100-Watt Solar Panel Price Guide: Explore Types, Pros, Cons, and Working

The 100-watt solar panel price in India in 2025 can range between ~Rs. 4,500* to ~Rs. 7,000* if you purchase a single polycrystalline module from premium brands. However, the prices aren’t fixed. They depend on multiple factors, including the cell technology used and the reputation of the manufacturer. 

Needless to say, if you buy 100-watt monocrystalline panels from reputable solar panel manufacturers, it’s going to cost you slightly more than poly panels.

*Please note: The above-mentioned 100-watt solar plate prices are indicative and not fixed. The final 100-watt solar panel price depends on panel type, brand, cell technology used, market demand of the module, GST inclusion, offers by the manufacturer, etc. Prices are subject to change. SolarSquare does not endorse, sell, or manufacture 100-watt solar panels. We install on-grid rooftop solar for housing societies, homes, and commercial complexes using higher-wattage solar panels.

The 100-watt solar plate price is worth it for those seeking a portable power generation station. This allows you to keep necessary gadgets, such as phones and flashlights, charged in remote locations. Additionally, it enables charging a lithium battery, which can power small devices like lights and fans in small off-grid sheds. 

However, if you want to use these panels to build on-grid rooftop solar panel systems for homes, housing societies, or commercial complexes, they’re not the ideal options. Higher-wattage bifacial solar panels are recommended to build kW-scale solar systems. 

If you use something as small as a 100-watt panel to build large solar systems, you’ll need a lot of panels, lots of shadow-free space on the roof, and extra wiring and support. All these factors make 100-watt solar panels unsuitable for residential and commercial rooftop systems.

In this blog, we’ll break down the 100-watt solar panel price for different types of panels, their working, benefits, advantages, and specifications. We’ll also explain why using a 100W PV panel is unsuitable for building on-grid solar systems for residential and commercial installations. 

TL;DR Summary Box: How Much Power Will a 100-Watt Solar Panel Produce?

Under standard test conditions (STC) in a lab where manufacturers test the efficiency of the solar panels, a 100-watt solar panel is rated to produce 100 watts of DC power output. In this state, where the panel is producing its maximum rated power, it can generate up to ~18-20 volts. 

However, in the real world, where the panel is subjected to sunlight fluctuation and cloud cover, the power output is generally lower than 100 watts. On a bright sunny day in the real world, the output can range between 70-85 watts, and the panel can produce between ~16-19 volts. 

Here are the main points covered in detail in this blog:

Main Topics	Quick Takeaways
What is the 100-watt solar panel price in India in 2025?	For polycrystalline modules: ~Rs. 4,500* to ~Rs. 7,000*  For monocrystalline modules: Up to Rs. 10,000*
What factors affect the 100-watt solar plate price?	Brand, GST inclusion, types of solar cells, manufacturer’s offer, and type of charge controller.
How does a 100-watt solar panel work?	It absorbs sunlight and uses the photovoltaic effect to convert it to electricity.
What are the types of a 100W PV panel?	Polycrystalline and monocrystalline panels.
What are the advantages of a 100-watt PV panel?	They can keep emergency devices like phones charged in off-grid locations.
What are the drawbacks of a 100-watt solar panel?	The power output decreases under cloud cover, and the panel isn’t suited for building kW-scale solar energy systems.
Is it worth installing an on-grid rooftop solar system at homes?	Yes. It reduces bills by more than 90%.

*Please note: The above-mentioned 100-watt solar plate prices are indicative and not fixed. The final 100-watt solar panel price depends on panel type, brand, cell technology used, market demand of the module, GST inclusion, offers by the manufacturer, etc. Prices are subject to change. SolarSquare does not endorse, sell, or manufacture 100-watt solar panels. We install on-grid rooftop solar for housing societies, homes, and commercial complexes using higher-wattage solar panels.

What is the Price of a 100-Watt Solar Panel?

The 100-watt solar panel price in India in 2025 can fluctuate significantly depending on the brand you purchase the product from. Solar panels from reputable manufacturers tend to cost more because those modules are high-quality products with longer and better warranties. 

