What are the main components of a grid-connected rooftop solar PV system? 

A grid-connected rooftop solar PV system is made up of several key components that work together to generate, convert, and manage electricity efficiently. 

At the heart of the system are the solar panels, also known as photovoltaic (PV) modules. These panels capture sunlight and convert it into direct current (DC) electricity. They are typically installed on rooftop structures at an optimal angle to maximize energy generation throughout the day. 

The electricity generated by the panels then flows to an inverter, which is one of the most critical components of the system. Since most homes and businesses operate on alternating current (AC), the inverter converts the DC power produced by the panels into usable AC electricity. Modern inverters also include monitoring features and safety mechanisms to ensure smooth operation. 

Another essential component is the mounting structure, which securely holds solar panels in place on the rooftop. It is designed to withstand environmental conditions such as wind, rain, and temperature variations while maintaining the correct tilt and orientation of the panels. 

The system also includes electrical components such as DC and AC cables, junction boxes, and protection devices. These elements ensure safe transmission of electricity between different parts of the system and protect it from faults like short circuits or voltage fluctuations.  

A bidirectional or net meter is installed to measure the flow of electricity between the solar system and the grid. It records both the energy consumed from the grid and the excess energy exported back to it, enabling net metering benefits. 

In addition, a grid connection is an integral part of the system, allowing seamless interaction between the solar installation and the utility supply. This ensures that electricity is available even when solar generation is low or unavailable. 

Finally, many systems include a monitoring system that allows users to track energy generation, consumption, and system performance in real time. This helps in identifying issues early and maintaining optimal efficiency. 

Together, these components form a complete and efficient grid-connected rooftop solar PV system, enabling users to generate clean energy while staying connected to the conventional power supply. 

How much area is required for a 1 KWP rooftop Solar PV system?  

A rooftop solar PV system typically requires around 8 to 10 square meters of shadow-free roof area. 

Why do I need a shadow-free area for modules? 

Every solar panel is made up of dozens of small solar cells connected in a series chain, like links in a rope. When sunlight falls on them, each cell generates a small voltage. Together, they add up to produce usable electricity. 

A shaded cell works like that blocked lane. It stops producing electricity but still sits in the series chain. The current that the rest of the sunny cells are trying to push has nowhere to go, so the entire string of cells is forced to drop down to the level of that one weak, shaded cell. 

The result? A shadow covering just 5% of a panel can reduce its output by 30–50%. 

A solar panel is only as strong as its weakest cell — and a shadow, even a small one from a TV antenna, a water tank, a bird, or a neighboring building, instantly becomes that weakness. 

This is why a shadow-free area is not a preference — it is a non-negotiable foundation of any well-designed solar system. 

What types of roofs are suitable for a rooftop solar (RTS) system?  

The roof must support the weight, survive decades of weather, and allow clean, efficient mounting without leaks or structural damage. 

Most urban homes, commercial buildings, factories, and institutions in India have RCC roofs, making them the most common and easiest canvas for solar. 

Whereas most large-scale commercial and industrial rooftop solar projects in India sit on metal shed roofs. 

A roof that can last 25 years should be a fit for a solar system installed on it, because removing and reinstalling panels to repair a failing roof costs more than the solar system itself. 

Always assess roof age, waterproofing condition, and structural load capacity before the first panel is placed. A good solar installer evaluates your roof before they ever talk about panels. 

Will I get constant/same energy from the RTS all year round?  

Our solar system is designed and sized using the annual average generation figure — not the best day or the worst day. Some days you will generate more. On some monsoon days, you will generate a little less than the sunnier days. But across the full year, a well-sited and well-maintained system delivers remarkably close to its designed annual output. Your solar system does not promise you the same energy every day — it promises you the right energy across the year, if you give it a clean roof and a clear sky.  

What are the factors affecting power generation?  

1. Solar Irradiance — The Master Variable
2. Panel Orientation — Which Way Your Roof Faces
3. Tilt Angle — The Angle at Which Panels Are Mounted
4. Shading — The Most Destructive Factor Per Unit Area
5. Dust, Soiling and Panel Cleanliness

What are the advantages of a Grid-Connected Rooftop Solar System?  

