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Updated for FY 2026-27 · Income Tax Slabs New: EV vs Petrol cost calculator RBI Repo Rate: 5.50% Gold Price: ₹74,500/10g New: Step-Up SIP calculator Updated for FY 2026-27 · Income Tax Slabs New: EV vs Petrol cost calculator RBI Repo Rate: 5.50% Gold Price: ₹74,500/10g New: Step-Up SIP calculator
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Electric Scooter vs Petrol Bike Cost Calculator 2026: Calculate EV Savings

EV Cost Analysis Tool - 2026
Electric Scooter vs Petrol Bike - Running Cost & Break-Even Calculator
100% Free
1
Your Riding Details
Daily usage & petrol cost
km/day
Average daily riding — office, college, errands combined.
Rs /L
Current petrol rate in your city.
km/L
Real-world mileage — Activa, Access, Jupiter typically 45–52 km/L.
2
EV Investment Details
Price gap & electricity cost
Rs
On-road price difference after PM E-Drive & state subsidies. Typical 2026 gap: Rs 12,000–Rs 35,000.
Rs /unit
Average domestic DISCOM rate. Delhi ~Rs 5, Mumbai ~Rs 9, Bengaluru ~Rs 8/unit.
km/kWh
Most Indian EV scooters deliver 30–35 km per kWh. Leave at 32 for best average.
5-Year Net Savings With EV
Rs 0
After recovering the price gap
Break-Even Period
0 mo
Monthly Savings
Rs 0
Yearly Savings
Rs 0
Petrol Scooter
Per kmRs 0
MonthlyRs 0
5-Year FuelRs 0
5-Year ServiceRs 0
Electric Scooter
Per kmRs 0
MonthlyRs 0
5-Year PowerRs 0
5-Year ServiceRs 0
Enter your details to see your verdict.
Year-wise Cost & Savings Breakdown
Year Km Driven Petrol Cost EV Cost Net Savings

Quick Answer — Which Is Cheaper in 2026?

For most Indian riders commuting 25 to 40 km daily, an electric scooter is decisively cheaper. Running costs drop from Rs 2.10–2.30 per km on petrol to Rs 0.15–0.25 per km on electricity. That's an 85–90% saving on fuel alone.

The higher upfront cost of an EV — typically Rs 12,000 to Rs 35,000 after PM E-Drive subsidy — gets recovered in 1.5 to 2.5 years. After that, every rupee saved goes straight into your pocket. Over a 5-year ownership, expect Rs 60,000–Rs 1,10,000 in net savings depending on your daily distance.

The 3 Numbers That Matter

1. Petrol cost per km: Rs 2.10–Rs 2.30
2. EV cost per km (home charging): Rs 0.15–Rs 0.25
3. Break-even on typical Rs 35,000 price gap: ~1.9 years at 25 km/day

Real Upfront Price Gap After Subsidies

The biggest myth about EV scooters is that they cost "a lakh more." In 2026, that gap has narrowed dramatically thanks to the PM E-Drive scheme and state-level incentives.

Petrol Scooter On-Road Prices (September 2026)

ModelEx-ShowroomOn-Road (Approx.)
Honda Activa 6GRs 76,000Rs 88,000
TVS Jupiter 110Rs 78,000Rs 90,000
Suzuki Access 125Rs 82,000Rs 95,000
TVS NTORQ 125Rs 85,000Rs 98,000

Electric Scooter Prices (After Rs 5,000 Subsidy)

ModelEx-ShowroomEffective PriceRange
Ola S1 XRs 84,999Rs 79,999108–242 km
TVS Orbiter (BaaS)Rs 49,999Rs 44,999158 km
Bajaj Chetak (base)Rs 99,000Rs 94,000131 km
Ather KonarcRs 1,02,000Rs 97,000100–200 km
TVS iQubeRs 1,20,000Rs 1,15,00094–123 km

Real on-road difference after all subsidies: Rs 12,000 to Rs 25,000 in most cities. Not a lakh. And with BaaS (Battery-as-a-Service) models like the TVS Orbiter at Rs 49,999, an EV can actually be cheaper upfront than a petrol scooter.

