Why eco pays

₹78,000

Max central subsidy (3 kW+)

PM Surya Ghar Muft Bijli Yojana: ₹30,000 (1 kW), ₹60,000 (2 kW), ₹78,000 (3 kW+).

Source: MNRE

3–5 yrs

Typical rooftop solar payback after subsidy

Panels warranted 25 years.

Source: Bridge to India / MNRE benchmark costs 2025-26

₹18–22k

Annual savings from a 3 kW system

Generates ~3,500–4,000 units/year at typical Indian tariffs.

Source: Mercom India, Dec 2025

8–12%

Annual electricity tariff rise (past decade)

Source: Central Electricity Authority

Months

Typical whole-home LED payback

LEDs use 75–90% less electricity than incandescent.

Source: US DOE

~8 mo

Solar cooker payback (field trials)

~38% household fuel savings documented.

Source: Biermann et al., Applied Energy

₹28,000+

Saved over 4 years (documented case)

₹18,000 solar cooker replaced 6 LPG cylinders/year.

Source: Mongabay India, 2024

15–40%

Less energy with underfloor vs radiators

Runs at 30–50°C water vs 60–80°C for radiators.

Source: Industry consensus / Wavin / IEA heat-pump data

2.9M

Premature deaths from household air pollution (2021)

Including 309,000 children under 5.

Source: WHO fact sheet

2.1B

People still cooking on open fires or inefficient stoves

Source: WHO, 2025

6.7M

Deaths/year from household + ambient air pollution

Source: WHO

20×

Indoor smoke can exceed WHO air-quality guidelines

Source: US EPA

44%

Of under-5 pneumonia deaths linked to household air pollution soot

Source: WHO

4.9 GW

Rooftop solar added in India (first 9 months of 2025)

161% YoY growth; ~2.4 million homes under PM Surya Ghar by Dec 2025.

Source: Mercom India

75–90%

Less electricity used by LEDs vs incandescent

Lifespan 25,000–50,000 hrs vs ~1,000 hrs (25–50× longer).

Source: US DOE

~15%

Of global electricity used for lighting

Source: IEA/DOE

4–7 kWh

Solar radiation per m²/day across India

Among the world's best cooking-solar resources.

Source: Field / climate data

50%

Less firewood with HRS clean combustion

Source: HRS field data