if a solar cooker is used without a reflector panel?

The cooker may still receive sunlight, but less solar energy will reach the cooking area.

A properly positioned reflector increases the heat input and helps the cooker heat up faster.

2. Absorption and Heat Generation

Dark colored surfaces absorb solar radiation better than shiny and light surfaces.

That is why the inside of a box solar cooker and the outside of its cooking pots are usually black.

What happens to this absorbed sunlight?

The dark surface absorbs the solar radiation and converts it into heat. This heat then passes through the cooking pot and heats the food inside.

So conduction helps in transferring heat through the pot. It is not the process that converts sunlight itself into heat.

This small correction is important because the old article said that sunlight was converted into heat by conduction. Pasted text

3. Heat Retention

Generating heat is not enough. The cooker must also retain it.

The insulation around a box cooker reduces heat loss, while the transparent glass cover allows sunlight to enter and helps keep the heated air inside.

This allows the cooking chamber to remain hot for a longer time.

Official descriptions of box cookers also identify insulation, glazing, a reflector and black cooking surfaces as the basic elements of the design.

Just imagine what will happen if a box cooker has poor insulation or the glass cover does not close properly?

Yes, you guessed it right!

More heat will escape into the surroundings and cooking will become slower.

This is why even a simple solar cooker needs a clean glass cover, proper insulation and correctly placed cooking pots for good performance.

What Can You Actually Cook in a Solar Cooker?

This depends on the type of cooker.

A box solar cooker is good for slow cooking such as rice, dal, vegetables, khichdi, idli and eggs.

You can also use it for baking items such as bread, biscuits and cake when sunlight is adequate.

MNRE also lists these foods among the items that can be prepared in solar cookers.

Can you fry food or make roti?

A normal box cooker is not the best choice for frying or making normal tawa style roti. The reason is simple.

A box cooker heats food slowly and generally works at a lower temperature.

A concentrating dish cooker is different. It focuses sunlight on the cooking vessel and can produce much higher heat.

MNRE states that dish cookers can be used for roasting, frying and boiling.

There are also newer indoor solar cooking systems.

IndianOil states that its Surya Nutan system can boil, steam, fry and bake, including making rotis.

It can also use auxiliary energy when solar energy is not enough.

So, can a solar cooker cook normal Indian food?

Yes, but you have to select the right type of cooker.

A box cooker may be fine for dal, rice and vegetables.

If you want frying or roti, you need a cooker designed for higher temperature cooking.

How Much Time Does a Solar Cooker Take?

What about cooking time?

MNRE says a box solar cooker may take around 2 to 5 hours depending on the quantity of food, solar radiation and weather conditions.

This is why you should not compare a normal box solar cooker directly with an LPG stove.

Suppose you put dal and rice in the cooker at 11 in the morning on a clear sunny day.

You may leave them to cook slowly while doing other work. But the same food may take longer on a winter day or when clouds keep coming between the sun and the cooker.

Do not plan your meal around one fixed cooking time because the actual result changes from day to day.

Advantages and Disadvantages of Solar Cooker

Is a solar cooker really useful at home?

Yes, it can be useful. But it also has some practical limitations. You should know both before buying one.

Advantages	Disadvantages
A basic direct solar cooker does not consume LPG, firewood or electricity while adequate sunlight is available.	Most basic models depend strongly on sunlight.
No fuel is burned in the cooker during direct solar cooking.	A box cooker normally cooks much slower than an LPG or electric stove.
Running cost can be very low after buying the cooker.	You need a sunny and safe place to keep the cooker.
A box cooker can cook slowly with little attention once it is properly positioned.	Clouds and sudden weather changes can increase cooking time.
Different designs can boil, bake, roast or fry food.	Dish cookers need proper alignment with the sun and may require tracking.
Simple box cookers have few moving parts and are generally easy to use.	Concentrated sunlight and hot cooking vessels can cause burns if handled carelessly.
Solar cooking can reduce the use of conventional cooking fuel when weather conditions are suitable.	A basic solar cooker cannot normally meet all cooking needs at night or during poor weather.

One important point is often missed.

A solar cooker does not necessarily have to replace your LPG stove or induction cooktop.

Think of it as another cooking option.

On a good sunny day, you may cook rice, dal or vegetables in the solar cooker and save some LPG.

At night, during rain or when you need food quickly, you can use your normal stove.

For many homes, this practical combination makes more sense than expecting a basic solar cooker to handle every meal.

