Delhi Solar Calculator (BSES Rajdhani)
Rooftop solar payback for South and West Delhi homes on BSES Rajdhani, with the Delhi top-up, generation incentive and BRPL's PPAC.
Updated · By Niraj Kumar · 1 source
https://checkpre.com/energy/solar-calculator-delhi-bses-rajdhani
Your home
About 498 units a month on the BSES Rajdhani tariff. Use a year's average if your bill swings with the seasons.
Fine-tune
Sized to cover a year of your consumption, at 5.1 peak sun hours a day in Delhi.
About 100 sq ft per kW. Leave at 0 for no limit.
Typical for an on-grid system from an empanelled vendor. Replace it with your quote.
Indian residential tariffs have historically risen 4-7% a year.
Monocrystalline panels typically lose about 0.5% a year.
A 4 kW system makes about 478 units a month, 96% of your use. Your bill drops from ₹3,000 to about ₹0 in year one.
- Installed cost
- ₹2,20,000
- PM Surya Ghar subsidy
- − ₹78,000
- State top-up
- − ₹78,000
- Delhi Government top-up to PM Surya Ghar
- Net cost to you
- ₹64,000
- Saving in year one
- ₹53,203
- Return (IRR)
- 85.1% a year
- over 25 years, before tax
- CO₂ avoided
- 97 tonnes
- over 25 years
- You pay29%
- Central subsidy35%
- State top-up35%
Year-by-year cash flowShowHide
| Year | Units made | Bills without solar | Bills with solar | Upkeep and EMIs | Running total |
|---|---|---|---|---|---|
| 1 | 5,733 | ₹36,003 | ₹0 | ₹0 | -₹10,797 |
| 2 | 5,705 | ₹37,803 | ₹0 | ₹0 | ₹44,121 |
| 3 | 5,676 | ₹39,693 | ₹0 | ₹0 | ₹1,00,843 |
| 4 | 5,648 | ₹41,678 | ₹0 | ₹0 | ₹1,59,464 |
| 5 | 5,620 | ₹43,762 | ₹0 | ₹0 | ₹2,20,085 |
| 6 | 5,592 | ₹45,950 | ₹0 | ₹2,200 | ₹2,63,835 |
| 7 | 5,564 | ₹48,247 | ₹0 | ₹2,200 | ₹3,09,882 |
| 8 | 5,536 | ₹50,660 | ₹0 | ₹2,200 | ₹3,58,342 |
| 9 | 5,508 | ₹53,193 | ₹0 | ₹2,200 | ₹4,09,335 |
| 10 | 5,481 | ₹55,852 | ₹0 | ₹2,200 | ₹4,62,987 |
| 11 | 5,453 | ₹58,645 | ₹0 | ₹2,200 | ₹5,19,433 |
| 12 | 5,426 | ₹61,577 | ₹0 | ₹30,200 | ₹5,50,810 |
| 13 | 5,399 | ₹64,656 | ₹0 | ₹2,200 | ₹6,13,266 |
| 14 | 5,372 | ₹67,889 | ₹0 | ₹2,200 | ₹6,78,955 |
| 15 | 5,345 | ₹71,283 | ₹0 | ₹2,200 | ₹7,48,039 |
| 16 | 5,318 | ₹74,848 | ₹0 | ₹2,200 | ₹8,20,686 |
| 17 | 5,292 | ₹78,590 | ₹0 | ₹2,200 | ₹8,97,076 |
| 18 | 5,265 | ₹82,520 | ₹0 | ₹2,200 | ₹9,77,396 |
| 19 | 5,239 | ₹86,646 | ₹0 | ₹2,200 | ₹10,61,841 |
| 20 | 5,213 | ₹90,978 | ₹0 | ₹2,200 | ₹11,50,619 |
| 21 | 5,187 | ₹95,527 | ₹0 | ₹2,200 | ₹12,43,946 |
| 22 | 5,161 | ₹1,00,303 | ₹0 | ₹2,200 | ₹13,42,049 |
| 23 | 5,135 | ₹1,05,318 | ₹0 | ₹2,200 | ₹14,45,167 |
| 24 | 5,109 | ₹1,10,584 | ₹0 | ₹2,200 | ₹15,53,551 |
| 25 | 5,084 | ₹1,16,113 | ₹0 | ₹2,200 | ₹16,67,464 |
How the Delhi Solar Calculator (BSES Rajdhani) works
Saving₍y₎ = [Bill(U) − Bill(U − G₍y₎/12)] × 12 × (1 + e)^(y−1), G₍y₎ = kW × H × 365 × PR × (1 − d)^(y−1)This page uses the same method as the Solar ROI Calculator India, which explains each term and assumption in full.
Worked example
A Delhi home on BSES Rajdhani with a ₹3,500 monthly bill and a flat RCC roof, assuming prices rise 5% a year.
- 1Working the bill back through the BSES Rajdhani slabs, charges and duty gives about 557 units a month
- 2At 5.1 peak sun hours, 4.5 kW makes about 538 units a month, 97% of that use
- 34.5 kW at ₹55,000 per kW costs ₹2,47,500; PM Surya Ghar pays ₹78,000 and the Delhi Government top-up to PM Surya Ghar ₹78,000, leaving ₹91,500
- 4The first year saves ₹61,390, and the saving grows as tariffs rise
The system pays for itself in about 1.5 years and leaves the household about ₹19,29,746 ahead over 25 years.
Frequently asked questions
Is BSES Rajdhani more expensive than Tata Power-DDL?
The slab rates are the same across Delhi because DERC sets them, but the PPAC differs by DISCOM. BRPL was allowed 17.94% from June 2026 against TPDDL's 16%, so the same consumption costs slightly more on BSES Rajdhani and solar saves slightly more.
How do I apply for rooftop solar with BSES Rajdhani?
Register on the PM Surya Ghar portal with your BRPL CA number, choose an empanelled vendor, and apply for net metering through the portal. After installation BRPL inspects the system and fits a net meter; the central subsidy follows once it is commissioned, and the Delhi top-up through the state's own process.
How does net metering settle on BSES Rajdhani?
Net metering with a yearly settlement, plus a generation-based incentive under the Delhi Solar Policy paid on every unit the panels produce for the first five years.
Sources
Related calculators
- Solar ROI Calculator IndiaEnter your electricity bill and state to see the rooftop system you need, your PM Surya Ghar subsidy, payback period and 25-year return.
- Delhi Solar Calculator (TPDDL)Rooftop solar payback for North Delhi homes on Tata Power-DDL, with the Delhi top-up, generation incentive and 200-unit subsidy.
- Jaipur Solar Calculator (JVVNL)Rooftop solar payback for Jaipur on JVVNL, with Rajasthan's ₹17,000 top-up and some of India's strongest sunshine.
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