Here’s an estimate of the 100-watt solar plate price in India in 2025 for mono and poly modules from premium solar panel manufacturers:

Types of 100-Watt PV Panels	100-Watt Solar Panel Price in India in 2025*
100-watt polycrystalline solar panels	~Rs. 4,500* to ~Rs. 7,000*
100-watt monocrystalline solar panels	Up to Rs. 10,000*

*Please note: The above-mentioned 100-watt solar plate prices are indicative and not fixed. The final 100-watt solar panel price depends on panel type, brand, cell technology used, market demand of the module, GST inclusion, offers by the manufacturer, etc. Prices are subject to change. SolarSquare does not endorse, sell, or manufacture 100-watt solar panels. We install on-grid rooftop solar for housing societies, homes, and commercial complexes using higher-wattage solar panels.

Factors that Affect the 100-Watt Solar Panel Price

No two 100-watt solar panels have the same price. The prices vary significantly based on the brand’s reputation and the type of solar cells used in the construction of the panel. Poly cells are less efficient than mono cells; hence, they cost less than the latter. 

Let’s check out all the major factors that influence the final 100-watt solar panel price:

• Brand and warranty: Reputable brands use the best quality products to build their panels. As a result, their modules last a lot longer and perform better than modules that are built using shortcuts. Therefore, the 100-watt solar panel price tends to be higher from reputable sellers.
• GST inclusion: Usually, a 12% GST is charged on solar panels in India. Check if a listed price already includes GST and shipping. This changes the final amount you pay.
• Types of solar cells used in the panel construction: Mono cells are more efficient than poly cells. Thus, monocrystalline 100-watt solar panels are more expensive.
• Offers by manufacturers: Sometimes, manufacturers offer discounts on the panels. Whether you buy the panel at discounted rates or full price can also impact the final 100-watt solar plate price.
• Whether the module is made in India or imported: Buying an imported panel might cost more because you’ll have to pay import duty.  
• Type of charge controller you purchase: DC output from solar panels can’t be used to charge devices directly. You will need a solar panel charge controller. This will also impact the final cost, as MPPT solar charge controllers are up to 30% more efficient than PWM charge controllers, but they are also more expensive.  

What is a 100W PV Panel and How Does it Work?

A 100-watt solar panel is a PV module that’s designed to produce a 100-watt DC output and ~18-20 volts under standard test conditions in a controlled laboratory environment. However, the real-world output ranges between 70 and 85 watts based on sunlight conditions. 

The power output by a 100W PV panel can be used to charge small gadgets like smartphones, power banks, and flashlights while you camp or hike in remote locations with no power grid supply. These panels can also be used to charge a 12-volt battery for boats, RVs, and small off-grid sheds to keep lights and small fans running whenever needed. 

However, you can’t power heavier loads like TVs, ACs, and full-sized home refrigerators using a 100-watt PV panel since 70-85 watts is too low to keep such heavy appliances running. 

How Does a 100-Watt Solar Panel Work?

The solar cells in a 100-watt solar panel absorb sunlight and convert it to DC output using the photovoltaic effect, where photons in the sunlight knock electrons in the solar PV cells loose. 

Let’s check out how sunlight is converted to DC power step by step: 

• Step 1 – Photons in sunlight strike solar cells in the solar panels: The silicon solar cells absorb the energy packets, photons. 
• Step 2 – Absorbed photons transfer their energy to electrons: Solar cells have electrons. When photons transfer their energy to the electrons, the electrons get energized and leave their place, leaving behind a hole. Hence, every photon that excites an electron results in the formation of an electron-hole pair.
• Step 3 – The solar cell’s built-in electric field keeps electrons and holes separate: The electric field at the p-n junction pushes electrons and holes in opposite directions. This results in the formation of usable voltage.
• Step 4 – Electrons always flow in one direction: When connected to a load, electrons flow in one direction through an external circuit. This unidirectional flow is nothing but the direct current (DC) output.
• Step 5 – The solar panel charge controller charges devices/batteries safely: The charge controller ensures voltage fluctuations at the panel’s end don’t end up damaging your devices and batteries. 

Do You Need a Battery With a 100-Watt Solar Panel?

