Last updated: 21 June 2026
Solar Subsidy Calculator in Bihar
Estimate a suitable rooftop solar size, central residential subsidy, net cost and savings using editable Bihar tariff and sunlight assumptions.
Independent calculator — not a government or DISCOM website.
Central subsidy slabs
For eligible residential households under PM Surya Ghar.
Up to 1 kW
₹30,000
Up to 2 kW
₹60,000
3 kW or higher
₹78,000
maximum
No extra central subsidy beyond 3 kW.
STATE ASSUMPTIONS
Planning inputs for Bihar
The calculator starts with ₹8 per unit and 4.2 units per kW per day. These are conservative placeholders for initial comparison—not published tariff or generation guarantees.
Tariff and solar yield are conservative planning assumptions, not an official quote. Edit them for your bill, roof and DISCOM tariff.
- Default tariff
- ₹8/unit
- Solar yield
- 4.2 units/kW/day
LOCAL CHECK
DISCOMs in Bihar
Your serving DISCOM depends on the connection address. The following names are included to help you identify where to verify current feasibility, metering and application guidance:
- SBPDCL
- NBPDCL
DISCOM names can change or be reorganised. Use the name printed on your latest electricity bill.
EXAMPLE
Typical 250-unit household
For a household using 250 units a month, at the editable state assumptions and ₹60,000 per kW installation cost, the calculator gives this worked example:
- System size
- 2 kW
- Central subsidy
- ₹60,000
- Net cost
- ₹60,000
- Monthly savings
- ₹2,000
This is an illustrative estimate, not a quotation. Change the calculator inputs to match your bill and roof.
Solar subsidy FAQs for Bihar
Clear answers, with the important caveats left in.
How much rooftop solar subsidy is estimated in Bihar?
The central estimate is ₹30,000 for 1 kW, ₹60,000 for 2 kW and ₹78,000 maximum for 3 kW or more for an eligible residential household. State support, if any, must be checked separately.
What solar yield does the Bihar calculator use?
It starts with 4.2 units per kW per day as a conservative state-level planning assumption. You should compare this with a site-specific installer estimate.
Which tariff is used for Bihar?
The editable default is ₹8 per unit. It is not an official tariff and may not match your slab, category, fixed charges or current DISCOM schedule.
Should I confirm the result with my Bihar DISCOM?
Yes. Confirm technical feasibility, metering, application steps, equipment requirements and final eligibility with the official portal and the DISCOM serving your connection.
Is this an official government calculator?
No. This is an independent planning tool and is not affiliated with the Government of India, MNRE, PM Surya Ghar or any DISCOM.
Compare your Bihar household
Enter your actual monthly units, tariff and available roof area for a more relevant estimate.