SVG Guide 1: Upfront Price Reality (2026)
Petrol Scooter (Activa on-road) Rs 88,000 EV Scooter (Ola S1 X after subsidy) Rs 79,999 Real gap in 2026: Rs 8,000 to Rs 35,000 — not Rs 1 lakh!

Running Cost Per KM — Full Comparison

This is where the game changes completely. Let's break down the exact math.

Petrol Scooter Running Cost

  • Petrol price (Sept 2026): Rs 102–Rs 108 per litre
  • Real-world mileage: 45–50 km/litre
  • Cost per km: Rs 2.10 – Rs 2.30

Electric Scooter Running Cost

  • Electricity tariff (residential): Rs 6–Rs 9 per unit (kWh)
  • EV efficiency: ~32 km per kWh
  • Cost per km: Rs 0.15 – Rs 0.25
Petrol Cost per KM = Petrol Price / Mileage
EV Cost per KM = Electricity Rate / EV Efficiency
Monthly Savings = (Monthly KM) x (Petrol Cost/km - EV Cost/km)

Ola CEO Bhavish Aggarwal has publicly stated that electric two-wheelers cost nearly 90% less to operate than petrol scooters. Our calculator confirms this: at Rs 102/L petrol and Rs 8/unit electricity, the ratio is Rs 2.27 vs Rs 0.25 per km — an 89% saving.

The Consumer Perception Gap

A 2025 survey found most consumers believe EVs are only 20–50% cheaper to run. The actual figure is closer to 85–90% for running costs alone. This perception gap is why many buyers underestimate EV savings.

Home Charging vs Public Fast Charging

Where you charge makes a huge difference to your per-km cost.

Charging TypeCost per UnitCost per KMBest For
Home AC (15A socket)Rs 6–Rs 9Rs 0.15–Rs 0.25Daily commute
Society / Office chargingRs 10–Rs 14Rs 0.30–Rs 0.45Secondary option
Public fast chargingRs 18–Rs 25Rs 0.60–Rs 0.90Road trips

All electric 2-wheelers in India come with portable chargers that plug directly into standard 15A three-pin household sockets. No special installation is needed. Most riders charge once every 2–3 days, and the monthly electricity bill rarely exceeds Rs 250–Rs 300 for 1,000 km of riding.

SVG Guide 2: Home vs Public Charging Cost
Home AC Socket Rs 0.15 - Rs 0.25 / km Public Fast Charging Rs 0.60 - Rs 0.90 / km

Maintenance Cost — The Hidden Savings

This is where petrol scooter owners get surprised when they actually add it up. EVs have far fewer moving parts and no engine oil, spark plugs, filters, or exhaust systems.

Expense (Annual)PetrolElectric
Engine oil changeRs 1,200–1,800—
Oil filter + air filterRs 500–800—
Spark plugRs 200–400—
Belt / chain serviceRs 500–1,000—
Brake padsRs 800–1,200Rs 500–800
General service labourRs 1,000–1,500Rs 500–1,200
TotalRs 4,200–6,700Rs 500–2,000

Annual maintenance savings: Rs 3,000–Rs 5,000. Over 5 years, that adds Rs 15,000–Rs 25,000 of additional savings on top of fuel savings. EVs also have regenerative braking, which significantly extends brake pad life.

Battery Replacement Reality 2026

The biggest fear of EV buyers — and the most misunderstood cost.

How Long Does the Battery Actually Last?

Modern lithium-ion batteries are rated for 1,200 to 1,500 charge cycles, which translates to 5 to 8 years or 50,000 to 80,000 km of normal usage. Well-cared-for batteries (avoiding 0% and 100% extremes, not fast charging daily) can last well past warranty.