What Are the Types of Solar Cookers?

You may have seen a simple box solar cooker in a school science project. But are all solar cookers like that?

No.

Solar cookers are now available in different designs depending on how much heat is required, where the food is cooked and how many people have to be served.

The current MNRE solar cooker page broadly divides solar cooking systems into four categories.

1. Box Solar Cooker
2. Concentrating Solar Cooker
3. Advanced Indoor Solar Cooker with heat storage
4. Community Solar Cooker

Let us understand them one by one.

1. Box Solar Cooker

For domestic use, the box solar cooker remains the simplest design to understand.

A basic model consists of an insulated box with a transparent glass cover, a reflector and dark colored cooking pots.

The black surfaces absorb solar energy and convert it into heat. The glass cover and insulation then help retain this heat inside the cooker.

MNRE describes a solar box cooker as operating at around 100°C.

Can you cook normal food at this temperature?

Yes. Rice, dal, vegetables and many other foods can be cooked. But you have to be comfortable with slow cooking.

For example, you cannot place dal inside a box solar cooker at 12 noon and expect it to behave like a pressure cooker on a gas stove.

Solar radiation, weather, food quantity and the position of the cooker all affect the cooking time.

This is why a box cooker is suitable when you can plan your cooking in advance.

It is not the right choice if you expect instant frying or fast cooking like a gas burner.

There are also Indian standards for box solar cookers.

BIS lists IS 13429 Part 1: 2020 for the requirements of box type solar cookers. You can check the BIS product information.

If you are buying a box cooker, do not look only at its shiny reflector and outer appearance.

Ask the seller about its construction, testing, warranty and cooking capacity.

2. Concentrating or Parabolic Solar Cooker

A parabolic solar cooker works differently.

It uses a curved reflective dish to concentrate sunlight near the cooking vessel. Since more solar energy is focused on a smaller area, the heat can be much higher than in a box cooker.

This makes parabolic cookers useful for cooking methods such as boiling, frying and roasting.

But does higher temperature mean that a parabolic cooker is always better?

Not necessarily.

A parabolic cooker needs good direct sunlight and proper focusing.

The dish also needs to be adjusted as the position of the Sun changes.

Care is also required during use because the cooking vessel and the concentrated focal area can become very hot.

MNRE states that concentrating solar cookers operate above 100°C.

Its FAQ also explains that dish cookers can achieve much higher temperatures at the bottom of the vessel when sunlight is properly focused.

Does Higher Temperature Mean Faster Cooking?

Many people look only at the maximum temperature while comparing solar cookers.

But this can be misleading.

Suppose one cooker reaches a very high temperature when it is empty. Will your rice also cook extremely fast?

Not always.

Actual cooking depends on sunlight, reflector area, alignment, wind, heat loss, cooking pot, food quantity and the amount of useful heat reaching the food.

So while comparing solar cookers, do not check only the maximum temperature printed by the manufacturer.

Also check what quantity of food it can cook and how much time it normally takes under actual sunlight.

3. Advanced Indoor Solar Cookers

This is where solar cooking has changed considerably.

Earlier, when somebody said solar cooker, most of us imagined a black box kept outside in direct sunlight.

But what if you want to cook inside your kitchen?

New systems can collect solar energy outside and allow cooking inside.

Some designs can also store energy for later use and use another energy source when solar energy is not sufficient.

One Indian example is IndianOil Surya Nutan.

IndianOil describes Surya Nutan as a stationary indoor solar cooking system.

It can use solar energy along with an auxiliary energy source and is available in single burner and double burner versions.

Can you make normal Indian food on it?

According to IndianOil, the system has been tested for boiling, steaming, frying and baking, including rotis.

IndianOil also says that cooking time during field testing was comparable with LPG for the tested cooking requirements.

This is very different from keeping a box cooker on your terrace.

So whenever you compare the price of solar cookers, first check what type of system you are comparing.

A simple box cooker and an indoor solar cooking system with energy storage are completely different technologies.

4. Community Solar Cookers

What if you have to cook for hundreds or even thousands of people?

A small household solar cooker will obviously not work.

This is where community solar cooking systems are useful.

Large concentrating dishes can collect solar energy and use it to produce steam.

This steam can then be supplied to a community kitchen for cooking large quantities of food.

One of the best known Indian examples is the Shri Sai Prasadalaya at Shirdi.

Its official website describes a system with 73 solar dishes.

