Bihar Solar Calculator 2026: BSEB Bill Elimination Audit
Bihar pays some of India's highest electricity tariffs (up to ₹7.75/unit). Flip the script — our 2026 Bihar-specific solar calculator factors in BSEB tariff slabs, PM Surya Ghar subsidies, and Gangetic plains irradiance data.
BSEB Tariff
₹5.25–₹7.75/unit
5.2–5.8 hrs/day
Bihar Sun Data
PM Surya Ghar
2026 Updated
NBPDCL/SBPDCL
Net-Metering Ready
Bihar Solar Savings Audit
Based on Patna/Gaya avg. household profile
Avg. BSEB Monthly Bill
₹4,500
Recommended Plant
3 kW
Estimated Subsidy
₹78,000
Break-even Point
4.2 Years
3 kW ROI Projection — Bihar (Patna)
BSEB Tariff Alert: Bihar charges up to ₹7.75/unit
That's 2.5× higher than Gujarat. Solar pays off faster here because every unit generated saves more money.
Why Bihar's High Electricity Tariff Is Your Solar Superpower
Bihar residents pay up to ₹7.75/unit — among the highest residential tariffs in India. Most solar ROI calculators miss this critical insight: the higher your tariff, the faster solar pays back, regardless of sunshine hours.
The BSEB Tariff Math
A 3 kW solar plant generating 150 units/month saves ₹7.75 × 150 = ₹1,162/month at the highest slab — that's ₹13,944/year from the top slab alone. Compare that to Gujarat where the same generation saves just ₹6.95 × 150 = ₹1,042/month.
Gangetic Plains Sunshine — Better Than You Think
Patna receives 5.5 peak sun hours/day and Gaya reaches 5.7 — comparable to Delhi (5.5) and better than Mumbai (5.0). Bihar winters are sunny, and monsoon months are partly offset by spring/autumn peaks.
The Compounding Effect
BSEB tariffs have risen 8% per year on average. Every tariff hike makes your already-installed solar panel more valuable. A solar plant installed today locks in your savings rate for 25 years while BSEB bills keep rising for your neighbours.
State Tariff vs Solar ROI Comparison
Gujarat (PGVCL)
Tariff: ₹1.85–6.95 | Sun: 5.8 hrs
5.5 yrs
payback
Tamil Nadu (TNEB)
Tariff: ₹2.25–6.40 | Sun: 5.5 hrs
3.5 yrs
payback
Rajasthan (JVVNL)
Tariff: ₹3.00–8.50 | Sun: 6.2 hrs
3.0 yrs
payback
Bihar (BSEB)
Tariff: ₹5.25–7.75 | Sun: 5.5 hrs
4.2 yrs
payback
Maharashtra (MSEDCL)
Tariff: ₹3.25–9.56 | Sun: 5.3 hrs
4.5 yrs
payback
West Bengal (WBSEDCL)
Tariff: ₹3.15–8.25 | Sun: 4.8 hrs
5.0 yrs
payback
Bihar ranks 3rd in solar ROI speed despite average sunshine — purely because of high BSEB tariffs
The BSEB 25-Year Forecast
3 kW Plant Cost
₹65,000
gross
After Subsidy
₹1,87,000
net outflow
Annual BSEB Savings
₹54,000
est. avg
25-Year Total Return
₹10 Lakh+
net profit
BSEB Solar System Sizer & ROI Calculator
Enter your monthly BSEB units and available rooftop. We calculate your ideal plant size, PM Surya Ghar subsidy, and 25-year BSEB savings projection.
BSEB Consumption Details
Find "Units Consumed" on your NBPDCL or SBPDCL bill
BSEB 2026 Tariff Slabs (BERC)
Rooftop Details
Flat, unshaded area only. Each kW needs ~80 sq.ft.