Replacement Costs (2026)

TypeEstimated Cost
Removable battery (small pack)Rs 35,000 – 50,000
Removable battery (large pack)Rs 70,000 – 85,000
Fixed battery (Ather 450X, iQube ST)Rs 72,500+
Industry average across brandsRs 45,000 – 90,000

The BaaS (Battery-as-a-Service) Solution

Hero Vida VX2 Go starts at Rs 59,490 under BaaS — a Rs 40,000 drop from the non-BaaS price. You pay a per-km subscription (~Rs 0.96/km) and get free battery replacement if performance drops below 70%.

Ather BaaS reduces the Ather Rizta to Rs 75,999 and the 450 Series to Rs 84,341. This eliminates the biggest financial risk of EV ownership.

Key Insight

By the time a battery replacement is needed (Year 6–7), your cumulative fuel savings alone will be Rs 80,000+. That easily covers the cost of a new battery pack — meaning the EV has already paid for itself many times over.

Government Subsidies — PM E-Drive 2026

The PM E-Drive scheme has been extended to March 31, 2028 with a total outlay of Rs 11,900 crore.

ParameterDetails
Subsidy rateRs 2,500 per kWh of battery capacity
Maximum per vehicleRs 5,000
Eligible vehiclesEx-factory price up to Rs 1.5 lakh
Total units covered45,79,120 units
Scheme validityApril 2025 – March 2028
Subsidy Reduced

The PM E-Drive subsidy was reduced from Rs 10,000 per vehicle (FY25) to Rs 5,000 per vehicle (FY26 onwards) as part of a planned tapering of EV support. Additional state-level subsidies in Delhi, Maharashtra, Tamil Nadu, and Gujarat can add Rs 5,000–Rs 15,000 more.

Resale Value & Buyback Programs

EV resale value was a genuine concern — but 2026 has changed the picture with assured buyback programs.

AgePetrol Resale ValueEV Resale Value
Year 175–80% of price60–70% of price
Year 350–55% of price40–50% of price
Year 530–40% of price25–35% of price

Assured Buyback Programs (2026)

  • Ather Assured Buyback: 60% after 3 years, 50% after 4 years
  • Hero Vida Assured Buyback: Up to 67.5% of ex-showroom price
  • TVS BaaS: Battery subscription model eliminates resale battery risk

Best Electric Scooters in India 2026

ModelPriceRangeBest For
Ola S1 XRs 84,999108–242 kmBest value for money
TVS Orbiter (BaaS)Rs 49,999158 kmLowest upfront cost
Bajaj ChetakRs 1.19 lakh131–153 kmPremium build quality
Ather KonarcRs 1.02 lakh100–200 kmBest software & charging network
TVS iQubeRs 1.20 lakh94–123 kmReliability & service network
Hero Vida VX2Rs 1.10 lakh93–128 kmRemovable battery
River IndieRs 1.46 lakh163 kmBad roads & heavy loads

When Petrol Still Makes Sense

EVs are not the right answer for everyone. Stick with petrol if:

  • You ride less than 500 km/month. At low usage, fuel savings won't recover the price gap within 5 years.
  • You don't have home charging. Relying only on public fast charging pushes per-km cost to Rs 0.60–0.90 — still cheaper than petrol, but break-even stretches to 4–5 years.
  • You frequently ride over 80 km/day. Range anxiety becomes real without access to fast chargers en route.
  • You live in an area with poor service network. Ather, Ola, and TVS have good coverage in metros; smaller towns may not.
  • You upgrade bikes every 2 years. EV resale in the first 2 years is worse than petrol.
Reality Check

If you ride less than 15 km per day, the EV break-even window takes 2.8 to 3 years. Beyond 3 years, an EV still delivers net savings — but the case is far less dramatic than for a 30+ km/day commuter.

