Rooftop solar in Patna
Calculator below is tuned to Patna's sunshine, not a generic national average.
- Peak sun
- ~4.8 hrs/day
- Generation
- ~3.8 units/kW/day
- Max subsidy
- ₹78,000
Where your money goes
Your 25-year money curve
What the planet gets
Based on India's grid emission factor (~0.82 kg CO₂/unit) and ~20 kg CO₂ absorbed per mature tree per year.
NBPDCL (north) and SBPDCL (south) handle net metering. Bihar's high effective tariffs make rooftop solar payback attractive where roof space allows.
Enter a valid monthly bill greater than ₹0 to see your results.
Solar in Patna: what's different locally
Patna's high effective tariffs make solar worthwhile despite moderate sun. Net metering timelines in Bihar run longer than the national average, persistence pays, literally.
DISCOM: SBPDCL serves Patna; keep application receipts and follow up actively.
Typical residential areas going solar: Kankarbagh, Boring Road, Rajendra Nagar, anywhere with a shadow-free roof works the same way.
| Electricity provider | NBPDCL / SBPDCL |
|---|---|
| Avg peak sun hours | ~4.8 hours/day |
| 3kW generates | ~342 units/month |
| Benchmark install cost | ~₹60,000/kW (gross, before subsidy) |
| 3kW total subsidy | ₹78,000 |
| Application timeline | 30-60 days |
Sun-hour figures are annual averages from public irradiance data, rounded, your roof's orientation and shading move the real number. Generation assumes a ~0.8 performance ratio (inverter losses, temperature, soiling).
Official portals, apply & verify here
We are not affiliated with any government body. Applications and current scheme rules live on these official portals, never pay anyone to "arrange" the subsidy for you.
Sources for this page
- PM Surya Ghar Muft Bijli Yojana (MNRE), subsidy slabs and process
- NBPDCL, tariff and net metering details
- Global Solar Atlas, city irradiance ballparks
Patna solar FAQs
How much does a 3kW solar system generate in Patna?
Roughly 342 units per month, based on Patna's ~4.8 peak sun hours per day (about 3.8 units per kW daily after real-world losses). High-sun months generate more, monsoon months less, this is the annual average.
What subsidy do I get for rooftop solar in Patna?
The same as everywhere in Bihar: ₹30,000 (1kW), ₹60,000 (2kW), ₹78,000 (3kW+) under PM Surya Ghar. Applications go through pmsuryaghar.gov.in.
Who handles net metering in Patna?
SBPDCL serves Patna; keep application receipts and follow up actively. Expect roughly 30-60 days for the full process.
Is solar worth it in Patna?
Patna's high effective tariffs make solar worthwhile despite moderate sun. Net metering timelines in Bihar run longer than the national average, persistence pays, literally.