You can use a 100W PV panel without a battery if you only need power while the sun is shining. However, if you want to keep your devices and gadgets powered through the night or need a reliable backup when it gets cloudy, you will need a battery. 

So, when should you use a lithium battery with a 100-watt solar panel?

• You want lights, a fan, or charging after sunset or on cloudy days.
• You want stable, safe power because solar output fluctuates with changes in cloud cover and sunlight availability.
• You’re setting up a small off-grid solar system for a room, shed, van, or camping.

What Are the Types of 100-Watt PV Panels?

The two main types of 100-watt solar panels are polycrystalline solar panels and monocrystalline solar panels. 

Let’s check out the details of both types:

Feature	100-Watt Polycrystalline Solar Panels	100-Watt Monocrystalline Solar Panels
What are they?	They’re made using polycrystalline cells.	They’re made using monocrystalline cells.
Efficiency	16-17%	19-20%
What affects their efficiency?	Polycrystalline cells are made by melting fragments or pieces of silicon, not an unbroken silicon ingot. This reduces the efficiency.	Monocrystalline cells are made using an unbroken and pure silicon ingot. It increases their efficiency.
100-Watt Solar Panel Price	~Rs. 4,500* to ~Rs. 7,000*	Up to Rs. 10,000*

*Please note: The above-mentioned 100-watt solar plate prices are indicative and not fixed. The final 100-watt solar panel price depends on panel type, brand, cell technology used, market demand of the module, GST inclusion, offers by the manufacturer, etc. Prices are subject to change. SolarSquare does not endorse, sell, or manufacture 100-watt solar panels. We install on-grid rooftop solar for housing societies, homes, and commercial complexes using higher-wattage solar panels.

There’s a very popular and latest-technology module, the bifacial module, which is majorly used to build kW-scale solar systems. We haven’t mentioned it as a type for 100-watt solar panels since bifacial modules are usually higher-wattage panels, not small ones like 100- or 200-watt solar panels.

Is a 100-Watt PV Panel Suitable for Rooftop Solar Systems for Homes?

A 100-watt solar panel is not suitable for building kW-scale solar systems. If you use them, you’ll need a very high number of panels to reach the desired capacity. 

Let’s take an example of a small 2 kW solar system for added clarity. 

If you use 100-watt PV panels to reach 2 kW capacity, you’ll have to use 20 solar panels. These many panels make reaching the desired capacity impractical because: 

• Additional wiring and structure increase the cost significantly: Wiring 20 panels together would require extra wiring and support. This will make the system a lot more expensive than it would be with higher-wattage solar panels.
• Installing so many panels is a significant space commitment: You will need ample shadow-free space on your roof. And most homes don’t have that kind of space.

100-Watt Solar Panels vs 550-Watt Solar Panels

Higher-wattage panels, such as 550-watt bifacial solar panels, are significantly more practical for achieving the desired system capacity compared to 100-watt solar panels. 

Here’s a comparison table to give you absolute clarity: 

Solar System Size	Number of 100-Watt Solar Panels Needed	Number of 550-Watt Solar Panels Needed
2 kW solar system	20	4
3 kW solar system	30	6
4 kW solar system	40	8
5 kW solar system	50	10
10 kW solar system	100	19

What Are the 100-Watt Solar Panel Specifications?

Here are the key specifications of a 100-watt solar panel: 

100-Watt Solar Panel Specifications	Details*
Power output (STC)	100 watts
Nominal voltage	12 V
Voltage at best output	~18-20 volts
Number of solar cells	~36
Cell type	Polycrystalline or monocrystalline

*Please note: These specifications are typical for fixed 100-watt solar panels, not the foldable models. Actual specifications can also vary significantly by brand and model. Always use the manufacturer’s datasheet for exact values. 

What Are the Advantages of a 100-Watt Solar Panel?

A 100-watt solar panel can be used to trickle-charge a 12-volt battery system for boats, bikes, and RVs. These panels produce DC output that can supply emergency charging while you’re camping or hiking in off-grid locations. 

