Cost of Rooftop Solar in India: A Realistic Breakdown (2026)

If you’ve been researching rooftop solar, you’ve probably seen everything from “₹40,000 per kW” ads to premium quotes that feel double of that. The truth sits in the middle, and it depends on what’s included (and what’s quietly excluded).

Rooftop solar pricing made simple: what you really pay in India (2026)

This post gives you a real-world, line-by-line cost breakdown for Indian homes, plus what PM Surya Ghar subsidy actually changes, what GST changes did to pricing, and the hidden costs most quotes don’t mention.

1) First, decide what “type” of rooftop solar you’re pricing

On-grid (most common for city homes)

• Works with net metering / net billing.
• No battery.
• Best ROI if power cuts aren’t frequent.

Hybrid (grid + battery backup)

• Runs like on-grid in daytime, gives backup during outages.
• Costs more because of hybrid inverter + battery.

Off-grid (battery-only, no grid export)

• Useful where grid is unreliable and net metering isn’t possible.
• Usually the costliest per usable unit because batteries do the heavy lifting.

Most “subsidy-friendly” residential installs are on-grid under PM Surya Ghar.

2) Typical rooftop solar prices in India (2025–26): what people actually pay

There’s no single “correct” price, but residential quotes commonly land in this zone:

• Budget installs: ~₹40,000–₹60,000 per kW
• Mid-range (better inverter, structure, safety, workmanship): ~₹55,000–₹75,000 per kW
• Premium (top-tier components + elevated structure + clean BOS): can go higher

These ranges align with multiple India market price guides from installers/brands.

Quick reality table (all-in, before subsidy)

System size	Typical price range (₹)	Who it fits
1 kW	65,000 – 85,000	Very low usage / small homes
2 kW	1,20,000 – 2,05,000	150–250 units/month homes
3 kW	1,70,000 – 2,35,000	250–450 units/month homes
5 kW	2,95,000 – 3,70,000	450–750 units/month homes
10 kW	5,70,000 – 6,40,000	Large homes / villas / high usage

Sources for these commonly-quoted brackets (varies by city, roof, brand, scope).

3) The “real” cost breakup: where your money goes

For a typical on-grid residential system, your total is usually split like this:

A) Solar panels (modules): ~45–55%

• Mono PERC / TOPCon / bifacial, warranty terms, and brand matter.
• Bigger wattage panels can reduce structure + wiring complexity slightly.

B) Inverter: ~10–18%

• String inverter brand + warranty is a major price swing.

C) Mounting structure: ~8–15%

·        This is where roof type changes everything:

• RCC roof: simpler
• Metal shed / asbestos / high parapet: needs custom work
• Elevated structure: costs more but helps shade + waterproofing concerns

D) Electrical BOS (Balance of System): ~10–15%

Includes:

• DC cables, AC cables
• MC4 connectors
• DCDB/ACDB (protection boxes)
• Surge protection devices (SPD)
• Earthing kit / lightning protection (should be included, but not always)

E) Installation, commissioning & documentation: ~8–12%

• Labour, civil finishing, testing, handover file, basic training.

F) Net meter / approvals / inspection: ~2–6%

• Varies sharply by state DISCOM process (and whether the quote is truly “all inclusive”).

4) Example: 3 kW on-grid system - a realistic line-by-line bill

Let’s use a typical mid-range 3 kW quote: ₹2.10 lakh (before subsidy).

Component	Expected share	Approx amount
Solar panels	50%	₹1,05,000
Inverter	14%	₹29,000
Structure	10%	₹21,000
BOS (cables, DBs, SPD, earthing)	14%	₹29,000
Installation & commissioning	10%	₹21,000
Net meter/approvals buffer	2%	₹4,000
Total	100%	₹2,10,000

If someone quotes ₹1.60 lakh for the same size, it can be genuine-but it’s often because something is lighter:

• cheaper inverter/warranty,
• thinner structure,
• missing SPD/earthing quality,
• net-metering cost not included,
• “standard” cable lengths only.

