Solar Panel Installation Cost
Solar panel installation cost in India in 2026 ranges from ₹55,000 to ₹85,000 per kW for a complete, professionally installed residential on-grid system. This figure covers everything: panels, inverter, mounting structure, wiring, DC/AC protection, earthing, and commissioning, not just the panel hardware itself. A typical 3 kW system, sufficient for most 2-3 BHK homes, costs approximately ₹1.65 lakh to ₹2.55 lakh before subsidy, dropping to roughly ₹87,000 to ₹1.77 lakh after the central government's PM Surya Ghar subsidy of up to ₹78,000.
This guide breaks down exactly what you're paying for at each price point, why quotes vary so widely between installers, and how to tell a fair quote from an inflated one or a suspiciously cheap one that's cutting corners on components that matter.
Solar panel installation cost at a glance
Parameter | Details |
Cost per kW (complete installed system) | ₹55,000 to ₹85,000 |
Cost per watt breakdown | ₹55 to ₹85 |
Panel-only cost (Mono PERC) | ₹22 to ₹28 per watt |
Panel-only cost (Polycrystalline) | ₹18 to ₹22 per watt |
Panel-only cost (TOPCon, premium) | ₹28 to ₹36 per watt |
Inverter cost share | 15 to 25% of total system cost |
Central subsidy (PM Surya Ghar) | Up to ₹78,000 for systems 3kW and above |
Typical payback period | 3 to 5 years |
System lifespan | 25+ years (panel performance warranty) |
What "solar panel installation cost" actually includes
Most people searching for solar panel installation cost expect a single number, but the honest answer is that it's five separate cost components bundled together:
Component | Share of total cost | What it covers |
Solar panels (modules) | 40 to 50% | The PV modules themselves, priced per watt based on technology (Poly, Mono PERC, TOPCon, Bifacial) |
Inverter | 15 to 25% | Converts DC power from panels to usable AC power for your home |
Mounting structure | 8 to 12% | Galvanised steel or aluminium rails securing panels to your roof, critical for monsoon and wind resistance |
Wiring, DC/AC protection, earthing | 5 to 10% | Safety components often bundled but sometimes omitted in unusually cheap quotes |
Installation labour and commissioning | 10 to 15% | Physical mounting, wiring, testing, and net-metering paperwork coordination |
If an installer quotes significantly below ₹40/watt for a complete installed system, it's worth asking directly what's been left out. Cutting corners on mounting structure or wiring protection is the most common way installers hit an artificially low headline price.
Solar panel installation cost by system size
System size | Cost before subsidy | Applicable subsidy | Cost after subsidy | Typical household fit |
1 kW | ₹65,000 to ₹85,000 | ₹30,000 | ₹35,000 to ₹55,000 | Small apartment, minimal load |
2 kW | ₹1,30,000 to ₹1,70,000 | ₹60,000 | ₹70,000 to ₹1,10,000 | 1-2 BHK, moderate use |
3 kW | ₹1,65,000 to ₹2,55,000 | ₹78,000 (maximum) | ₹87,000 to ₹1,77,000 | 2-3 BHK, most common residential size |
4 kW | ₹2,40,000 to ₹3,20,000 | ₹78,000 (capped) | ₹1,62,000 to ₹2,42,000 | 3-4 BHK, higher consumption homes |
5 kW | ₹3,00,000 to ₹3,60,000 | ₹78,000 (capped) | ₹2,22,000 to ₹2,82,000 | Large home, water pump, AC usage |
10 kW | ₹6,20,000 to ₹7,20,000 | Not applicable (residential subsidy caps at 3kW+ contribution) | Full cost, minus any state-specific top-up | Large villa or small commercial |
If you're specifically evaluating the 4kW bracket, our dedicated 4kW solar panel price guide covers city-wise pricing and exact component breakdowns for that capacity.
PM Surya Ghar subsidy structure explained
System capacity | Subsidy rate | Maximum subsidy |
Up to 2 kW | ₹30,000 per kW | Up to ₹60,000 |
2 kW to 3 kW (additional capacity) | ₹18,000 per kW | Additional ₹18,000 |
3 kW and above | Capped regardless of size | ₹78,000 maximum |
Some states add their own top-up subsidies on top of the central scheme. For example, Delhi and Uttar Pradesh have offered additional per-kW subsidies for systems up to 3 kW, and Maharashtra has disbursed over ₹1,870 crore across 2.5 lakh+ installations under combined central and state schemes. Always verify current state-specific top-ups with your local DISCOM, since these change periodically.