A grid-connected rooftop solar system gives you free fuel for 25 years, turns your surplus power into grid credits, protects you from rising tariffs, requires almost no maintenance, increases your property value, earns government support, and simultaneously makes your small but measurable contribution to a cleaner planet — all from a silent, weatherproof installation on a roof that was doing nothing useful before. 

There is very little in the world of energy investment that offers this combination of financial return, energy security, and environmental value in a single decision, a Grid-Connected Rooftop Solar System is exactly that.

1.Zero Fuel Cost — Sunlight Bills You Nothing

Every unit of electricity your solar system generates costs you nothing in fuel. Once your system is installed and paid for, the marginal cost of every unit it produces for the next 25 years is essentially zero. Solar flips the economics permanently. The fuel is free, inexhaustible, and arrives every morning without fail. 

2.Huge Reduction in Electricity Bills

This is the advantage every household feels most immediately and most tangibly. A well-sized rooftop solar system in India can offset 80–100% of a home’s daytime electricity consumption. The system pays for itself typically within 4 to 6 years in India, after which every unit it generates is pure financial gain for the remaining 19–21 years of its life. 

3.Net Metering — Your Roof Becomes a Power Exporter

This is the unique superpower of a grid-connected system that an off-grid system can never offer. When your solar panels generate more electricity than your home is consuming at that moment, say, on a sunny afternoon when you are at work and appliances are idle, that surplus power does not go to waste. It flows back into the grid through your meter, and the electricity distribution company credits you for every unit exported. At the end of the month, you pay only for the net difference between what you consumed from the grid and what you exported to it. In many cases, heavy solar users receive bills close to zero or even carry forward credits to the next month. Your roof, in effect, becomes a small, silent power plant selling electricity back to the grid. 

4. No Battery Required — The Grid becomes your Storage

Off-grid solar systems need expensive battery banks to store daytime solar power for use at night. Batteries add high cost, require maintenance, and need replacement every 5–10 years. 

A grid-connected system eliminates this entirely. The grid itself acts as your virtual battery — absorbing your surplus during the day and supplying you at night. You get the benefit of round-the-clock power without the cost and complexity of physical storage. 

This is why grid-connected systems are significantly more affordable and simpler to maintain than off-grid alternatives. 

5. Long System Life With Minimal Maintenance 

A grid-connected rooftop solar system has almost no moving parts. The panels are static. The inverter has minimal mechanical components. There is nothing to lubricate, no fuel to refill, no filters to replace monthly. 

Routine maintenance is remarkably simple: 

Panel cleaning every 15–30 days 

Annual inverter performance check 

Periodic inspection of the mounting structure and cable connections

With this basic care, quality solar panels carry 25-year performance warranties and inverters last 10–15 years. The system silently generates returns decade after decade with minimal human intervention. 

6. Increase in Property Value

A rooftop solar system is a permanent infrastructure upgrade to your property. In markets where electricity costs are high and power reliability is variable, a solar-equipped building commands measurably higher value and appeal. 

For commercial properties, a solar system also signals operational cost efficiency — an increasingly important factor for tenants, buyers, and investors evaluating long-term running costs. 

7. Contribution to Grid Stability and National Energy Goals

Millions of rooftop solar systems feeding into the grid during peak daytime hours collectively reduce the burden on the central grid precisely when demand is highest — during business hours and summer afternoons. 

This distributed generation model reduces transmission losses, defers the need for new power plant capacity, and makes the overall grid more resilient. Every rooftop system is a small but real contribution to India’s national target of 500 GW of renewable energy capacity by 2030. 

Your roof is not just helping your electricity bill — it is part of a national energy transformation. 

8. Government Incentives and Subsidies

The Government of India and most state governments actively support rooftop solar adoption through these incentives. These incentives significantly reduce the upfront capital requirement and accelerate the payback period, making the financial case for rooftop solar stronger than ever. 

