Before any customer signs a solar contract, they ask one question: "Total kitna padega?" The number they need is not the gross system cost, it is the net outlay after the PM Surya Ghar subsidy, the state top-up if applicable, and the monthly EMI against their electricity bill saving. Most EPCs quote only the gross number and lose deals to the sticker shock. The ones who present the full four-number picture close significantly more.
This guide covers every residential system size from 1 kW to 10 kW, with actual ₹ figures, the MNRE central subsidy at each size, state-specific scenarios for Gujarat and Maharashtra, and payback period calculations. Use this as the reference for your next proposal.
Key takeaway
The MNRE central subsidy caps at ₹78,000 for systems at or above 3 kW. For a 3 kW system in Gujarat costing ₹1,55,000, the net cost after ₹88,000 combined subsidy (central + GEDA) is ₹67,000. At IREDA's 7% over 10 years, the EMI is ₹778/month against ₹2,500/month in bill savings. The system pays for itself before the loan ends.
The Cost-After-Subsidy Ladder, QuickEstimate's Framework
Every PM Surya Ghar financial conversation involves four numbers. QuickEstimate calls the structure that maps these four numbers across system sizes the Cost-After-Subsidy Ladder, a way to show customers exactly where they land financially depending on which system size they choose.
Step 1, Gross Cost: What the EPC charges for the complete system including ALMM-compliant panels, string inverter, BOS components, mounting structure, DC/AC cabling, earthing, net metering application assistance, commissioning, and GST.
Step 2, Central Subsidy: MNRE's Central Financial Assistance (CFA) under PM Surya Ghar: ₹30,000 per kW for the first 2 kW, ₹18,000 for the third kW, capped at ₹78,000. No additional central subsidy above 3 kW.
Step 3, State Top-Up: Additional subsidy from state governments where applicable. Gujarat's GEDA runs a ₹10,000 top-up. Rajasthan, MP, and Haryana have partial programs. Many states have no active top-up as of mid-2026.
Step 4, Monthly Outlay: Net cost financed via IREDA/SBI at 7%, converted to an EMI, compared against the monthly electricity bill saving to show the net monthly cash flow impact.
Note. The central subsidy of ₹78,000 is a hard ceiling that does not increase with system size above 3 kW. A 5 kW system costs roughly 2.5× more than a 2 kW system but receives exactly the same ₹78,000 subsidy as a 3 kW system. This is why 3 kW is the financial sweet spot for most residential customers. See the full analysis at pmsuryaghar.gov.in and mnre.gov.in.
MNRE Subsidy Slabs, The Foundation
Before the comparison tables, the subsidy structure per MNRE guidelines effective 2024–2026:
- 1 kW: ₹30,000 per kW × 1 = ₹30,000
- 2 kW: ₹30,000 per kW × 2 = ₹60,000
- 3 kW: (₹30,000 × 2) + (₹18,000 × 1) = ₹78,000
- 4 kW and above: ₹78,000 (capped, no additional central subsidy)
- Maximum system size for residential subsidy: 10 kW per connection
Source: MNRE PM Surya Ghar operational guidelines{target="_blank" rel="noopener"}, updated January 2025.
Full Cost-After-Subsidy Ladder: 1 kW to 10 kW
The table below uses national average ALMM-compliant system costs for Tier-2 cities. Metro cities are typically 5–8% higher; rural areas may be 3–5% lower.