Frequently Asked Questions

Which is cheaper — electric scooter or petrol bike?
For 25–40 km daily riding, an electric scooter costs Rs 0.15–Rs 0.25 per km versus Rs 2.10–Rs 2.30 per km for a petrol scooter. Monthly savings are Rs 1,800–Rs 2,050. The EV recovers its higher upfront cost in 1.5–2.5 years, after which it delivers pure savings.
How much does 1 km cost in an electric scooter?
At Rs 8 per unit home electricity tariff, an electric scooter costs about Rs 0.25 per km. At Rs 6 per unit, it drops to Rs 0.19 per km. Public fast charging costs Rs 0.60–Rs 0.90 per km — 3–4x more expensive but still cheaper than petrol.
How many years does an EV scooter battery last?
Modern lithium-ion batteries last 5–8 years or 50,000–80,000 km. Manufacturers provide 3–5 year warranty. Replacement cost is Rs 35,000–Rs 90,000 depending on capacity and brand. BaaS models eliminate this cost entirely through subscription.
Is PM E-Drive subsidy available in 2026?
Yes. The PM E-Drive scheme has been extended to March 31, 2028. Eligible electric two-wheelers up to Rs 1.5 lakh get Rs 2,500 per kWh subsidy capped at Rs 5,000 per vehicle. State-level top-ups in Delhi, Maharashtra, Tamil Nadu, and Gujarat can add Rs 5,000–Rs 15,000 more.
How many electricity units are consumed to charge an EV scooter fully?
A typical electric scooter battery pack (3 kWh capacity) consumes roughly 3 to 3.5 units of electricity for a 0% to 100% full charge. At Rs 8/unit, that's approximately Rs 24–Rs 28 per full charge, giving 90–115 km of range.
Can electric scooters be charged at home using a normal 15A socket?
Yes. All electric 2-wheelers in India come with portable chargers that plug directly into standard 15A three-pin household power sockets. No special installation is needed. Charging time is typically 4–6 hours for a full charge.
What is the battery replacement cost for an electric scooter in 2026?
Battery replacement costs range from Rs 35,000 to Rs 90,000 depending on capacity and brand. Removable battery packs are generally cheaper to replace than fixed units. BaaS models like Hero Vida VX2 Go and Ather Rizta eliminate this cost entirely through subscription.
Do electric scooters have better resale value than petrol scooters?
Currently, petrol scooters retain value better in the first year (20–25% loss vs 30–40% for EVs). However, assured buyback programs from Ather (60% after 3 years) and Hero Vida (up to 67.5%) are closing this gap. By Year 5, the difference is only 5–10%.
How much does an electric scooter service cost per year?
Annual service for an electric scooter costs Rs 500 to Rs 2,000, compared to Rs 4,200 to Rs 6,700 for a petrol scooter. Over 5 years, this alone saves Rs 15,000–Rs 25,000 on top of fuel savings.
Is an electric scooter worth buying for 15 km daily ride?
If your daily ride is 15 km, the break-even payback window takes approximately 2.8 to 3 years. Beyond 3 years, an EV scooter delivers net financial savings compared to a petrol scooter. If you ride less than 500 km/month, a petrol scooter may still make more financial sense.
How much does an EV scooter save over 5 years?
For 25 km/day riding at Rs 102/L petrol and Rs 8/unit electricity, an EV saves approximately Rs 90,000 in fuel over 5 years, plus Rs 15,000–Rs 25,000 in maintenance. Total 5-year savings: Rs 1,05,000–Rs 1,15,000, after subtracting the Rs 35,000 price premium.
Can I use this calculator offline?
Yes. This calculator runs entirely in your browser without any server calls. After the page loads, you can turn off your internet and still use it. Your financial data never leaves your device.
Is this calculator free?
Yes, 100% free. No signup, no paywall, no ads, no hidden charges. Runs entirely in JavaScript on your device. Your inputs are never sent to any server.