         9. Environmental Legacy — Beyond the Financial

A 1 kWp rooftop system generating 1,500 units annually prevents approximately 1.2 tones of CO₂ from entering the atmosphere every year. Over 25 years, that single small system has prevented over 30 tons of carbon emissions — the equivalent of planting several hundred trees. For larger commercial systems of 10, 50, or 100 kWp, this environmental arithmetic becomes genuinely significant. 

Metering for Solar rooftop 

What is Net Metering? 

Net metering is a billing mechanism that allows consumers who generate their own electricity, typically through rooftop solar panels, to send excess power back to the grid and receive credit for it. When your solar system produces more electricity than your home or business is using, the surplus energy is exported to the utility grid, and your electricity meter records this as a credit. Later, when your system is not generating enough power (such as at night or during cloudy weather), you can draw electricity from the grid and use those accumulated credits to offset your consumption. 

In simple terms, net metering helps balance the electricity you consume and the electricity you produce, ensuring that you only pay for the “net” amount of energy used. This system not only reduces electricity bills but also encourages the adoption of renewable energy by making solar installations financially more attractive. It essentially turns the grid into a storage system, allowing users to maximise the benefits of their solar investment without needing expensive battery storage. 

What is Gross Metering? 

Gross metering is a system in which all the electricity generated by a solar power system is exported directly to the utility grid, rather than being used for on-site consumption. In this arrangement, solar energy produced is measured separately and sold to the electricity distribution company at a predetermined tariff. At the same time, the consumer continues to draw power from the grid for their own usage and is billed normally based on total consumption. 

Unlike net metering, where self-consumption reduces your electricity bill, gross metering treats solar generation and electricity usage as two independent transactions. This means you earn revenue for the total power your system generates; while still paying for all the electricity you consume from the grid. Gross metering is often preferred in large-scale or commercial projects where maximising income from power generation is the primary goal, rather than offsetting on-site energy use. 

What is Net Billing? 

Net billing is a solar energy compensation mechanism in which the electricity generated by a rooftop solar system is first used for self-consumption, and any excess power is exported to the grid for monetary compensation at a predefined rate. Unlike net metering, where exported units are credited against imported units, net billing involves a financial transaction—meaning the surplus energy you send to the grid is purchased by the utility at a specific tariff, which is usually lower than the retail electricity rate. 

In this system, consumers continue to pay the standard tariff for the electricity they import from the grid. At the same time, the exported solar power is calculated separately and credited as a monetary value on their electricity bill. Net billing strikes a balance between self-consumption and revenue generation, encouraging users to utilise as much solar energy as possible on-site while still benefiting financially from any excess production. 

CAPEX Model: Here, the consumer owns the system himself and he bears the cost of the system. RESCO Model: Here, the entire system is owned by the 3 rd party project developer. The consumer only purchases the generated energy by paying pre-decided tariff on a monthly basis as per Power Purchase Agreement (PPA). Responsibility of O&M for the system lifetime (25 years) is also with the developer.

What is the payback for solar rooftop using various business models?

A simple payback period can be calculated by using rooftop calculator available at following web link: https://solarrooftop.gov.in/rooftop_calculator

Installation of Solar Rooftop Systems 

How can I apply for the installation of a solar rooftop system? 

Applying for the installation of a rooftop solar system involves a few structured steps that ensure your system is safe, efficient, and eligible for government benefits. The process usually begins with assessing your electricity consumption, requirements, and rooftop suitability. You can approach a registered solar vendor or installer who will evaluate factors such as available roof space, orientation, shading, and load requirements to suggest an appropriate system size. 

Once the initial assessment is complete, you need to apply to your local electricity distribution company (DISCOM) or through the national rooftop solar portal launched by the Ministry of New and Renewable Energy. This application typically includes details of your property, electricity connection, and proposed solar capacity. After submission, the DISCOM reviews the request and provides technical feasibility approval, which confirms whether your system can be safely connected to the grid. 

After receiving approval, the installation work is carried out by the selected vendor, including mounting the panels, inverter setup, and wiring. Once the system is installed, it is inspected by the DISCOM to ensure it meets safety and technical standards. Following inspection, a bi-directional (net) meter is installed to track both electricity import and export. Finally, the system is commissioned, and you can start generating solar power while benefiting schemes like net metering or net billing, depending on your region’s policy. 

