What is a Solar Panel? Meaning, Types of Solar Panel 

This guide explains the solar panel meaning in simple terms, how solar panels work, the different types available, how long they last, their benefits and drawbacks, and roughly what they cost to install in India. Read time: about 6 minutes. 

Solar panels are becoming a common sight on Indian rooftops, but many people still wonder – what is a solar panel, exactly, and how does it turn sunlight into usable electricity? In this guide, we break down the solar panel meaning in simple terms, explain how solar panels work, and cover the different types, benefits, drawbacks and components you should know before going solar. 

What is a Solar Panel? 

A solar panel is a device that converts sunlight into electricity. It is made up of many small units called photovoltaic (PV) cells, usually built from silicon, a semiconductor material. 

When sunlight falls on these cells, they absorb the light’s energy and release electrons. This movement of electrons creates an electric current, which can either power appliances directly or be stored in a battery for later use. 

Types of Solar Panels 

There are four common types of solar panels used today: 

• Monocrystalline Panels: constructed from a single silicon crystal. They are highly efficient but often cost more, which is their main drawback 

• Polycrystalline Panels: made from silicon shards melted together. While cheaper, they are less efficient than monocrystalline panels 

• Thin-Film Panels: made by depositing a thin layer of photovoltaic material onto a surface such as glass or metal. They are lightweight and flexible, which suits curved surfaces or portable setups, but are generally less efficient than crystalline panels 

• Bifacial Panels: designed to capture sunlight from both the front and back of the panel, often generating more electricity than standard one-sided panels in the right installation. They typically cost more but can boost overall output 

How Do Solar Panels Work? 

The operation of solar panels can be broken down into a series of steps: 

1. Absorption of Sunlight: sunlight carries particles called photons. These photons hit the solar panel and excite the electrons in its material, usually silicon 

2. Photovoltaic Effect: as photons strike the silicon cells, they knock electrons loose from their atoms. This is called the photovoltaic effect, and it creates a flow of electric current 

3. Direct Current (DC) Generation: the loose electrons are captured and directed through metal contacts, creating direct current (DC) electricity 

4. Inverter Conversion: most appliances run on alternating current (AC), so the DC electricity generated by the panels passes through an inverter, which converts it to AC 

5. Electricity Distribution: the converted AC electricity powers homes and businesses. Any surplus electricity can be stored in batteries or sent back to the grid 

How Long Do Solar Panels Last? 

Most solar panels are built to last 25 to 30 years, with manufacturers typically offering a 20 to 25-year performance warranty. This does not mean panels stop working after that period – they simply degrade gradually, usually losing around 0.5% to 0.8% of their output each year. 

• By year 25, most panels still operate at roughly 80% to 88% of their original output 

• Panel quality, installation standards and local climate all affect how well a system holds up over time 

• Regular cleaning and periodic checks on wiring and connections help panels perform closer to their rated output for longer 

Advantages of Solar Panels 

Solar panels are an excellent choice for homeowners and businesses. Some of the advantages include: 

• Renewable Energy Source: solar energy is abundant and inexhaustible. Unlike fossil fuels, it does not use up finite resources, which helps reduce the environmental impact of energy use 

• Lower Electricity Bills: solar panels can reduce or eliminate your electricity bills, and excess energy can sometimes be sold back to the grid through net metering. Pairing solar panels with a battery system can reduce your reliance on the grid by up to 84% 

• Eco-Friendly: solar energy is clean and produces no harmful emissions or pollutants, making it an important tool in the fight against climate change 

• Low Maintenance: solar panels last 25 years or more and need very little upkeep, usually just basic cleaning to stay efficient 

• Energy Independence: solar panels reduce reliance on the utility grid, helping homeowners and businesses avoid rising energy prices 

• Incentives and Rebates: many governments offer subsidies and tax benefits to encourage solar adoption, lowering the cost of the initial investment 

• Increased Property Value: homes with a solar installation often command a higher resale value, since buyers factor in the savings on future electricity bills 

DID YOU KNOW? 

Also Read: Loan for Solar Panel Installation 

Disadvantages of Solar Panels 

Solar panels have many advantages. However, there are some disadvantages to consider as well. 

• High Initial Cost: solar panels are expensive to purchase and install, though costs have gradually decreased. There are also additional costs for the inverter, mounting system and other components 

• Weather Dependent: solar panels need sunlight to generate electricity, so output drops on cloudy days and stops entirely at night. This can make generation less predictable in some areas 

• Large Area Requirement: a rooftop or ground-mounted system needs a reasonable amount of shade-free space to produce meaningful power, which is not always available on every roof 

• Energy Storage Costs: using solar energy at night requires batteries, which add meaningfully to the overall system cost. Not every installation needs storage, but it is a factor to plan for 

• Efficiency Limitations: standard solar panels typically range from 15% to 22% in efficiency. Despite technological advances, panels still need a certain surface area to generate sufficient power 

• Environmental Impact of Manufacturing: while solar energy itself is clean, manufacturing panels requires significant energy, mostly to process silicon, and some components contain substances that need proper disposal to avoid environmental harm 

How to Choose the Right Solar Panel? 

