Home Solar System in India: 2026 Complete Guide
India added over 3 GW of rooftop solar in FY 2025–26, the highest ever, driven by the PM Surya Ghar Muft Bijli Yojana. With electricity tariffs rising 6–8% every year and solar panel prices at an all-time low of ₹22–30 per watt, 2026 is the best time in history to go solar at home.
Step 1 — Choose the Right System Size
The single most important decision is sizing. Oversizing wastes money; undersizing means you still pay a large electricity bill. Use your monthly electricity bill in units (kWh) as your starting point:
| Home Type | Monthly Units | System Size | Net Cost (After Subsidy) | Monthly Savings | Payback |
|---|---|---|---|---|---|
| 1 BHK | 100–150 units | 1 kW | ₹30,000 | ₹900–1,200/mo | 2–3 yrs |
| 2 BHK | 200–250 units | 2 kW | ₹50,000 | ₹1,800–2,400/mo | 2–3 yrs |
| 3 BHK | 300–350 units | 3 kW | ₹1,02,000 | ₹2,700–3,800/mo | 3–4 yrs |
| 4 BHK | 400–500 units | 4–5 kW | ₹1.42–₹2.22 lakh | ₹3,600–5,000/mo | 3–5 yrs |
| Large home / Villa | 600–800 units | 6–10 kW | ₹2.52–₹5.22 lakh | ₹5,400–9,000/mo | 4–6 yrs |
* Net cost after PM Surya Ghar subsidy (max ₹78,000 for ≤3kW). Savings calculated at avg ₹9/unit tariff. Actual costs vary by brand and state.
Step 2 — Understand the PM Surya Ghar Subsidy
The PM Surya Ghar Muft Bijli Yojana launched in 2024 is the largest rooftop solar subsidy programme in Indian history. For residential consumers:
- 1 kW system: ₹30,000 subsidy (₹30,000/kW)
- 2 kW system: ₹60,000 subsidy (₹30,000/kW × 2)
- 3 kW system: ₹78,000 subsidy (₹60,000 for first 2kW + ₹18,000 for 3rd kW)
- Above 3 kW: No additional central subsidy — capped at ₹78,000
The subsidy is a Direct Benefit Transfer (DBT) — credited directly to your bank account within 30 days of your DISCOM commissioning the net meter. You do not need to chase any office. Register at pmsuryaghar.gov.in.
Step 3 — Check Your Roof
Your roof needs to be:
- Shadow-free between 9am–4pm (trees, water tanks, chimneys should not shade panels)
- Strong enough — a 3kW system weighs ~150kg. Most RCC roofs handle this fine.
- South-facing for maximum output (east or west facing gives 10–15% less generation)
- At least 150–200 sq.ft for a 2kW system
Use our Roof Area Calculator to verify your available space matches your target system size.
Step 4 — On-Grid vs Off-Grid: Which is Right for Your Home?
On-Grid (Grid-Tied) System — recommended for 95% of urban homes:
- No batteries required — exports surplus power to the grid
- Eligible for PM Surya Ghar subsidy and net metering
- Lower cost: ₹55,000–₹65,000/kW
- Works only when grid is available (powers off during outages)
Off-Grid System — for areas with frequent outages or no grid connection:
- Includes battery bank — higher cost: ₹90,000–₹1,20,000/kW
- Not eligible for PM Surya Ghar subsidy
- Works independently of the grid
Most urban homeowners should choose on-grid. Add batteries separately later if needed. See our Hybrid Solar Calculator if you want the best of both worlds.
Step 5 — Choose an MNRE-Empanelled Installer
To receive the PM Surya Ghar subsidy, your installer must be empanelled with MNRE (Ministry of New and Renewable Energy). Using a non-empanelled contractor blocks your subsidy. Find empanelled vendors at pmsuryaghar.gov.in or through our Verified Vendor Directory.
Total Savings Over 25 Years
A 3kW home solar system in India with a net investment of ₹1.02 lakh (post-subsidy) delivers approximately:
- Year 1–3: Payback period — savings offset your investment
- Year 4–10: ~₹3,000–4,500/month pure savings (growing with tariff hikes)
- Year 10–25: Total savings exceed ₹8–12 lakh
- Environmental: ~60 tonnes of CO₂ avoided over 25 years
Use our Solar ROI Calculator to get your personalized 25-year projection.
Home Solar — Application Steps (Quick Summary)
- Use our Panel Requirement Calculator to find your ideal system size.
- Register at pmsuryaghar.gov.in with Aadhaar + DISCOM consumer number.
- Get 2–3 quotes from MNRE-empanelled installers in your city.
- Complete installation (typically 2–4 days for residential systems).
- Submit commissioning documents to your DISCOM for net meter.
- Receive ₹78,000 subsidy in your bank within 30 days.