What is the general procedure for the installation of a Rooftop Solar system for the beneficiary? 

The general procedure for the installation of a rooftop solar system for a beneficiary begins with understanding energy needs and evaluating the suitability of the rooftop. The beneficiary typically contacts an authorized solar vendor or installer, who conducts a site survey to assess factors such as roof size, orientation, structural strength, and shading. Based on this evaluation, the vendor recommends an appropriate system of capacity and provides a proposal that includes technical details, cost estimates, and expected energy generation. 

After finalizing the vendor, the beneficiary applies for approval through the local DISCOM, or the national portal managed by the Ministry of New and Renewable Energy. The application includes necessary documents such as identity proof, electricity bill, and technical specifications of the proposed system. The DISCOM then conducts a feasibility check and grants approval, allowing the installation to proceed. 

Once approval is received, the installation process begins, which includes mounting the solar panels, installing the inverter, and completing the electrical connections. After installation, the system is inspected by the DISCOM to ensure compliance with safety and grid standards. A bi-directional meter is then installed to record both electricity consumption and export. After successful inspection and meter installation, the system is commissioned, and the beneficiary can start generating solar power and availing benefits such as reduced electricity bills and applicable incentives or subsidies. 

Can I install a rooftop solar system if I live in a rented house? 

Yes, it is possible to install a rooftop solar system while living in a rented house, but it depends largely on the property owner’s consent and the practical feasibility of the installation. Since the rooftop belongs to the landlord, you must obtain their permission before proceeding. In many cases, landlords may agree if the installation adds value to the property, reduces electricity costs, or is done without causing structural changes. It is also important to clearly define ownership of the system, maintenance responsibilities, and what happens to the system if you move out. 

From a technical and regulatory perspective, the electricity connection and rooftop access must align with the solar installation requirements. If the electricity meter is in your name and the local DISCOM permits it, you may be eligible for net metering. However, some policies or subsidy programs may require property ownership, which could limit certain benefits for tenants. Overall, while installing rooftop solar in a rented house is feasible, it requires mutual agreement, proper documentation, and careful planning to ensure a smooth experience. 

What kind of system can be installed in the Group Housing Society (GHS)? 

In a Group Housing Society (GHS), multiple types of rooftop solar systems can be installed depending on the energy requirements and ownership structure within the society. The most common option is a common facility solar system, where the solar installation is set up to supply electricity for shared services such as lifts, lighting in common areas, water pumps, and security systems. In this case, the system is typically connected to the society’s common meter, helping reduce overall maintenance costs for residents. 

Another option is individual rooftop systems for each apartment, provided there is sufficient roof space and a clear allocation mechanism. In such cases, the generated power is linked directly to the respective resident’s electricity meter, allowing them to benefit from schemes like net metering or net billing. However, this approach may require proper planning and agreement among residents to divide the available rooftop area fairly. 

Additionally, a net metering or shared solar model can be implemented in some regions, where a single larger solar system is installed, and the generated energy is proportionally distributed among multiple households based on their agreed share. This model is particularly useful when individual installations are not practical. Overall, the choice of systems in a Group Housing Society depends on factors such as rooftop space, electricity consumption patterns, regulatory policies, and collective decision-making among residents.  

Operation and maintenance of Solar Plant 

What is the minimum warranty period you offer? 

Under most of the government-supported rooftop solar schemes in India, the minimum warranty requirements are defined to ensure long-term performance and reliability of the system. Typically, solar panels come with a performance warranty of 25 years, which guarantees that the panels will continue to generate electricity at a specified efficiency level over time.  

For other key components such as batteries, the standard warranty period is generally around 5 years, although this can vary depending on the manufacturer and may be extended at an additional cost. Installation of work and workmanship provided by the vendor are also expected to be covered for a certain period to ensure quality and safety. These warranty guidelines are often aligned with standards set by the Ministry of New and Renewable Energy, ensuring that beneficiaries receive durable and efficient solar systems under the scheme. 

What is the O&M aspects of a grid-connected rooftop solar system? 