These dishes produce around 4,200 kg of steam in a day and support the preparation of nearly 50,000 meals using solar energy.

Just imagine the difference.

At home, you may be trying to cook one vessel of dal with sunlight. At Shirdi, concentrated solar energy is being used to generate steam for a very large kitchen.

This clearly shows that solar cooking is not limited to a small box used for school projects.

What About Panel and Vacuum Tube Solar Cookers?

You may now have one question.

What happened to panel solar cookers and vacuum tube solar cookers?

They have not disappeared.

You may still find such designs in the market. However, the current MNRE page uses broader categories while explaining solar cooking technologies.

A panel solar cooker normally uses several reflective panels to direct sunlight towards a dark cooking pot.

The pot may also be placed inside a transparent enclosure to reduce heat loss.

A vacuum tube solar cooker uses an evacuated glass tube. The vacuum between the glass layers reduces heat loss and helps the cooking chamber retain heat.

The important point is that solar cooker designs can vary considerably between manufacturers.

So instead of buying a cooker only because someone calls it a panel cooker, vacuum tube cooker or advanced solar cooker, check what it can actually do.

Ask simple questions.

How much food can it cook?

Does it require direct sunlight?

Does it need regular Sun tracking?

Can it fry food or only boil and bake?

Can it work when clouds pass over?

How long does normal cooking take?

And most importantly, will its cooking style actually suit your family?

That practical answer is more useful than the name written on the product.

Do you want to see how a panel solar cooker looks in real life?

You can check this model on Amazon India to understand its design, current price and availability.

Solar Cooker Price in India

Now comes the question most people ask. How much does a solar cooker cost in India?

There is no single market price because a basic box cooker and an indoor solar cooking system are completely different products.

Prices also change with size, material, cooking capacity, tracking system, delivery and warranty.

Type	Current price indication checked in September 2026	What to remember
Box solar cooker	One current Solar India box model is listed around Rs 6,460	Simple domestic models can vary by size and construction
Parabolic cooker	Rudra Solar Energy lists parabolic systems from about Rs 15,000 upward, with larger systems costing much more	Ask about reflector size, capacity and tracking
Surya Nutan indoor system	₹12,000 base model and ₹23,000 top model in 2022. Current price is not fixed.	Use the current vendor list and ask for a written quotation
Community solar cooking	Project based price	Capacity, steam system and installation make a large difference
Panel or vacuum tube models	Model specific	Check actual cooking capacity, warranty and replacement parts

These are current product examples, not an official India wide price benchmark. Always check the latest quotation before buying.

Is There Any Government Subsidy on Solar Cookers in India?

This needs a clear answer because many old articles about solar cookers still mention government subsidies.

The Indian government promoted solar cookers through subsidy programmes in earlier years.

So you may still find old websites, documents or advertisements mentioning subsidies on box type or dish type solar cookers.

But is there any general subsidy available today for buying a solar cooker at home?

The current MNRE solar cooker page does not mention any general household subsidy amount for purchasing a solar cooker.

IndianOil also clearly states on its current Surya Nutan page that no government subsidy has been declared for Surya Nutan.

So what should you do if a seller tells you that a subsidy is available?

Ask for the name of the current scheme and the official government notification.

Do not buy a solar cooker only because an old article or advertisement says that a subsidy is available.

Government schemes can change. It is always better to check the latest information from MNRE or the concerned government department before buying.

Will a Solar Cooker Work on Cloudy Days or in Winter?

A basic solar cooker needs useful sunlight to cook food properly.

You may think that a very hot day should always be good for solar cooking. But this is not necessarily true.

Suppose the outside temperature is 35°C, but the sky is covered with thick clouds.

The cooker may receive much less solar radiation even though the weather feels hot.

On the other hand, a clear and sunny winter day can sometimes give better solar cooking conditions than a hot but cloudy day.

So the important thing is not only the outside temperature. The amount of sunlight reaching the cooker matters more.

In winter, the useful cooking period may also become shorter because the Sun remains lower in the sky and daylight hours are shorter.

Box and parabolic cookers therefore need some planning.

What happens if clouds suddenly come while your food is cooking?

Cooking will slow down and you may need another cooking source to finish the food.

Advanced systems with heat storage or auxiliary electricity can handle such interruptions better. But these systems are more complex and also cost more.

Can I Use a Solar Cooker on a Balcony or Terrace?

