Things to Know Before Installing Solar Panels on Your Roof

Published: 01 Aug, 2025 | By Solar

The world is tired of power cuts and those who are not, are worried about rising electricity bills? And that’s the reason why a lot of people across smaller towns and cities in India are starting to look and figuring out how to install solar panels.

And why shouldn’t they? solar panels for home with the free sunlight you get all year long, it is smart enough to save some or maybe even make some money out of it. But before you jump in, there are a few things you should know.

At Spectra Solar Power, we’ve worked with so many people across the world to start their solar journey and this simple guide will walk you through the basics, so you can also make the right choice for your home and family.

And since Solar Panels Installation Guides could help, here’s one for you.

1. First, Know How Much Electricity You Use

Before you start installing anything, it’s good to know what actually are your monthly requirements.

And for that you don’t need any fancy tools, just check your electricity bill and look for something called “units” or “kWh.” That’s how much electricity you’re using.

• On an average, a small family uses around 200-300 units per month
• While a bigger home with ACs, washing machines, etc., could use 600–800 units or more.

And once you know this, it becomes easier to decide what kind of solar system and how many solar panels your home needs.

2. But Is Your Roof Ready For Solar Panels?

How to install solar panels on roofs? This question comes up with another one. Ever thought about if you really have enough space or if you do, is your roof sturdy enough to handle the little weight of panels, though this is still not it.

Here are some more specifics you should search for.

• Sunlight: Does your roof get good sunlight for most of the day? Also there’s a fact that South-facing roofs are the best in India.
• Shadows: Avoid places where trees, water tanks, or nearby buildings that create shadows and block the sun.
• Strong roof: Solar panels aren’t too heavy, but still need your roof to be in decent shape to hold them safely.

But don’t you worry about that, Spectra Solar Power offers the facility of home survey to check your roof and guide you properly.

3. Choosing The Right Type of Solar System

There are multiple options to choose from while getting the right system for your house, but which one you choose depends on the conditions of your roof and the requirements of power.

a. On-Grid System

• It is connected to the regular electricity grid.
• You use solar power during the day and normal grid power at night.
• And if you produce more than you are using, you get credits from the electricity board (this is called net metering).
• Great to choose if you live in a city or town with regular electricity.

Spectra Solar Power specialises in reliable on-grid solar systems for homes across India.

b. Off-Grid System

• This one is not connected to the grid.
• But it comes with batteries to store power for later.
• Mostly useful in areas where power cuts are frequent or there’s no electricity at all.

c. Hybrid System

• And this one is literally a mix of both on-grid and off-grid.
• More flexible but costs a bit more.

And If you’re still not sure what’s right for your home, we are saying it again, the Spectra team can explain the pros and cons clearly during a home visit.

4. You Might Get A Government Subsidy

Yes, you read that just right! The government offers financial support to people installing solar panels on their roofs.

Such as schemes like the PM Surya Ghar Yojana, you can get a subsidy of up to ₹78,000 (depending on the system size).

Spectra Solar Power also assists you to take care of the full subsidy process, from paperwork to approvals, so that you don’t need to worry about running around.

5. Choosing The Right Panels And The Right People

Solar panels come in different types and brands and if you don’t know much about that, here’s what you should look for:

• Good efficiency (should be able to generate more power using less space)
• Long warranty (ideally 25 years)
• Durability (should at least be able to handle rain, dust, and high temperatures)

And just as important is choosing the right installation partner who knows how to install solar panels at home in India, because only a good company will:

• Understand your needs
• Offer genuine advice
• Use quality parts
• Help with subsidy and approvals
• Be there even after installation for servicing

That’s where Spectra Solar Power as the best solar panel company in India stands out. We’re a trusted solar company in India, known for clean work, fair pricing, and long-term support.

6. How Much Roof Space Do You Need?

A common question people ask is, “Mere chhat pe jagah kaafi hai kya?” (Is my roof big enough?) So here’s a simple guide for them:

• 1 kW system = ~100 sq. ft. of space
• 3 kW system = ~300 sq. ft.
• 5 kW system = ~500 sq. ft.

If your roof is open and gets sunlight, there’s a good chance you can fit panels. And if you’re still not sure, Spectra’s engineers will visit your home, take measurements, and give you honest feedback.

7. How Does Installation Work?

The full process is easier than most people think, once you decide to go ahead, here’s what happens:

• Site visit to check your roof and needs
• Designing the system (how many panels, inverter size, etc.)
• Paperwork and approvals (Spectra handles it all)
• Installation (usually takes 2–5 days, but we do it in just 8 hours)
• Net metering setup, so you can start saving

8. Do Solar Panels Need Maintenance?

Not much at all, solar panels are low-maintenance, but you definitely do need to keep them clean.

• You just need to wipe off the dust with a soft cloth or wash with water once or twice a month.
• But please avoid using harsh tools or walking on the panels.
• And just once a year, get a full system checkup.

9. What Will It Cost? (Approx.)

The cost depends on your power needs and the type of system, but here’s a rough idea, for you:

After subsidy, it becomes much more affordable. Plus, your electricity bill will drop by up to 80–90%, so the system pays for itself in a few years.

Why Choose Spectra Solar Power?

There are many solar companies, but here’s why Spectra Solar Power is trusted across homes in India:

• Because we have got easy-to-understand solar solutions.
• Quality panels and inverters from top brands
• Complete help with subsidy and government approvals
• Clean, on-time installation
• Long-term service and maintenance

We believe that whoever owns a home should be able to consider solar panels for the place, because there are more benefits to going solar than just lowering your electricity costs. It's about taking charge of your electricity, fewer concerns about outages, and making a positive impact for the future. Solar is something that can genuinely transform your home's operation with the correct direction and a reliable team.

Give us a call or stop by our website if you're prepared to move forward or simply want to learn more about your options.

For many years to come, let Spectra Solar Power assist you in converting your roof into a dependable, clean energy source.