Why Bihar Solar Pays Off Despite Average Sun
High BSEB tariff (₹6.50–7.75/unit) means each solar unit saved = more ₹
5.5 sun hours/day in Patna — 94% as good as Delhi
PM Surya Ghar ₹78k subsidy slashes upfront cost by 40%
How to Apply for PM Surya Ghar in Bihar
Step-by-step NBPDCL/SBPDCL-specific application guide for Bihar residents claiming up to ₹78,000 solar subsidy.
Register on PM Surya Ghar Portal
pmsuryaghar.gov.inVisit pmsuryaghar.gov.in and create an account with your BSEB consumer number (from your NBPDCL or SBPDCL bill), Aadhaar, and mobile number.
Get BSEB Net-Metering Approval
NBPDCL / SBPDCL ApprovalSubmit your application to your respective DISCOM — NBPDCL (north Bihar: Muzaffarpur, Darbhanga, Bhagalpur) or SBPDCL (south Bihar: Patna, Gaya, Aurangabad). A field engineer will visit to approve roof feasibility.
Select MNRE-Empanelled Vendor
BREDA-Verified VendorThe portal lists Bihar-approved vendors. Only use empanelled installers — this is mandatory for subsidy eligibility. Check Bihar Renewable Energy Development Agency (BREDA) listings.
Installation & BSEB Bidirectional Meter
Net-Meter InstallationAfter installation, BSEB installs a net-meter (bidirectional). This tracks energy you export to the grid. Monthly excess generation is credited as ₹ adjustments on your BSEB bill.
Subsidy Disbursement
Direct Bank TransferAfter BSEB issues the net-metering connection, upload the commissioning certificate on the portal. The subsidy (₹30k–₹78k) is credited directly to your bank account within 30 working days.
Documents Required
Bihar-Specific Notes
NBPDCL (North Bihar)
Muzaffarpur, Darbhanga, Bhagalpur, Begusarai — nbpdcl.co.in
SBPDCL (South Bihar)
Patna, Gaya, Nalanda, Aurangabad, Jehanabad — sbpdcl.co.in
BREDA Helpline
Bihar Renewable Energy Dev. Agency: 0612-2504516
Typical Timeline
Application to subsidy: 45–90 days
Don't Miss Bihar's State Incentive
Bihar also offers a 30% state capital subsidy for solar under the Bihar Solar Policy — available on top of the PM Surya Ghar central subsidy. Check the current year's BREDA portal for eligibility before applying.
Bihar Solar FAQ — BSEB-Specific Answers
8 questions every Bihar resident should answer before going solar.
Absolutely yes — and here's why most people get this wrong. Bihar gets 5.2–5.8 peak sun hours/day (comparable to Delhi's 5.5 hrs). But more critically, BSEB charges up to ₹7.75/unit — one of India's highest domestic tariffs. So every unit your solar panel generates saves you ₹7.75 (vs ₹1.85 in Gujarat). A 3 kW plant in Patna typically pays back in 4.2 years and generates ₹10 lakh+ in 25-year savings.
Complete Your Bihar Solar Journey
From BSEB bill calculation to net-metering credits — every tool you need before and after going solar in Bihar.
Understand Your BSEB Bill First
Know your exact slab before calculating solar savings — BSEB has 5 slabs from ₹5.25 to ₹7.75/unit.
BSEB Bill CalculatorMaster Solar ROI Calculator
Compare Bihar results against any other state with our comprehensive all-India solar ROI calculator.
Master Solar ROI CalculatorPM Surya Ghar Subsidy Details
Full breakdown of PM Surya Ghar Muft Bijli Yojana — subsidy tiers, eligibility, and application walk-through.
PM Surya Ghar Complete GuideGoing Off-Grid? Add Battery Backup
Bihar faces frequent power cuts — calculate how much battery you need to stay powered during outages.
Battery Backup CalculatorTamil Nadu Solar — How Bihar Compares
See how Bihar's solar ROI stacks up against Tamil Nadu's TNEB-optimised solar calculations.
TN Solar CalculatorNet Metering Calculator
Calculate your exact BSEB net-metering credits: self-consumption vs export, and annual reconciliation.
Net Metering Calculator