| System Size | Gross Cost (₹) | Central Subsidy (₹) | Net Cost (₹) | EMI 10yr @7% (₹/mo) | Monthly Saving (₹) | Simple Payback (yrs) |
|---|---|---|---|---|---|---|
| 1 kW | 58,000–65,000 | 30,000 | 28,000–35,000 | 325–406 | 700–900 | 2.6–3.3 yrs |
| 2 kW | 1,05,000–1,20,000 | 60,000 | 45,000–60,000 | 522–697 | 1,400–1,800 | 2.8–3.5 yrs |
| 3 kW ★ Sweet Spot | 1,45,000–1,65,000 | 78,000 | 67,000–87,000 | 778–1,011 | 2,100–2,700 | 2.9–3.5 yrs |
| 4 kW | 1,85,000–2,10,000 | 78,000 (cap) | 1,07,000–1,32,000 | 1,243–1,534 | 2,800–3,600 | 3.2–4.0 yrs |
| 5 kW | 2,30,000–2,65,000 | 78,000 (cap) | 1,52,000–1,87,000 | 1,765–2,173 | 3,500–4,500 | 3.5–4.5 yrs |
| 7.5 kW | 3,20,000–3,75,000 | 78,000 (cap) | 2,42,000–2,97,000 | 2,812–3,450 | 5,250–6,750 | 3.7–4.5 yrs |
| 10 kW | 4,20,000–5,00,000 | 78,000 (cap) | 3,42,000–4,22,000 | 3,973–4,903 | 7,000–9,000 | 4.0–5.0 yrs |
Gross cost based on ALMM-compliant mono-PERC panels at ₹28–32/Wp including GST, string inverter, mounting structure, DC/AC cabling, and commissioning. Monthly savings based on ₹7/unit average tariff, 4.2 kWh per kWp per day, 80% self-consumption. Payback = net cost ÷ annual saving. Source: QuickEstimate EPC network data, Q1 2026; MNRE subsidy slabs{target="_blank" rel="noopener"}; concessional loan rates from IREDA loan portal{target="_blank" rel="noopener"}.
State-Specific Comparison: Gujarat vs. Maharashtra
| 3 kW System Parameter | Gujarat (Surat / DGVCL) | Maharashtra (Pune / MSEDCL) |
|---|---|---|
| Typical system price (₹) | 1,55,000 | 1,62,000 |
| MNRE central subsidy (₹) | 78,000 | 78,000 |
| State top-up (₹) | 10,000 (GEDA) | 0 (no active state scheme, Q1 2026) |
| Net cost after all subsidies (₹) | 67,000 | 84,000 |
| EMI @7% / 10 years (₹/month) | 778 | 976 |
| Electricity tariff (avg, ₹/unit) | ~₹5.50 | ~₹8.50 (MSEDCL residential slab) |
| Monthly electricity saving (₹) | 2,000–2,400 | 3,000–3,800 |
| Net monthly benefit (saving − EMI) | +1,222 to +1,622 | +2,024 to +2,824 |
| Simple payback on net cost (years) | 2.3–2.8 | 1.8–2.3 |
₹ math. A Pune customer installing a 3 kW system for ₹1,62,000 receives ₹78,000 MNRE subsidy. Net cost: ₹84,000. IREDA 10-year EMI: ₹976/month. Monthly MSEDCL saving at ₹8.50/unit: ₹3,200 (average). Net monthly benefit: +₹2,224. Payback on net cost at ₹3,200/month saving: 26 months, under 2.2 years. After payback, the system saves ₹38,400 per year for the remaining 22+ years of panel life.
Why the Subsidy Percentage Drops Above 3 kW
The central subsidy as a percentage of gross cost tells a very clear story, and it is important to share this with customers who ask about 5 kW or 10 kW systems:
-
1
1 kW, Subsidy covers 46–52% of gross cost
Best percentage coverage. Net cost can be as low as ₹28,000. But monthly savings of ₹700–900 only make sense for very light consumption households (under 100 units/month). Not the right recommendation for an average Indian household.
-
2
2 kW, Subsidy covers 50–57% of gross cost
Excellent coverage. Net cost in Gujarat with GEDA top-up: only ₹40,000. EMI under ₹465/month. The easiest financial case to make for households consuming 100–200 units/month.
-
3
3 kW, Subsidy covers 47–54% of gross cost (sweet spot)
The financial sweet spot. Monthly saving exceeds EMI from Day 1 with a 10-year loan. Suitable for 200–300 units/month households. The most popular system size under PM Surya Ghar nationally.
