10 Common Mistakes to Avoid When Installing Rooftop Solar Panels in India
Installing rooftop solar panels is one of the best ways to save money and use clean energy. But many people make mistakes while planning or installing their solar system. These mistakes can reduce efficiency, increase costs, or even cause system failure.
In this blog, we’ll explain the common mistakes to avoid so that your rooftop solar system works smoothly for 25+ years.
1. Not Checking Roof Condition Before Installation
Your roof must be strong enough to hold the weight of solar panels for decades. If the roof is weak, cracked, or due for renovation, install solar after repair. Otherwise, you’ll face problems later and may even need to uninstall the system.
2. Ignoring Shadow-Free Area
Solar panels need direct sunlight to work efficiently. If trees, water tanks, or nearby buildings cast shadows, your energy generation will drop. Always choose a shadow-free part of the roof and ask your installer to do a sunlight analysis before installation.
3. Choosing the Wrong System Size
Some people install a system that is too small (not enough to cover their needs), while others buy a very large system that is not cost-effective.
👉 Check your monthly electricity usage and calculate the right solar capacity. Usually, 1 kW = 4–5 units/day in India.
4. Going for the Cheapest Panels and Inverters
Low-cost solar panels may look attractive but often have shorter life, low efficiency, and poor warranty support. Invest in quality panels and inverters from trusted brands. Remember: solar is a long-term investment, not a one-time expense.
5. Not Checking Net Metering Policy
Net metering lets you send extra electricity to the grid and adjust it in your bill. But policies differ from state to state. Before installing, confirm your state’s net metering rules so you know exactly how much you can save.
6. Ignoring Government Subsidy Options
Many people forget to apply for the government rooftop solar subsidy (like the PM Surya Ghar Muft Bijli Yojana 2025). This subsidy can reduce your cost by 20–40%. Always apply through the National Portal for Rooftop Solar before installation.
7. Poor Quality Installation
Even the best panels won’t perform if the installation is poor. Common issues include:
- Loose wiring
- Wrong panel angle
- Poor mounting structure
👉 Always choose an MNRE-approved vendor with experience and good after-sales service.
8. No Plan for Maintenance
Solar panels require minimal maintenance, but you must clean them 2–3 times a month to remove dust and dirt. Many people forget this, which reduces efficiency. Some vendors also offer AMC (Annual Maintenance Contracts) for hassle-free upkeep.
9. Not Planning for Future Energy Needs
If you’re planning to buy an EV (electric vehicle), more ACs, or kitchen appliances in the future, your electricity demand will rise. If your budget allows, install a slightly higher capacity system so you don’t need a full upgrade later.
10. Forgetting Warranty and Service Support
Before buying, check:
- Panel warranty (usually 25 years)
- Inverter warranty (5–10 years)
- Service availability in your area
Skipping this step can cost you more in the long run.
Conclusion
Installing rooftop solar is a smart investment, but only if done correctly. Avoiding these mistakes will help you:
✅ Save more money
✅ Increase system efficiency
✅ Reduce maintenance costs
✅ Enjoy free electricity for decades
So, plan wisely, choose the right vendor, and enjoy the full benefits of solar energy.
1. What are the most common mistakes people make when installing rooftop solar panels?
Some common mistakes include choosing the wrong system size, ignoring roof condition, not checking shadows, using low-quality panels, and skipping government subsidies.
2. How do I know what size rooftop solar system I need?
Check your monthly electricity usage. In India, 1 kW solar generates around 4–5 units per day. Divide your daily electricity use by this number to estimate your required capacity.
3. Do I need to clean solar panels regularly?
Yes. Dust, dirt, and bird droppings reduce efficiency. Cleaning panels 2–3 times a month helps maintain performance.
4. Is it okay to buy the cheapest solar panels available?
No. Cheap panels may have low efficiency and shorter lifespan. It’s better to invest in quality panels and inverters with a strong warranty.
5. Can I get government subsidy for rooftop solar in 2025?
Yes. Under the PM Surya Ghar Muft Bijli Yojana 2025, you can get up to ₹78,000 subsidy for residential rooftop systems up to 3 kW.
6. What should I check before hiring a solar installer?
Always choose an MNRE-approved vendor, check their past projects, warranty terms, and after-sales service availability.