Solar Panel Payback Period Calculator 2026: Calculate ROI & Electricity Savings

PM Surya Ghar 2026 - Subsidy Ready
Solar Panel Payback Period Calculator 2026 - Calculate ROI & Electricity Savings
Free Tool
1
Your Electricity Usage
Start here
Rs
Rs 500Rs 50 K
Your average monthly power bill before solar installation
Quick:
Rs/unit
Rs 4Rs 20
Average utility rate per kWh charged by your DISCOM
2
Solar System Details
Capacity and cost
kW
0.5 kW25 kW
1 kW generates approximately 4 units (kWh) per day in India
Common:
Rs
Rs 30 KRs 15 L
Gross cost including panels, inverter, mounting structure, and installation
Quick:
Rs
Rs 0Rs 2 L
PM Surya Ghar: Rs 30,000/kW for first 2 kW + Rs 18,000 for 3rd kW. Max Rs 78,000.
3
Your Solar ROI Result
Live calculation
Solar Payback and Lifetime Savings
Your Solar Payback Period
3.3 Years
With 25-year panel warranty, you get 21.7 years of free electricity
Net Investment
Rs 1,02,000
Monthly Savings
Rs 3,060
25-Year Savings
Rs 9,18,000
Solar Investment Breakdown Live
Gross System Cost Rs 1,80,000
Less: PM Surya Ghar Subsidy - Rs 78,000
Net Out-of-Pocket Cost Rs 1,02,000
Monthly Units Generated 360 units
Payback Period 3.3 Years
25-Year ROI
9x
Net Investment
Rs 1,02,000
25-Year Savings
Rs 9,18,000
+
Excellent Payback - 3.3 Years
Your solar system pays for itself in under 4 years. With a 25-year warranty, you get 21+ years of free electricity. This is an excellent investment.
25-Year Cumulative Savings Timeline
Timeline Units Generated Annual Savings Cumulative Savings Net Profit / ROI

Solar Panel Payback Period Calculator 2026 - Calculate ROI and Electricity Savings

The Solar Panel Payback Period Calculator 2026 tells you exactly how long it will take for your rooftop solar investment to pay for itself. In India, residential solar systems typically break even in 3 to 5 years under the PM Surya Ghar framework, and then generate essentially free electricity for another 20 to 22 years. This is one of the highest-return, lowest-risk investments available to Indian homeowners in 2026.

With the government's PM Surya Ghar Muft Bijli Yojana offering subsidies up to Rs 78,000 for a 3 kW system, and grid electricity rates rising 3-5% annually, the payback period has never been shorter. Our calculator runs the numbers in real time - adjust the sliders and see your exact payback period, monthly savings, and 25-year lifetime return.

Quick Answer

For a 3 kW system costing Rs 1.8 lakh with Rs 78,000 subsidy and Rs 8.5/unit grid rate: net investment is Rs 1.02 lakh, monthly savings are Rs 3,060, and payback is approximately 3.3 years. Over 25 years, you save Rs 9.18 lakh.

What is the Payback Period for Solar Panels

The payback period for solar panels is the time required for the cumulative electricity bill savings to equal the net out-of-pocket cost of installation. Once the payback milestone is reached, every unit of electricity your solar system produces is essentially 100% free profit - because the capital cost is fully recovered.

The formula is straightforward:

Payback Period (Years) = Net System Cost / Annual Electricity Savings

Where:
Net System Cost = Total Installation Cost - Government Subsidy
Annual Savings = (System kW x 4 units/day x 365) x Grid Rate per Unit

For example, a 3 kW system in India generates approximately 4,380 units per year (12 units per day). At Rs 8.5 per unit, annual savings are Rs 37,230. With a net cost of Rs 1,02,000, the payback period is 2.7 to 3.3 years depending on exact generation and tariff.

What is the Average Payback Period for Solar Panels in India

The average payback period for solar panels in India in 2026 is 3 to 5 years for residential rooftop systems, according to multiple industry sources. This is significantly faster than most developed countries because Indian grid electricity rates are relatively high (Rs 7-9/unit) while solar installation costs have fallen to Rs 55,000-85,000 per kW.

Country Average Payback Period Notes
India3-5 yearsPM Surya Ghar subsidy up to Rs 78,000
Australia3-5 yearsHigh grid rates, strong sun
US6-10 yearsVaries by state incentives
Germany7-10 yearsLower grid rates
UK8-12 yearsLower solar irradiance

Within India, the payback period varies by state. States with higher electricity tariffs and strong solar irradiance (Rajasthan, Gujarat, Maharashtra, Tamil Nadu) see payback in 3-4 years. States with lower tariffs may see 4-6 years.

