☀️ Solar Desk
3kW Solar Panel Price in West Bengal with Subsidy (2026): Complete Cost Breakdown
Current prices of 1–5kW rooftop solar systems in West Bengal, actual cost after the PM Surya Ghar subsidy, installation charges and how to choose the right system size.
Before deciding to install rooftop solar, everyone’s first question is — “What will it cost, and how much will I pay out of pocket after the subsidy?” In this guide we lay out the complete math for 1 kW to 5 kW solar systems in the West Bengal context.
1. Price table: before and after subsidy
| System | Installation cost (approx.) | PM Surya Ghar subsidy | Actual cost |
|---|---|---|---|
| 1 kW | ₹65,000–80,000 | ₹30,000 | ₹35,000–50,000 |
| 2 kW | ₹1.00–1.25 lakh | ₹60,000 | ₹50,000–65,000 |
| 3 kW | ₹1.40–1.80 lakh | ₹78,000 | ₹70,000–1,00,000 |
| 5 kW | ₹2.20–2.80 lakh | ₹78,000 (maximum) | ₹1.40–2.00 lakh |
Prices are approximate market rates, September 2026. Mono PERC/topcon panels cost a bit more than polycrystalline but occupy less roof space and generate more power.
2. What does the cost include?
The budget of a complete on-grid system splits roughly like this:
- Solar panels — about 50% of total cost. You must use ALMM-listed DCR panels (a subsidy condition).
- Inverter (string inverter) — about 15–20%. BIS-approved brands (Luminous, Tata Power Solar, Waaree, Microtek, etc.).
- Mounting structure — galvanised iron/aluminium frames; correct anchoring is essential to withstand wind speeds.
- Cables, ACDB/DCDB, earthing and lightning arrester — don’t skimp on these for safety’s sake.
- Installation and labour charges — a registered vendor also handles the net metering paperwork.
3. How many kW do you need? The simple math
Estimate from your monthly electricity bill:
| Monthly usage | Recommended system | Roof space (approx.) |
|---|---|---|
| ~120 units | 1 kW | 80–100 sq ft |
| ~250 units | 2 kW | 160–200 sq ft |
| ~300–350 units | 3 kW | 240–300 sq ft |
| ~500+ units | 5 kW | 400–500 sq ft |
Remember: generation is highest when the roof faces south and is shadow-free. Shadow from a tall neighbouring building or tree reduces output significantly.
4. How long does it take to recover the cost?
Taking a 3kW system as an example:
- Actual cost (after subsidy): approximately ₹80,000
- Monthly electricity savings: ~₹1,500–2,200 (depending on usage and tariff)
- Payback period: roughly 4–5 years
- Panel warranty: 25 years (performance); inverter: 5–10 years
In other words, after payback you get about 20 years of effectively free electricity — solar’s biggest attraction.
5. Five rules for choosing a vendor
- Choose a vendor registered on the PM Surya Ghar portal — otherwise you won’t get the subsidy.
- Compare at least 3 quotations — not just on price, but on panel brand and warranty.
- Visit an earlier customer’s installation (ideally one that’s 2–3 years old).
- Get the maintenance and fault-service period written into the contract.
- Don’t pay the full amount upfront — pay in stages.
Final word
In 2026, solar panel prices in West Bengal are the most favourable in five years — plus a government subsidy of up to ₹78,000. If you have the roof and the budget, a 3kW system is now the most balanced choice. Verify current prices and subsidy rates at pmsuryaghar.gov.in and with registered vendors.
❓ Frequently asked questions
How much does a 3kW solar system actually cost after subsidy?
In West Bengal, installation of a 3kW system costs roughly ₹1.4–1.8 lakh. After deducting the ₹78,000 PM Surya Ghar subsidy, the homeowner's actual cost comes to approximately ₹70,000–1,00,000.
How many kW of solar does my home need?
A simple rule: for every 100 units of monthly electricity consumption, plan for about 1 kW of plant capacity. If your household uses 300 units a month, a 3kW system is enough.
Should I choose an on-grid or off-grid system?
In towns and areas with reliable power, an on-grid (net metering) system is cheaper and subsidy-eligible. In areas with frequent load shedding, a hybrid system (with battery) is better, though costlier.