Yes, but the place must receive enough direct sunlight.

A terrace is usually a better option because it has more open sky and gives you more freedom to position the cooker towards the Sun.

Can you use it on a balcony?

Yes, if strong sunlight reaches the balcony for enough time during your normal cooking hours.

Here is a simple way to check.

Stand on your balcony around the time when you normally prepare lunch. Look at the place where you want to keep the cooker.

Is sunlight falling directly there?

Or is the sunlight blocked by another building, balcony, wall, tree or railing?

This simple check can tell you much more than only looking at the direction of your flat on a property plan.

A parabolic cooker needs some additional care because the reflector concentrates sunlight strongly.

You need enough open and safe space around the cooker and cooking vessel.

A deep shaded balcony is therefore not a suitable place for a direct solar cooker, even if the weather outside is very hot.

Why Are Solar Cookers Still Not Common in Indian Homes?

This is an interesting question.

India receives plenty of sunshine in many regions. Then why do we not see a solar cooker in every house?

The answer is practical.

Think about your own cooking routine.

Do you make breakfast early in the morning?

Do you prepare dinner after sunset?

A traditional solar cooker cannot help much at these times.

Box cookers also take more time than an LPG stove. Urban homes may not have a sunny terrace.

A parabolic cooker needs open space and occasional adjustment towards the Sun.

Cloudy weather can also disturb cooking.

Does that mean solar cookers are useless?

No.

Suppose a family has an open terrace and someone is at home during the day.

Rice, dal, vegetables or other slow cooking items can be prepared using solar energy on a good sunny day.

In such a case, the solar cooker can reduce some LPG or electricity use.

For most homes, it is therefore more practical to treat a traditional solar cooker as a secondary cooking system rather than the only cooking system.

Newer indoor solar cooking systems are trying to solve some of these problems by using heat storage and auxiliary energy.

IndianOil’s Surya Nutan is one example. It can store solar heat and can also work with an auxiliary energy source when required.

Solar Cooker or Rooftop Solar with Induction?

These two things sound similar, but they work in completely different ways.

A direct solar cooker uses sunlight to produce heat for cooking.

A rooftop solar system first converts sunlight into electricity. That electricity can then run an induction cooktop or another electrical appliance.

So the energy path is different.

In a solar cooker:

Sunlight → Heat → Cooking

With rooftop solar and induction:

Sunlight → Electricity → Induction Cooktop → Heat → Cooking

So, which one is better?

That depends on what you already have at home.

If you have a sunny terrace and want a simple system for daytime cooking, a direct solar cooker may be useful.

If you already have rooftop solar and sufficient daytime generation, an induction cooktop can be much more convenient because you can cook inside your normal kitchen.

But there is one more question.

Can your existing solar system actually handle the induction cooktop together with the other appliances running at home?

That depends on the size of your solar system, available solar generation and the power requirement of the induction cooktop.

You can check this using the BharatGoGreen What Can My Solar System Run Calculator.

This is a different calculation from direct solar cooking, but it can help you understand whether using your rooftop solar for electrical cooking is practical in your home.

Solar Cooker Safety

A solar cooker has no gas leak or open flame during normal direct solar cooking. But does it mean that there is no safety concern at all?

No.

The cooking pot, glass cover and other parts can become very hot. Always use gloves or a thick cloth when removing a hot pot or opening the cooker.

You should also be more careful while using a parabolic solar cooker. It concentrates sunlight at one point and the temperature at this area can become very high.

Never look directly at the bright reflected sunlight and keep your hands away from the focal area.

If children or pets are around, do not allow them near a parabolic cooker while it is in use.

What about wind? A large reflector can catch the wind easily.

So always place the cooker on a stable surface and make sure that the reflector cannot suddenly move or fall.

If you need to clean or adjust a concentrating cooker, first turn the reflector away from the Sun.

This simple step can make handling much safer.

What Should You Check Before Buying a Solar Cooker?

Are you planning to buy a solar cooker?

Do not start with the price. First think about how and when you actually cook at home.

If you have a sunny terrace or an open area that receives good sunlight during cooking hours, a solar cooker can be useful.

But if your balcony remains shaded for most of the day, even an expensive solar cooker may not give you the result you expect.

Also think about the food you normally prepare. Rice, dal and vegetables can be cooked quite comfortably in a box cooker if you have enough sunlight and time.

But if you regularly want to make roti, fry food or cook quickly at high temperature, you may need a concentrating type cooker.

