23 October 2026
A 3 kW solar system costs ₹1,65,000 to ₹2,25,000 in India in 2026 before subsidy. After the PM Surya Ghar subsidy of ₹78,000, you pay ₹87,000 to ₹1,47,000 out of pocket. The system generates 270 to 360 units a month, needs 250 to 300 sq ft of shade-free roof, and pays for itself in roughly three and a half to four and a half years.
That is the short answer. The rest of this guide shows where the money goes component by component, which quotes are too cheap to trust, what the subsidy actually requires, and how the number changes between Gujarat and Himachal Pradesh. We build the modules that go into these systems, so the prices below are what we see installers quoting every week, not a brochure figure.
| Component | Cost range | Share of system |
| Solar modules (3 kW) | ₹66,000 to ₹90,000 | 40 to 50% |
| Inverter (3 kW on-grid) | ₹18,000 to ₹45,000 | 11 to 20% |
| Mounting structure | ₹24,000 to ₹45,000 | 14 to 20% |
| Cables, earthing, protection | ₹15,000 to ₹25,000 | 9 to 11% |
| Installation labour and commissioning | ₹20,000 to ₹35,000 | 12 to 16% |
| Net meter, DISCOM fees, liaison | ₹3,000 to ₹15,000 | 2 to 7% |
| Total before subsidy | ₹1,65,000 to ₹2,25,000 | 100% |
Modules are the biggest line and the one where quality shows up later. Standard Mono PERC sits at ₹22 to ₹28 per watt at module level; N-type TOPCon costs 10 to 15% more and returns 8 to 12% more energy across 25 years. On a 3 kW system that upgrade is a few thousand rupees. Our guide to the latest solar panel technology in India explains what separates the two.
| Build quality | Before subsidy | PM Surya Ghar subsidy | Your net cost |
| Budget (Mono PERC, basic inverter) | ₹1,65,000 | ₹78,000 | ₹87,000 |
| Mid-range (Mono PERC half-cut, BIS inverter) | ₹1,95,000 | ₹78,000 | ₹1,17,000 |
| Premium (TOPCon N-type, monitored inverter) | ₹2,25,000 | ₹78,000 | ₹1,47,000 |
The PM Surya Ghar Muft Bijli Yojana pays ₹78,000 for any system of 3 kW or larger. That makes 3 kW the sweet spot for most homes: it is the smallest size that collects the full central subsidy, so every rupee of subsidy works harder here than on a 5 kW or 10 kW system where the amount stays capped.
The money reaches your bank account directly after commissioning, usually within 30 to 45 days. It does not pass through the installer, so treat any quote described as "subsidy already adjusted" with care and ask exactly what you are paying and what you will be refunded.
Several states add their own incentive on top of the central ₹78,000. Gujarat, Uttar Pradesh, Rajasthan, Bihar, Delhi and Maharashtra have all run additional residential support, generally in the ₹10,000 to ₹30,000 range for a 3 kW system, with conditions that change from year to year. Check the current scheme with your DISCOM before you sign, because the state component usually has its own registration step and a separate deadline.
| Region | Units per month | Units per year | Annual saving at ₹8/unit |
| Gujarat, Rajasthan, Madhya Pradesh | 400 to 450 | 4,800 to 5,400 | ₹38,400 to ₹43,200 |
| Maharashtra, Karnataka, Telangana, Tamil Nadu | 340 to 400 | 4,100 to 4,800 | ₹32,800 to ₹38,400 |
| Uttar Pradesh, Bihar, Punjab, Delhi | 300 to 360 | 3,600 to 4,300 | ₹28,800 to ₹34,400 |
| West Bengal, Assam, hill states | 270 to 320 | 3,200 to 3,800 | ₹25,600 to ₹30,400 |
A 3 kW system suits a home using 250 to 400 units a month: a three-bedroom house with a refrigerator, a washing machine, fans, lighting and one or two air conditioners used seasonally. If your bill regularly exceeds 450 units, size up and read our guide to 5 kW systems instead.
Take the mid-range build at ₹1,17,000 net, generating 4,300 units a year in a typical northern Indian city. At ₹8 per unit that is ₹34,400 saved in year one, so the system repays itself in about three and a half years. Grid tariffs rise 3 to 5% annually, which shortens that further in practice.
Across 25 years, allowing for module degradation of about 0.4 to 0.55% a year and one inverter replacement at around ₹30,000 somewhere near year twelve, a 3 kW system returns roughly ₹9 to ₹11 lakh of avoided electricity against ₹1.17 lakh spent. Even on conservative assumptions, nothing else on a household balance sheet behaves like that.
Export credits depend on your state's rules, which our guide to net metering in India sets out state by state. Those rules decide what your surplus units are worth, so read them before you size the system.
Three or four modules of 580 W to 745 Wp make up a 3 kW array, or six to eight panels in the older 400 to 550 W class. Fewer, larger modules mean less mounting hardware and fewer connections to fail, though they are heavier to carry up a staircase and need the roof area in one unbroken stretch.
Whatever size you choose, check the datasheet for BIS registration, ALMM listing, a 25-year linear output warranty guaranteeing at least 80% at year 25, and an IP68 junction box. Our BIS certification guide shows how to verify the number against the MNRE list, and the warranty guide explains what the two warranty types actually cover.
Credence Solar makes BIS-certified Mono PERC and N-type TOPCon modules from 580 W to 745 Wp at a 2.2 GW plant in Rajkot. We supply installers and dealers rather than homeowners directly, so ask your installer which model they are quoting and check it against our datasheets.
A 3 kW solar system is the best-value residential size in India in 2026 because it is the smallest system that earns the full ₹78,000 central subsidy. Budget ₹1,65,000 to ₹2,25,000 before subsidy and ₹87,000 to ₹1,47,000 after it, expect 270 to 450 units a month depending on where you live, and plan on payback inside four years. Spend the marginal rupee on the inverter and the mounting structure, not on shaving the module price.
Installers and dealers looking for module pricing in volume can contact our team.
₹1,65,000 to ₹2,25,000 before subsidy for a complete on-grid system including modules, inverter, structure, cabling and installation. After the ₹78,000 PM Surya Ghar subsidy, the net cost is ₹87,000 to ₹1,47,000. Premium builds with N-type TOPCon modules and monitored inverters sit at the top of that range.
₹78,000 from the central PM Surya Ghar Muft Bijli Yojana, which is the maximum the scheme pays at any system size. Several states add ₹10,000 to ₹30,000 on top, with their own registration process. The central amount is credited directly to your bank account after commissioning, typically within 30 to 45 days.
Between 9 and 15 units a day, which works out to 270 to 450 units a month. Gujarat and Rajasthan sit at the top of that range with 400 to 450 units monthly, while eastern and hill states produce 270 to 320. Output drops in monsoon months and peaks between February and May.
250 to 300 sq ft of shade-free roof. High-efficiency TOPCon modules need the lower end of that because they produce more watts per square metre. The area has to be unbroken and free of shadows from water tanks, parapets and neighbouring buildings between roughly 9 am and 4 pm.
It suits a household using 250 to 400 units a month, which covers most three-bedroom homes with a refrigerator, washing machine, fans, lights and seasonal air conditioning. If your monthly consumption is consistently above 450 units, a 5 kW system fits better, though the central subsidy stays at ₹78,000.
Roughly three and a half to four and a half years after subsidy, assuming a tariff near ₹8 per unit. Rising grid tariffs of 3 to 5% a year shorten that in practice. The system keeps running for 25 years or more, with output guaranteed at 80% or better in year 25.