What is a Good Payback Period for Solar Panels

The question "what is a good payback period for solar panels" has a clear answer in the Indian context: under 5 years is good, under 4 years is excellent, and under 3 years is exceptional.

Here is why this matters: modern solar panels come with a 25-year performance warranty. If your system pays for itself in 4 years, you get 21 years of virtually free electricity. If it takes 6 years, you still get 19 years of free electricity. Any payback under 6 years is a strong financial decision.

The Real Metric: Lifetime ROI

Payback period is only half the story. The other half is lifetime ROI. A 3 kW system that costs Rs 1.02 lakh net and generates Rs 9.18 lakh in savings over 25 years delivers a 9x return on investment. No fixed deposit, PPF, or debt fund comes close to this risk-adjusted return.

Solar Payback Calculation Formula

The exact formula used by every solar payback calculator is:

Step 1: Net Cost = Total Cost - Subsidy
Step 2: Monthly Units = System kW x 4 units/day x 30 days
Step 3: Monthly Savings = Monthly Units x Grid Rate
Step 4: Annual Savings = Monthly Savings x 12
Step 5: Payback (Years) = Net Cost / Annual Savings

Walking through a real 3 kW example:

  • Gross cost: Rs 1,80,000
  • PM Surya Ghar subsidy: Rs 78,000
  • Net cost: Rs 1,02,000
  • Monthly generation: 3 kW x 4 units x 30 = 360 units
  • Monthly savings: 360 x Rs 8.5 = Rs 3,060
  • Annual savings: Rs 36,720
  • Payback: Rs 1,02,000 / Rs 36,720 = 2.78 years

In practice, generation varies by season (higher in summer, lower in monsoon), so the real payback is typically 3 to 3.5 years. Our calculator accounts for average annual generation.

PM Surya Ghar Subsidy Structure 2026

The PM Surya Ghar Muft Bijli Yojana provides direct central financial assistance (CFA) to residential rooftop solar consumers. The 2026 subsidy structure is:

System Capacity Subsidy Structure Total Subsidy
1 kWRs 30,000 per kWRs 30,000
2 kWRs 30,000 per kWRs 60,000
3 kWRs 30,000 x 2 + Rs 18,000 x 1Rs 78,000
Above 3 kWCapped at 3 kW equivalentRs 78,000

The subsidy is credited directly to the consumer's bank account within 30 days of net-meter installation and commissioning. Additional state-level subsidies may apply in some states (e.g., Delhi adds a matching Rs 78,000, Bihar adds Rs 10,000/kW up to Rs 30,000).

Solar System Cost Breakdown by Capacity

Here are the indicative 2026 costs for residential solar systems in India, before and after PM Surya Ghar subsidy:

Capacity Gross Cost Subsidy Net Cost Monthly Savings Payback
1 kWRs 65,000Rs 30,000Rs 35,000Rs 1,0202.9 Yr
2 kWRs 1,20,000Rs 60,000Rs 60,000Rs 2,0402.5 Yr
3 kWRs 1,80,000Rs 78,000Rs 1,02,000Rs 3,0602.8 Yr
5 kWRs 3,00,000Rs 78,000Rs 2,22,000Rs 5,1003.6 Yr
10 kWRs 6,00,000Rs 78,000Rs 5,22,000Rs 10,2004.3 Yr

Note: Above 3 kW, the subsidy is capped at Rs 78,000, so the net cost scales linearly with capacity. This is why 1-3 kW systems offer the fastest payback - they get the highest subsidy per kW.

Solar Generation Metrics - Units per kW per Day

Understanding solar generation is critical for accurate payback calculation. Here are the key metrics for India in 2026:

Metric Value Notes
Units per kW per day4-5 kWhAverage across India
Units per kW per month120-150 kWh30-day month
Units per kW per year1,400-1,600 kWhYear-round average
Peak sun hours4.5-5.5 hours/dayEffective generation time
Performance ratio75-85%Accounts for losses

Rooftop area required: Approximately 10 square meters (100 sq ft) per kW. A 3 kW system needs about 300 sq ft of shadow-free rooftop area.

