By DesiMetrics Editorial Team · Updated 2 September 2026
For most homeowners with a suitable, unshaded roof, rooftop solar is worth it in India in 2026 — a typical 3kW system now pays back its net cost in roughly 3 to 6 years after the PM Surya Ghar subsidy, then keeps saving for most of its 25-year panel life. It pays off fastest for households with a high daytime electricity bill on a top tariff slab, and slowest for low-usage homes or states with weak net-metering rules.
What Does Rooftop Solar Actually Cost in 2026?
A typical residential 3kW system — enough for many small Indian households — commonly costs somewhere around ₹1.5–1.9 lakh before subsidy, depending on your installer, panel brand and state. Larger or premium systems cost proportionally more.
After the central subsidy, the same 3kW system typically nets out to roughly ₹75,000–1.1 lakh. These are commonly cited ranges, not fixed prices — always get quotes from MNRE-empanelled installers for your specific roof.
Takeaway: Expect a 3kW system to cost roughly ₹1.5–1.9 lakh before subsidy, and about ₹75,000–1.1 lakh after it — treat any quote outside this range with a closer look.
How Much Subsidy Can You Get Under PM Surya Ghar?
The PM Surya Ghar: Muft Bijli Yojana is the central government's rooftop solar subsidy scheme. It pays ₹30,000 per kW for the first 2kW, and ₹18,000 for the 3rd kW — so a 3kW system or larger gets the full ₹78,000 cap.
Some state governments add their own top-up subsidy on top of the central amount — check your state's renewable energy department for any additional scheme, since this varies and isn't modelled by the central subsidy alone. Use our PM Surya Ghar subsidy calculator to check your exact eligible amount.
Takeaway: The central subsidy alone can cover roughly 40–50% of a 3kW system's upfront cost — check for a state top-up on top of that.
How Long Does It Take to Recover the Cost (Payback Period)?
“Payback period” simply means how long it takes for your monthly electricity savings to add up to what you spent on the system. As of 2026, a payback of 3 to 6 years is commonly cited for a well-sized residential system after subsidy — but this is a range, not a guarantee, and depends heavily on your own numbers.
Reported payback periods vary widely across sources because they depend on your state's electricity tariff, how much power you actually use during daylight hours, and your DISCOM's net metering rules — the policy that credits you for solar power you export back to the grid instead of using yourself. A DISCOM (Distribution Company) is simply the utility that supplies and bills your electricity.
Takeaway: Treat “3–6 years” as a realistic planning range, and run your own numbers rather than trusting one number from an installer's brochure.
What Factors Make Solar Pay Off Faster or Slower?
- Your electricity tariff — Higher top-slab rates (many cities now see ₹8–10/unit) mean every solar unit saves you more.
- How telescopic your tariff is — Since Indian electricity is billed in telescopic slabs, solar offsets your most expensive units first — see how telescopic slabs actually work for the mechanics.
- Daytime usage pattern — Homes that use more power during daylight hours get more value from self-consumption than from lower-value grid export credit.
- Your state's net metering rules — A generous export credit rate speeds up payback; a weak one slows it down significantly.
- Roof orientation and shading — A shaded or non-south-facing roof generates less power for the same panel count, stretching out payback.
- Subsidy processing speed — Delays in subsidy disbursal or net-meter installation push out your effective payback clock.
Takeaway: Payback speed is mostly about your tariff and your daytime usage pattern — the same system pays back much faster in a high-tariff, high-daytime-usage home than a low-usage one.
Pros and Cons of Rooftop Solar in India
Pros
- • Lower electricity bills for the ~25-year life of the panels, once paid back
- • Central subsidy cuts upfront cost by up to ₹78,000
- • A hedge against rising electricity tariffs
- • Can increase resale value for some buyers
- • Minimal ongoing maintenance — mainly periodic panel cleaning
Cons
- • Real upfront cash outlay even after subsidy
- • Needs a genuinely unshaded, structurally sound roof
- • Payback varies a lot by state — not fast everywhere
- • Subsidy and net-metering paperwork can be slow
- • No power during outages unless you add a battery
- • Less worthwhile if you plan to move within a few years
Takeaway: The pros are strongest for long-term homeowners with a good roof and a real bill to reduce — the cons matter most for renters, short stayers, and shaded roofs.