-
4
5 kW, Subsidy covers only 29–34% of gross cost
Coverage drops sharply. Net cost roughly double that of 3 kW but with the same ₹78,000 subsidy. Payback extends to 3.5–4.5 years. Best for households consuming over 300 units/month or those adding EV charging load.
-
5
10 kW, Subsidy covers only 15–19% of gross cost
Lowest percentage coverage. Net cost ₹3.4–4.2 lakh. Financial case still works (4–5 year payback on high consumption), but this is primarily a large bungalow, small office, or high-consumption household use case. Not the typical residential PM Surya Ghar customer.
National Performance Numbers
₹78,000
Maximum central subsidy (3 kW and above)
MNRE, 2024–2026
3–4 yrs
Typical payback for 3 kW system, national average
CEEW analysis, 2025
25 years
Typical panel performance warranty
Panel manufacturer datasheets
3 kW
Most popular system size under PM Surya Ghar
MNRE portal data, Q1 2026
What Drives System Price Variation Between EPCs
Understanding why two EPCs quote different prices for the same kW helps you position your proposal credibly when customers compare.
Panel brand and type: ALMM-compliant mono-PERC panels from Indian manufacturers (Waaree, Adani Solar, Vikram Solar) cost ₹24–28/Wp. Premium bifacial or TOPCon panels cost ₹30–36/Wp. The difference on a 3 kW system is ₹18,000–24,000. Both are ALMM-compliant; performance differs by 3–7% over 25 years.
Inverter brand: A Sungrow or Goodwe string inverter for a 3 kW system costs ₹18,000–22,000. A premium Fronius or SolarEdge costs ₹35,000–50,000. The premium inverter is not necessary for a standard residential on-grid system.
Installation complexity: RCC flat roof is cheapest (₹4,000–6,000 mounting cost). Sloped tiles or metal sheet roof with custom structures adds ₹8,000–15,000. Three-floor terrace with long cable run adds further.
Watch out. Customers who compare only total price between EPCs often choose the cheapest quote without comparing equipment. An EPC using non-ALMM panels saves ₹15,000–20,000 on a 3 kW system but the customer's PM Surya Ghar subsidy disbursement will be blocked at Gate 3 inspection. Educate your customers to verify ALMM compliance on the MNRE portal, not just the price per watt.
Pros and Cons of Sizing Up vs. Right-Sizing at 3 kW
Pros of Right-Sizing at 3 kW
- ✓Maximum subsidy-as-% coverage, best ROI
- ✓Cash-flow positive from Day 1 with IREDA loan
- ✓Fastest payback period (2.9–3.5 years)
- ✓DISCOM sanction less likely to be rejected (DT headroom)
- ✓Easiest loan amount to document and approve
Cons of Sizing Up (e.g., 5 kW for 200-unit household)
- ✗Excess generation that net metering may not fully credit
- ✗Higher upfront cost with the same ₹78,000 subsidy
- ✗Longer payback period, lower percentage ROI
- ✗DISCOM may reject if system exceeds sanctioned load
- ✗Higher loan principal, longer EMI commitment
Fast tip. In Maharashtra, where MSEDCL tariffs reach ₹8–10/unit for residential slabs above 300 units, the electricity saving per kW is higher than the national average. This means payback periods in Pune and Mumbai are shorter than in states with lower tariffs, even without a state top-up. Always use the customer's actual MSEDCL tariff slab in your proposal calculation, not a generic ₹7/unit average.
How QuickEstimate Fits
- Proposal Generator, Generate a Cost-After-Subsidy Ladder proposal for any system size: gross cost → central subsidy → state top-up → net cost → EMI. Your customer receives a professional branded PDF with all four numbers in one view, delivered via WhatsApp in 60 seconds from the site visit.
- Quotation System, Maintain price lists for different system sizes and panel brands. Generate accurate ₹-specific quotes without manual calculation, eliminating the margin errors that come from manual spreadsheet proposals.