Cooking capacity is another point that is easy to miss. A solar cooker may look quite large in a photograph, but the actual space available for cooking pots can be much smaller.

Check the usable cooking capacity and not only the outside dimensions.

If you are buying a box type solar cooker in India, ask the seller whether the product follows the applicable BIS standard.

The current BIS standard for box type solar cookers is IS 13429. Also check the warranty and whether replacement glass, seals and other parts are easily available.

For a parabolic cooker, ask one more question. How often will you need to adjust it towards the Sun?

Also check how the focal area is protected so that a person does not accidentally touch the high temperature zone.

And what about subsidy?

Do not assume that every solar cooker comes with a government subsidy.

Schemes can change with time and may also differ from one state or programme to another.

If a seller is promising a subsidy, verify it from MNRE or the concerned government department before buying.

One more practical point is often forgotten.

Keep another cooking option at home. A solar cooker depends on sunlight, so cloudy weather, rain and night cooking will always need an alternative.

Is a Solar Cooker Worth Buying?

This is probably the most practical question.

If you have a sunny terrace, cook at least some meals during the day and do not mind planning your cooking a little earlier, a solar cooker can be useful.

For example, suppose you normally cook rice and dal for lunch at around 1 PM.

On a good sunny day, you can put the food in a box cooker earlier and allow it to cook slowly while you do your other work.

But what if you return home at 8 PM and normally start cooking dinner at that time?

Then a basic direct solar cooker will obviously not help you much.

A box cooker is more suitable for slow cooking. A parabolic cooker can provide much higher heat and can also support cooking methods such as frying and roasting, but it needs more care while handling and usually needs better sun tracking.

So the real question is not only, does a solar cooker work?

Yes, it works.

The better question is, does this type of solar cooker fit the way you cook at your home?

If the answer is yes, it can reduce some of your LPG or electricity use. If the answer is no, buying one only because sunlight is free may not make much sense.

Conclusion

I hope that the above information about solar cookers helped you understand their basic working principle, uses, types, advantages and disadvantages.

Solar cooking technology has changed a lot from the old box cooker that many of us remember from school science projects.

Today, we have box cookers, concentrating cookers, advanced indoor solar cooking systems with heat storage and large community solar cooking systems.

But one basic fact has not changed.

Sunlight still matters.

The place where you install the cooker, the time at which you cook, the type of food you prepare and the amount of sunlight available at your location will decide how useful a solar cooker is for you.

Can a solar cooker completely replace LPG or an induction cooktop in every home?

For most families, probably not.

But does that make a solar cooker useless?

Again, no.

If you have good sunlight and some of your cooking can be shifted to daytime, a solar cooker can reduce the amount of purchased energy used for cooking.

In such a case, you are simply making useful energy out of sunlight that was otherwise going unused.

Do you own a solar cooker?

What do you actually cook in it? How much time does rice, dal, vegetables or roti take at your location?

Please share your practical experience below. It can help other readers understand where solar cooking really works well and where it does not.

References

1. Ministry of New and Renewable Energy, Government of India. Solar Cookers. New Delhi: MNRE, Government of India, 2026.
2. Bureau of Indian Standards. IS 13429 Part 1: 2020: Solar Cooker, Box Type, Specification. New Delhi: Bureau of Indian Standards, 2020.
3. Indian Oil Corporation Limited. Surya Nutan: Indoor Solar Cooking System. New Delhi: Indian Oil Corporation Limited, 2026.
4. Shri Saibaba Sansthan Trust, Shirdi. Solar Steam Cooking System at Shri Saibaba Sansthan. Shirdi, Maharashtra.
5. Solar Cookers International. Solar Cooking Basics and Safety Guidance. Sacramento, California: Solar Cookers International.
6. Ghodake, D. “A Review Paper on Utilization of Solar Energy for Cooking.” 2016.
7. Joshi, S. “Solar Cooker: A Review.” 2017.
8. Ministry of New and Renewable Energy, Government of India. Renewable Energy Technologies and Solar Thermal Applications. New Delhi: Government of India.

Disclaimer: This article is for general information only and should not be treated as a buying recommendation. Product prices, specifications and availability may change with time. Some links in this article may point to Amazon India or other online marketplaces. BharatGoGreen may earn a small commission if you purchase through an affiliate link, at no extra cost to you. Please check the latest product details, warranty, applicable standards and seller information before making any purchase.