Who Should NOT Install Rooftop Solar Right Now?
Solar is less likely to make sense right now if:
- Your roof is significantly shaded for large parts of the day, or structurally unsuitable.
- Your monthly electricity bill is already very small — there is little to save.
- You are renting, or plan to move within the next 2–3 years.
- Your state or DISCOM has poor or heavily delayed net-metering approval.
- You cannot comfortably afford the net upfront cost, even after subsidy.
Takeaway: Solar isn't universally right — it's a long-term homeowner's investment, not a quick fix for every household.
Real Example: Savings for a Typical 3kW Home System
Here's a fully worked, illustrative example for a 3kW system — treat every figure as an example, not a quote for your home:
| System size | 3 kW |
| System cost before subsidy (example) | ₹1,70,000 |
| PM Surya Ghar subsidy (3kW+, capped) | ₹78,000 |
| Net cost after subsidy | ₹92,000 |
| Estimated monthly generation | ~360 units (~4 units/kW/day) |
| Estimated monthly savings (example, blended rate) | ~₹2,160 |
| Estimated annual savings | ~₹25,920 |
| Approx. payback period | ~3.5 years (illustrative) |
Over the panels' ~25-year warranty life, lifetime savings in the ₹6–15 lakh range are commonly cited — the wide range reflects how much tariffs, usage and net-metering rules differ household to household. Run your own numbers with our solar ROI calculator, priced on your real DISCOM tariff.
Takeaway: A 3kW system commonly nets out to under ₹1 lakh after subsidy, with several years of ₹2,000+ monthly savings following once it pays back.
Related tools
PM Surya Ghar subsidy calculator
Check your exact eligibility and subsidy amount.
Solar ROI calculator
See your real payback and 25-year savings, priced on your DISCOM.
Panel size calculator
What system size and roof area you actually need.
How telescopic electricity slabs work
Why solar offsets your most expensive units first.
Frequently asked questions
Does rooftop solar work during a power cut?
No — a standard grid-tied solar system automatically shuts off during a power cut, for the safety of linesmen working on the grid. To keep power flowing during an outage, you need a hybrid inverter with a battery, which adds meaningful extra cost.
Do I need a battery for rooftop solar?
Not for a standard grid-tied system using net metering — your excess daytime power is exported to the grid instead of stored. A battery is only needed if you specifically want backup power during outages.
How much roof space does a 3kW solar system need?
Roughly 300 sq ft is commonly cited, based on about 100 sq ft per kW of panels, though this varies by panel efficiency and layout. Use a panel size calculator with your own roof dimensions for an accurate figure.
Is the PM Surya Ghar subsidy the same in every state?
The central subsidy — ₹30,000/kW for the first 2kW and ₹18,000 for the 3rd kW, capped at ₹78,000 — is the same nationwide. Some states offer additional top-up subsidies on top of this, so check your state government’s current scheme too.
What happens to solar savings if electricity tariffs go up?
Your savings actually improve, since every unit your panels generate offsets a unit you would otherwise have bought at the new, higher rate. This is a big reason solar economics have gotten better as urban tariffs have risen.
Can I install rooftop solar on a rented house?
It is technically possible with the landlord’s consent, but subsidy applications and net-metering paperwork are usually filed against the property owner’s name. In practice, rooftop solar is best suited to homes you own or plan to stay in long-term.
Sources: PM Surya Ghar central subsidy figures per the National Portal for Rooftop Solar (MNRE). Costs, tariffs and payback periods vary by state, installer and household usage, and change periodically — always confirm current figures on the official portal and with your state DISCOM before deciding.