Let’s check out all the advantages of using a 100-watt PV panel:

• It provides power to charge gadgets in off-grid locations: You can use the power generated to charge small gadgets like power banks, flashlights, smartphones, tablets, and even LED lights using a solar panel charge controller.
• It can trickle-charge small batteries: You can charge your car or bike batteries using the panel’s output through a charge controller. You can also buy a 12-volt lithium battery and keep it charged. This stored solar renewable energy can be used to keep gadgets and small appliances charged and running on a cloudy day or at night.
• It is eco-friendly: Solar panels use sunlight to produce electricity. They do not emit carbon while working. Solar electricity is absolutely clean and reduces your carbon footprint. 
• It operates silently while generating electricity: Solar panels do not produce noise while working. Hence, they do not cause noise pollution. 

What Are the Disadvantages of a 100-Watt PV Panel?

The power output from 100W PV panels is weather-dependent and insignificant when it comes to building kW-scale solar systems.

Let’s check out all the major disadvantages of 100-watt solar panels in detail:

• Panel output reduces on a cloudy day: Under cloud cover or shade, the DC power produced drops significantly. You will need a battery with stored energy during such days to keep your appliances and gadgets running and charged. 
• Power output is too low to be used for kW-scale solar systems: Higher-wattage modules are recommended. 100 watts isn’t practical for such large solar energy systems.
• You’ll need a charge controller: This adds to the cost since you can’t plug your devices or batteries straight into panels.  
• Panel charges devices slowly: Don’t expect the fast charging that wall chargers offer. 100-watt solar panels will charge your devices and battery, but they’ll do that slowly.

What Are the Applications of a 100-Watt Solar Panel?

A 100-watt solar panel can be used to charge batteries for RVs, cars, and boats. They can also provide power to keep appliances like lights and small fans running in small off-grid cabins. 

Let’s check out all the major applications of a 100W PV panel in detail:

Application	Details
Camping and road trips	You can use these panels to charge phones, power banks, a small DC fan, LED lanterns, and action cameras.
Small off-grid rooms/ sheds	Use the power to run a couple of LED lights and charge phones. The power can also keep a Wi-Fi router or small DC fan going with a battery.
Vehicle battery maintenance	You can use the 100-watt solar panel to trickle-charge/maintain 12 V car or bike batteries via a charge controller.
Remote security cameras	Use the panel’s output to power a low-power IP camera and a 4G/LTE router at a gate, farm, or construction site.
Emergency kit	Charge phones, radios, and a small LED light during power cuts.

What is the Cost of Installing On-Grid Rooftop Solar Systems in India?

Installing an on-grid rooftop solar system at homes in India in 2025 can cost somewhere between ~Rs. 90,000* in Lucknow for a 2 kW solar system and ~Rs. 5.62 lakh* in Bengaluru for a 10 kW solar system after you get a subsidy under the PM Surya Ghar Muft Bijli Yojana. 

*Please note: The above-mentioned solar plate price is indicative as of 18th August 2025 for the SolarSquare Blue 6ft variant. The final PV solar system installation cost depends on your DISCOM charges, product variant opted for, panel type, inverter type, mounting structure height, type of after-sales service, savings guarantee, roof height, etc. Prices are subject to change. 

Here’s a tabulated snapshot that compares the installation cost in India with and without a subsidy:

Solar System Size	Solar Panel Price in India Without Subsidy (Starting price – Indicative for base variant)*	Solar Panel Price in India With Subsidy (Starting price – Indicative for base variant)*
2 kW solar system	~Rs. 1.8 lakh in Lucknow to ~Rs. 2 lakh in Bengaluru	~Rs. 90k in Lucknow to ~Rs. 1.40 lakh in Bengaluru
3 kW solar system	~Rs. 2.10 lakh in Lucknow to ~Rs. 2.35 lakh in Bengaluru	~Rs. 1.02 lakh in Lucknow to ~Rs. 1.57 lakh in Bengaluru
4 kW solar system	~Rs. 2.55 lakh in Lucknow to ~Rs. 2.85 lakh in Bengaluru	~Rs. 1.47 lakh in Lucknow to ~Rs. 2.07 lakh in Bengaluru
5 kW solar system	~Rs. 3.10 lakh in Lucknow to ~Rs. 3.70 lakh in Bengaluru	~Rs. 2.02 lakh in Lucknow to ~Rs. 2.92 lakh in Bengaluru
10 kW solar system	~Rs. 5.80 lakh in Lucknow to ~Rs. 6.40 lakh in Bengaluru	~Rs. 4.77 lakh in Lucknow to ~Rs. 5.62 lakh in Bengaluru

*Please note: The above-mentioned solar plate price is indicative as of 18th August 2025 for the SolarSquare Blue 6ft variant. The final cost of installing an on-grid rooftop solar panel system at home depends on your DISCOM charges, product variant opted for, panel type, inverter type, mounting structure height, type of after-sales service, savings guarantee, roof height, etc. Prices are subject to change. 