Frequently Asked Questions (FAQs)

What is the payback period for solar panels in India?
The payback period for residential rooftop solar in India is typically 3 to 5 years with the PM Surya Ghar subsidy, and 5 to 7 years without subsidy. Larger installations above 100 kW benefit from lower per-unit costs, resulting in faster payback of 3 to 5 years. States with higher electricity tariffs (Rs 8-10/unit) see the fastest payback.
What is a good payback period for solar panels?
A good payback period for solar panels in India is under 5 years. Under 4 years is excellent, and under 3 years is exceptional. Since solar panels come with a 25-year performance warranty, a payback of 3 to 5 years means you get 20 to 22 years of essentially free electricity. Any payback under 6 years is considered a strong financial decision.
What is the average payback period for solar panels in India in 2026?
The average payback period for solar panels in India in 2026 is 3 to 5 years for residential systems. This is faster than most developed countries because Indian grid tariffs are relatively high (Rs 7-9/unit) while solar installation costs have fallen to Rs 55,000-85,000 per kW.
How much does a 3 kW solar system cost in India in 2026?
A 3 kW rooftop solar system costs approximately Rs 1.5 lakh to Rs 2 lakh before subsidy in 2026. After the PM Surya Ghar central subsidy of Rs 78,000, the net cost is approximately Rs 72,000 to Rs 1.22 lakh depending on the installer and state. Some states like Delhi add a matching Rs 78,000 state subsidy, reducing net cost to near zero.
How many units does a 1 kW solar system generate per day?
A 1 kW solar system in India generates approximately 4 units (kWh) per day, or 120-150 units per month, averaged across the full year. The exact generation depends on location (solar irradiance), season, panel orientation, and system efficiency. Tamil Nadu and Rajasthan have some of the highest generation rates in India.
What is the PM Surya Ghar subsidy structure in 2026?
PM Surya Ghar provides Rs 30,000 per kW for the first 2 kW and Rs 18,000 for the 3rd kW. Total subsidy: 1 kW = Rs 30,000, 2 kW = Rs 60,000, 3 kW or higher = Rs 78,000 (capped). The subsidy is credited directly to your bank account within 30 days of net-meter installation.
How long do solar panels last in India?
Modern solar panels come with a 25-year performance warranty, typically guaranteeing at least 80% of original output at year 25. In practice, well-maintained panels can last 30+ years. The inverter, however, usually needs replacement every 10-12 years, costing Rs 15,000-25,000 for a residential system.
Is rooftop solar worth it for middle class homes in India?
Yes, rooftop solar is one of the best financial decisions for middle-class Indian homes. With the PM Surya Ghar subsidy, a 3 kW system pays for itself in 3-4 years and then generates free electricity for 20+ years. It also protects you from 3-5% annual grid tariff increases and provides a 9x lifetime return on investment.
What happens to my solar payback on cloudy days or during monsoon?
On overcast or rainy days, solar generation drops by 40-70%. However, the annual average generation accounts for this. Under net metering, your grid connection supplies power when solar generation is low, and you export excess power in summer months. The annual payback calculation already factors in seasonal variation.
How much rooftop area is needed for a 3 kW solar system?
A 3 kW solar system requires approximately 30 square meters (300 square feet) of shadow-free rooftop area. The rule of thumb is 10 square meters (100 sq ft) per kW of installed capacity. East or west-facing roofs also work, with minor efficiency loss compared to south-facing roofs.
Is this Solar Panel Payback Calculator free to use?
Yes, this calculator is 100% free with no signup, no ads, and no hidden charges. It runs entirely in your browser using JavaScript. Your financial data never leaves your device. Use it as many times as you want to compare different system sizes, subsidy scenarios, and electricity tariffs.
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