- Pipeline Management, Track which deals are stalled at the financial objection stage. Follow up those customers with the EMI-vs-saving breakdown, not just a reminder call.
For the complete state top-up picture that complements the central subsidy numbers above, see our guide to state top-up subsidies on PM Surya Ghar. For the bank loan process that turns the net cost into an EMI, see PM Surya Ghar bank loan process. Learn more about PM Surya Ghar subsidy slabs 2026 for additional detail on the MNRE slab structure.
What to Do This Week
Build your standard Cost-After-Subsidy Ladder table for 1 kW, 2 kW, and 3 kW systems with your actual pricing in your service area. Include the MNRE subsidy and any state top-up applicable to your market. Add this table to your WhatsApp proposal template so every customer sees the full picture within 60 seconds of asking.
Then calculate the EMI for your most common system size (likely 2–3 kW) at IREDA's 7% for both 5-year and 10-year tenures. Write down the monthly saving estimate for a typical customer in your area. If saving exceeds EMI, lead with that number in every conversation.
Finally, audit your recent lost deals. If any customer said "bahut mehnga hai" and you had not yet shown them the subsidy deduction and EMI breakdown, that is a recoverable deal. Call them back with the four-number picture.
Frequently Asked Questions
What is the total cost of a 3 kW solar system after PM Surya Ghar subsidy?
After deducting the MNRE central subsidy of ₹78,000 from a typical gross cost of ₹1,45,000–1,65,000, the net cost is ₹67,000–87,000. In Gujarat with the GEDA top-up of ₹10,000, the net cost falls to ₹57,000–77,000.
Is there any PM Surya Ghar subsidy above 3 kW?
No. The central subsidy is capped at ₹78,000 regardless of system size above 3 kW. A 5 kW or 10 kW system receives the same ₹78,000 as a 3 kW system. This is why 3 kW has the highest subsidy-as-a-percentage-of-cost ratio and is the most popular residential size under the scheme.
Which system size has the best financial return under PM Surya Ghar?
For households consuming 200–300 units per month, the 3 kW system offers the best return: highest subsidy percentage coverage, fastest payback (2.9–3.5 years), and positive monthly cash flow from Day 1 with a 10-year loan.
What is the monthly EMI for a 3 kW PM Surya Ghar system?
Using IREDA's 7% rate on a 10-year tenure for a net cost of ₹77,000, the EMI is approximately ₹895/month. Monthly electricity savings are approximately ₹2,100–2,700. Net monthly benefit: ₹1,200–1,800.
Does PM Surya Ghar subsidy cover hybrid or off-grid systems?
No. The central subsidy covers only grid-connected rooftop solar systems (on-grid solar). Hybrid systems with batteries and off-grid systems do not qualify for the PM Surya Ghar central subsidy. Some state schemes may offer partial incentives for hybrid, verify with your state nodal agency.
How does panel quality affect the cost and subsidy?
All panels must be on the MNRE ALMM list to qualify for PM Surya Ghar subsidy. Within ALMM-compliant products, quality varies from budget to premium. Higher-quality products cost more upfront but generate more kWh over 25 years. The subsidy amount is the same regardless of quality tier.
What is the payback period for solar with PM Surya Ghar subsidy?
For a 3 kW system: 2.9–3.5 years. For a 5 kW system: 3.5–4.5 years. For a 10 kW system: 4.0–5.0 years. These are simple payback calculations on net cost divided by annual saving. The IRR over 25 years is typically 15–20% for a right-sized system.
Why is the per-kW cost higher for 1 kW than 3 kW systems?
The inverter, mounting structure, wiring, and installation labour have significant fixed costs regardless of panel count. These fixed costs are spread over fewer panels in a 1 kW system, making the cost per kW higher. Economies of scale kick in from 2 kW onwards, and plateau around 5–10 kW where bulk procurement drives per-Wp cost down.
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