Initial Investment vs Solar Savings in 25 Years

Installing an on-grid solar system is quite beneficial in India because it reduces the electricity bills by at least 90%. Since well-maintained systems last for 25+ years and grid electricity tariffs increase by 3-6% annually, having a solar system take care of energy requirements results in tens of lakhs of savings. 

Here’s a simple head-on comparison between solar system installation cost vs solar savings in a city like Nagpur: 

Solar System Size	Solar Panel Price in Nagpur With Subsidy (Starting Price – Indicative for Base Variant)*	Solar Savings in Nagpur in 25 Years*
2 kWp	~ Rs. 1.15 lakh	~ Rs. 11.05 lakh
3 kWp	~ Rs. 1.32 lakh	~ Rs. 16.58 lakh
4 kWp	~ Rs. 1.77 lakh	~ Rs. 22.11 lakh
5 kWp	~ Rs. 2.27 lakh	~ Rs. 34.43 lakh
10 kWp	~ Rs. 5.02 lakh	~ Rs. 68.86 lakh

*Please note: The above-mentioned solar plate price is indicative as of 18th August 2025 for the SolarSquare Blue 6ft variant. The final cost of installing an on-grid rooftop solar panel system at home depends on your DISCOM charges, product variant opted for, panel type, inverter type, mounting structure height, type of after-sales service, savings guarantee, roof height, etc. Prices are subject to change. Additionally, while calculating savings, we have considered the annual tariff escalation at 3% and the annual degradation at 1%. The actual final savings from solar panel installation depend on the types of solar panels you’ve installed and their efficiency, intensity of sunlight your rooftop receives, orientation of the panels and tilt angle, the pollution level and weather conditions in your city, the temperature, shadow on the roof, impact of dirt/dust, and how well you maintain your panels after installation.

Want to check how much money going solar can save in your city? Use SolarSquare’s free rooftop solar calculator to get an estimate now.

Conclusion

A 100-watt solar panel produces up to 100 watts of DC output under standard test conditions. It can be used to charge and run small loads like phones, power banks, and LED lights. However, the output is insufficient to run heavier loads, such as ACs, TVs, and refrigerators. 

If you want to reduce your electricity bills by 90% or more, you need an on-grid solar system made from higher-wattage solar panels. For any further information, you can contact SolarSquare today. 

FAQs

Q1. How much can a 100-watt solar panel charge?

Ans. On a clear day, a 100-watt PV panel makes about 0.4-0.6 units (kWh) of energy. That’s enough to keep phones, lights, and a small DC fan going.

Q2. How long does it take to charge a 12V battery with a 100-watt solar panel?

Ans. It can take anywhere between 4-12 hours to trickle-charge a 12-volt battery with a 100W PV panel. However, the actual time taken can vary significantly from the said range based on sunlight strength and temperature.

Q3. Can a 100-watt solar panel run a TV?

Ans. No, a TV is a heavy load which can’t run on the power output produced by a 100-watt solar panel.

Q4. Can a 100-watt solar panel run a fridge?

Ans. No. The power output from a 100W PV panel is too small to run heavy loads like full-sized kitchen refrigerators.

Q5. Is a 100W solar panel worth it?

Ans. If you’re looking for a charging station to keep necessary gadgets and lights charged and running in off-grid locations while camping or hiking, a 100-watt solar panel is worth the investment.

Q6. What factors affect the output of a 100-watt solar panel?

Ans. The most critical factors that affect the output of a 100-watt solar panel include sunlight strength, cloudy conditions, shade, and tilt and panel orientation.