With several panel types and brands available, a few practical factors can help you choose the right fit: 

• Efficiency rating: higher-efficiency panels generate more power per square foot, which matters most if your roof space is limited 

• Budget vs roof space: monocrystalline and bifacial panels cost more but need less space; polycrystalline and thin-film panels cost less but need more area for the same output 

• Local climate: panels with a good temperature coefficient perform better in hot climates, while flexible or thin-film options may suit uneven or curved surfaces 

• Brand and warranty: look for a manufacturer offering at least a 20 to 25-year performance warranty and a track record of reliable after-sales support 

• Inverter compatibility: confirm the panel works well with your chosen inverter, especially if you plan to add battery storage later 

• Installer credentials: choose an installer familiar with MNRE-empanelled or ALMM-listed components, particularly if you plan to apply for a government subsidy 

How Much Do Solar Panels Cost in India? 

Solar panel costs in India vary by panel type, system size, city and installer, but as a broad indication: 

• A fully installed residential rooftop system typically costs approximately ₹50,000 to ₹75,000 per kW, including panels, inverter, mounting and wiring 

• A common 3 kW home system generally costs around ₹1.5 lakh to ₹2 lakh before any subsidy 

• Under the central government’s PM Surya Ghar Muft Bijli Yojana, eligible households can receive a subsidy of ₹30,000 for a 1 kW system, ₹60,000 for a 2 kW system, and up to ₹78,000 for systems of 3 kW or larger 

• After applying this subsidy, a typical 3 kW system can bring the net cost down to roughly ₹70,000 to ₹1.2 lakh, depending on the installer and location 

• Some states also offer additional top-up subsidies, so it is worth checking your state’s rules alongside the central scheme 

PRO TIP 

Flexible financing, such as a solar loan or EMI plan, can help you spread out the upfront cost while you start saving on your electricity bill from month one. 

Solar Panel Components 

A general solar power system comprises several components that work together to generate electricity. 

• Solar Panels (Photovoltaic Cells): the heart of the system, converting sunlight into electricity. Monocrystalline and polycrystalline are the two most common module types, with monocrystalline panels being slightly more efficient but more expensive 

• Inverter: converts the DC electricity produced by the panels into AC electricity, which is what most household appliances use 

• Mounting System: a racking structure that holds the panels on rooftops or the ground at the correct orientation to capture sunlight 

• Battery Storage (Optional): stores excess energy generated during the day for use at night or on cloudy days, though it adds to the overall system cost 

• Electrical Wiring: connects all the components, carrying electricity from the panels to the inverter and then to the home or workplace 

• Performance Monitoring System: lets owners track energy production and spot problems early 

Before You Go 

As per Ministry of New and Renewable Energy, India receives solar radiation with an estimated potential of nearly 5,000 trillion kWh per year, making it one of the most solar-rich countries in the world. Solar panels are essential to the current shift towards renewable energy, though their high initial cost and dependence on weather remain the main factors to weigh before adopting solar. 

Fibe can help! With flexible solar financing options, you can invest in solar energy and upgrade your lifestyle, making it easier for you to achieve your financial goals. 

FAQs On Solar Panel 

1.  How long do solar panels last? 

Solar panels typically function well for 25 years or more. After this, they may still work but at reduced efficiency, often around 80%. Most solar panels come with a 20 to 25-year performance warranty. 

2.  Do solar panels need maintenance? 

Solar panels require very little maintenance. You mainly need to clean them occasionally to remove dirt that blocks sunlight, and periodically check that wires and connections have not loosened or been damaged. 

3.  Will solar panels work at night? 

Solar panels don’t work at night because they need sunlight to produce power. You can, however, store extra daytime energy in batteries or use net metering to send surplus power to the grid and draw it back later. 

4.  Can a solar panel work without the sun? 

Solar panels can generate some power on cloudy days, since they only need ambient light rather than direct sunlight. Their efficiency will be much lower than on a clear, sunny day, and they do not work in complete darkness. 

5.  What is the meaning of a solar panel? 

A solar panel is a device made up of photovoltaic cells that converts sunlight directly into electricity, which can be used immediately to power appliances or stored in a battery for later use. 

6.  Are solar panels AC or DC? 

Solar panels generate direct current (DC) electricity. Since most household appliances run on alternating current (AC), an inverter is used to convert the DC output from the panels into usable AC electricity. 

7.  How much do solar panels cost in India? 

A fully installed residential system typically costs around ₹50,000 to ₹75,000 per kW before subsidy. Under the PM Surya Ghar Muft Bijli Yojana, eligible households can get a subsidy of up to ₹78,000 for a 3 kW or larger system, which brings the net cost down significantly.