Why solar panel installation cost varies between installers
Factor | Impact on price |
Panel technology (Poly vs Mono PERC vs TOPCon) | ₹10 to ₹15 per watt difference between basic and premium panels |
Inverter brand and type | Branded hybrid inverters (Solis, Havells, GoodWe) add ₹10,000 to ₹15,000 over budget models |
Roof type and structure | Flat concrete roofs are cheapest to install on; tiled or complex roofs increase mounting costs |
DCR compliance requirement | Subsidy-linked residential schemes typically require DCR (Domestic Content Requirement) panels, which affects available options |
ALMM listing | Government regulations (Approved List of Models and Manufacturers) require panels from ALMM-approved manufacturers for subsidy eligibility |
After-sales service quality | Installers offering dedicated maintenance, monitoring, and warranty support price accordingly higher |
City and local labour costs | Metro cities often see slightly higher installation labour charges than smaller towns |
Panel technology comparison: what affects your per-watt cost
Technology | Price per watt | Efficiency | Best suited for |
Polycrystalline | ₹18 to ₹22 | Lower (standard) | Budget installations with ample roof space |
Mono PERC | ₹22 to ₹28 | Higher than Poly | Most common choice for residential rooftops today |
TOPCon | ₹28 to ₹36 | Highest among common types | Space-constrained roofs needing maximum output per sq ft |
Bifacial | ₹25 to ₹32 | High, captures reflected light too | Open installations with reflective ground surface (light-coloured terrace, gravel) |
How to evaluate a solar installation quote
- Confirm the per-watt breakdown, not just the total price. Ask the installer to itemise panel cost, inverter cost, mounting cost, and labour separately
- Check panel technology and ALMM listing. A quote using DCR/ALMM-approved Mono PERC or TOPCon panels justifies a higher price than one using unlisted or lower-tier panels
- Verify subsidy inclusion. Confirm whether the quoted price is before or after the PM Surya Ghar subsidy, since some installers quote gross prices to appear cheaper
- Ask about warranty terms separately for panels and inverter. Panels typically carry 25-year linear performance warranties; inverters usually carry 5 to 10 years
- Request a site-specific generation estimate, not a generic number, since roof orientation, shading, and local sun-hours significantly affect actual output
FAQs
What is the solar panel installation cost in India?
Solar panel installation cost in India ranges from ₹55,000 to ₹85,000 per kW for a complete installed residential system in 2026, covering panels, inverter, mounting, wiring, and commissioning. A common 3 kW system costs ₹1.65 lakh to ₹2.55 lakh before subsidy.
Does solar panel installation cost include the government subsidy?
No, the base installation cost figures quoted by installers are typically before subsidy. The PM Surya Ghar subsidy (up to ₹78,000 for 3kW+ systems) is applied separately after installation, usually credited directly to your bank account once the system is commissioned and net-metered.
What is included in the solar panel installation cost per kW?
The per-kW cost includes solar panels/modules, the inverter, mounting structure (rails and clamps), wiring with DC/AC protection, earthing components, and installation labour with commissioning and net-metering paperwork support.
How much does a 3kW solar panel installation cost?
A 3kW solar system costs ₹1.65 lakh to ₹2.55 lakh before subsidy in most Indian cities. After applying the maximum PM Surya Ghar subsidy of ₹78,000, the net cost typically ranges from ₹87,000 to ₹1.77 lakh, making 3kW the most cost-efficient subsidy bracket for residential installations.
Why do solar installation quotes vary so much between companies?
Quotes vary based on panel technology (Polycrystalline vs Mono PERC vs TOPCon), inverter brand, mounting structure quality, roof complexity, and whether after-sales service and monitoring are included. An unusually low quote often means corners are cut on mounting quality or wiring protection.
Is solar panel installation worth the cost in 2026?
Yes, for most homes with consistent daytime electricity usage. Typical payback periods are 3 to 5 years, after which the system generates essentially free electricity for the remaining 20+ years of its 25-year warranty life, assuming reasonable maintenance and sun exposure.
What factors increase solar panel installation cost beyond the base price?
Roof reinforcement for older or weaker structures, electrical panel/wiring upgrades for older homes, complex roof shapes requiring custom mounting, higher-tier panel technology (TOPCon, Bifacial), and hybrid inverters with battery-ready capability all add to the base per-kW cost.
How is solar panel installation cost different from solar panel price alone?
Solar panel price refers only to the PV modules (₹18 to ₹36 per watt depending on technology). Solar panel installation cost refers to the complete working system including inverter, mounting, wiring, and labour, which is why the installed cost per watt (₹55 to ₹85) is significantly higher than the panel-only price.
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