5) PM Surya Ghar subsidy: what you actually get (and what you don’t)

The practical subsidy amounts most homeowners see

Under PM SuryaGhar: Muft Bijli Yojana, the commonly stated subsidy is:

• ₹30,000 per kW up to 2 kW
• ₹18,000 for the 3rd kW
• Maximum: ₹78,000 (for 3 kW and above)

The official structure behind those numbers

The scheme guideline also describes it as:

• 60% of benchmark cost up to 2 kW
• 40% for 1 kW additional (i.e., up to 3 kW)
• No subsidy beyond 3 kW

What this means in real money

• 3 kW system: subsidy can be up to ₹78,000
• 5 kW system: subsidy is still capped (typically ₹78,000 max), so you pay most of the extra capacity yourself.

Also note:

• Subsidy is for grid-connected rooftop solar (battery add-ons generally don’t get covered in typical residential on-grid subsidy claims).
• Subsidy credit usually comes after installation + DISCOM inspection/commissioning (not as an upfront discount unless a specific portal/vendor workflow does that).

Scheme timeline and implementation details are in MNRE’s guideline document.

6) GST update (important for quote comparisons)

A major recent change: GST on renewable energy devices/parts was reduced from 12% to 5%, effective 22 September 2025.

What to do with this information:

·        If you’re comparing quotes across months, ask for:

• itemized GST,
• whether the quote is “inclusive of all taxes”,
• and the invoice category used.

(Reality check: some vendors may still price based on old procurement, bundled services, or simply market positioning-so don’t assume your quote will drop exactly by 7%.)

7) Hidden costs that surprise homeowners (ask these before you sign)

Here’s a checklist I recommend asking every installer:

Quote checklist (copy/paste)

• Is it all-inclusive: panels + inverter + structure + BOS + installation?
• Are DCDB + ACDB + SPD included?
• How many earth pits and what type (chemical/standard)?
• Is lightning arrestor included (where needed)?
• Are net metering charges / testing fees / application fees included?
• Is monitoring (Wi-Fi/data logger/app) included?
• Warranty in writing:

• panels (performance),
• inverter replacement,
• workmanship leakage/support,
• structure rusting/corrosion terms.

•     Timeline for DISCOM process + who follows up.

8) Battery backup cost (Hybrid): what it adds to your budget

If you want backup during power cuts, your cost shifts because you add:

1. Hybrid inverter
2. Battery bank

Typical add-on pricing (very rough but usable)

• 5 kW hybrid inverter: often quoted roughly ₹75,000 to ₹1.6 lakh, depending on brand/features.
• 5 kWh lithium (LiFePO₄) battery: often around ₹99,000–₹1,15,000 in retail pricing.

Rule of thumb: a “solar + serious backup” hybrid setup can add ₹1.5 lakh to ₹3 lakh+ depending on how many hours of backup you want, and what loads you want to run (AC/geyser/pump changes everything).

9) Payback reality (simple and honest)

A commonly used benchmark: 1 kWp can generate ~4 to 5.5 units/day on a clear sunny day (varies by location, season, shade, tilt).

So if your 3 kW system averages even ~4 units/kW/day:

• Daily generation ≈ 3 × 4 = 12 units/day
• Annual ≈ 4,000–4,500 units
• If your effective tariff is ₹6/unit, savings ≈ ₹24k–₹27k/year
• If net cost after subsidy is ~₹1.3–₹1.7 lakh, payback often lands around 5–7 years (faster if your tariff is higher and you self-consume more daytime power).

The real payback killer: exporting too much at a low credit rate, while buying power back at a high slab rate. Aim to use solar during the day (washing machine, ironing, water pumping, pre-cooling, etc.).

10) My practical advice: how to get a “fair” rooftop solar price

1. Compare quotes by specification, not by total amount
• Ask for panel model, inverter model, structure spec, BOS list.
2. Don’t under-buy safety
• SPDs, earthing, proper DBs, correct cable sizing = fewer failures.
3. If your roof gets shade, fix shade first
• Shade can cut output and reduce ROI more than any “expensive brand upgrade.”
4. Size by your units + roof + daytime usage
• Bigger isn’t always better if your export credit is low.