The operation and maintenance (O&M) aspects of a grid-connected rooftop solar system focus on ensuring consistent performance, safety, and long-term reliability of the installation. We offer AMCs, which are Annual Maintenance Contracts for the same. One of the most important activities is regular cleaning of solar panels to remove dust, dirt, bird droppings, and other debris that can reduce energy generation. In areas with high dust levels, cleaning may be required more frequently to maintain optimal efficiency. Along with cleaning, periodic visual inspections are carried out to check for any physical damage, loose connections, or shading issues that could impact performance. 

Another key aspect involves monitoring the system’s energy generation and overall performance through the inverter or a remote monitoring system. This helps in identifying any drop in output, inverter faults, or grid connectivity issues at an early stage. Electrical components such as wiring, earthing, and protection systems should also be inspected regularly to ensure safety and compliance with standards. Preventive maintenance, including tightening of connections and checking mounting structures for corrosion or wear, further enhances system durability. 

Our AMC’s features: 

⦁ Quick Solar service: Fast, reliable, and sustainable network 

⦁ Entrusting your solar system to an AMC helps maintain optimal performance, prolong  its lifespan, reduce overall costs, and gives you complete peace of mind. 

⦁ Take charge of your solar assets with our centralized monitoring system. 

⦁ Enhance efficiency, minimize downtime, and maximize energy generation with greater effectiveness. 

⦁ Access performance analytics, real-time data, and predictive insights—all through a single, unified dashboard 

General Information about solar power in the country

1. What is the gross potential of solar power in the country?

The gross potential of solar power in India is vast due to its favourable geographic location and high solar irradiation levels across most regions. The country receives abundant sunlight for most of the year, making it highly suitable for large-scale solar energy generation.  This significant potential highlight India’s capability to transition toward clean and renewable energy on a large scale. With the increasing adoption of solar technologies, supportive government policies, and advancements in infrastructure, the country is steadily working to harness this vast resource. Tapping into this potential not only helps reduce dependence on conventional energy sources but also contributes to environmental sustainability and long-term energy security.

2.What is your manufacturing capacity?

Our manufacturing capacity stands at 1 GW, which reflects our ability to produce solar structures and components at a large scale to meet growing market demand. This high production capability enables us to cater to multiple projects simultaneously, ranging from small rooftop installations to large utility-scale solar parks. With advanced manufacturing facilities, streamlined processes, and a focus on quality control, we ensure consistent output without compromising durability or performance. Our 1 GW capacity not only highlights our operational strength but also positions us as a reliable partner for delivering timely and efficient solar infrastructure solutions.

3. Are there any government subsidies available?

Yes, subsidies and incentives are often provided for residential rooftop solar installations under government schemes, subject to eligibility criteria.

4.What are the main components of a rooftop solar system?

The key components include solar panels, an inverter, mounting structures, wiring, and a net meter (in grid-connected systems). Some systems may also include batteries for energy storage. 

5. How long does it take to install a rooftop solar system?

The installation process usually takes a few days to a couple of weeks, depending on system size, approvals, and site conditions.

6. Which are the States in India that have Net-metering regulations?

Net metering regulations in India are defined at the state level, and today, most Indian states and union territories have implemented net metering policies for rooftop solar systems, although the rules and limits may vary from one state to another. 

Some of the major states where net metering regulations are in place include Delhi, Maharashtra, Karnataka, Tamil Nadu, Gujarat, Rajasthan, Haryana, Punjab, Uttar Pradesh, Kerala, Telangana, Andhra Pradesh, Madhya Pradesh, Odisha, Uttarakhand, and Chhattisgarh. In addition to these, several other states and union territories, such as Himachal Pradesh, Goa, Arunachal Pradesh, and Jammu & Kashmir (including Ladakh), also support net metering (often along with other mechanisms like gross metering, net billing, and virtual net metering). 

Overall, net metering is widely adopted across India as a key policy to promote rooftop solar adoption. However, each state’s electricity regulatory commission sets its own guidelines regarding system size limits, billing mechanisms, and eligibility criteria, so the exact provisions may differ depending on the location.