How Much Does a Rooftop Solar System Cost in India? (Detailed 2025 Pricing)

The most common question we get is simple: how much does rooftop solar cost in India today? The answer depends on system size, technology (on-grid vs hybrid), panel quality (Tier-1 mono PERC, TOPCon, N-type), and your state's installation labour rates. This guide gives you realistic 2025 numbers so you can budget before talking to any installer.

Average rooftop solar prices in 2025

For a standard on-grid system with Tier-1 mono PERC panels, the typical all-inclusive price (panels, inverter, structure, wiring, net-metering, installation, GST):

• 1 kW — ₹65,000 to ₹85,000 (subsidy ₹30,000 → net ₹35,000–₹55,000)
• 2 kW — ₹1,20,000 to ₹1,55,000 (subsidy ₹60,000 → net ₹60,000–₹95,000)
• 3 kW — ₹1,75,000 to ₹2,20,000 (subsidy ₹78,000 → net ₹97,000–₹1,42,000)
• 5 kW — ₹2,80,000 to ₹3,50,000 (subsidy ₹78,000 → net ₹2,02,000–₹2,72,000)
• 10 kW — ₹5,40,000 to ₹6,80,000 (subsidy ₹78,000 → net ₹4,62,000–₹6,02,000)

Hybrid (battery-backup) systems cost more

If you want power during outages, you need a hybrid inverter and lithium battery. Add roughly ₹50,000–₹75,000 per kWh of battery on top of the on-grid price. A 5 kW hybrid system with a 5 kWh lithium battery typically lands between ₹5.5 lakh and ₹7 lakh.

What drives the cost up or down

• Panel technology: TOPCon and N-type panels cost 8–15% more than mono PERC but produce more units, especially in low-light conditions.
• Inverter brand: Tier-1 inverters (Sungrow, Growatt, Solis, Polycab, Microtek) cost more but come with 10-year warranties.
• Mounting structure: GI structures are cheaper than hot-dip galvanised, but rust faster in coastal areas.
• Roof type: Sloped roofs and elevated structures need extra material and labour.
• Net metering work: Some DISCOMs charge inspection and meter fees that add ₹2,000–₹8,000.

Payback period in 2025

For a 3 kW system in a state with average tariffs (~₹7/unit) generating 360–420 units a month, your monthly bill drops by ₹2,500–₹3,000. After the ₹78,000 subsidy, the system pays for itself in 3.5 to 5 years. Panels carry 25-year linear performance warranties, so you essentially get 20+ years of free electricity after payback.

Hidden costs to watch for

• Cable runs longer than 25 metres can add to wiring cost.
• Earthing pit and lightning arrester (mandatory in many states): ₹3,000–₹6,000.
• AMC (annual maintenance contract): ₹1,000–₹3,000 per kW per year, optional.

How to get an honest quote

Ask for an itemised quotation that lists panel make and model, inverter make and model, structure GSM, cabling brand, MC4 connectors, ACDB/DCDB, and installation timelines. Steer clear of "all-in-one" quotes that hide the panel and inverter brand — that is where corner-cutting happens.

Get a transparent itemised quote from Siyag Group — no hidden fees, no surprise add-ons.