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Your home

Electricity use
kWh
From the "units consumed" line on your electricity bill.
m²
Shade-free space only. About 10 m² per kW.
Connection
4.5 h/day
Peak sun hours. 4.5 is typical for southern Bengal.
Running the PVGIS simulation for your roof…
Payback

Tap any number to see how it was worked out.

Grid vs solar over 25 years

3%

Month by month

PVGIS 5.3 · EU JRC

Solar potential across India

PVGIS 5.3 · 2005–2023
Map of yearly solar output per kW of panels across India and neighbouring countries

kWh produced per kW of panels a year, at the best fixed angle.

PVGIS © European Union, 2001–2026 · CC BY 4.0

On your roof

How this is calculated
  • Size = monthly units ÷ (30 × sun hours × 0.8), capped at roof area ÷ 10 m² per kW.
  • Generation = kW × sun hours × 365 × 0.8 (inverter, wiring, heat and dust losses).
  • Cost ₹55,000 per kW installed. PM Surya Ghar subsidy: ₹30,000/kW for the first 2 kW and ₹18,000 for the 3rd (max ₹78,000); 10% more in North-East and hill states, J&K, Ladakh and the islands (max ₹85,800). On-grid only.
  • Your bill uses your state board's latest domestic tariff (energy slabs + fixed charge), read from the regulator's tariff order. Electricity duty, fuel surcharges and state free-unit schemes are not included. Sanctioned load is assumed at about 1 kW per 100 units a month.
  • Net metering: solar units first cancel your own use, so the bill falls from the top slab down. Fixed charges stay.
  • Grid vs solar: bills rise by the % you choose each year; panels lose 0.5% output a year; upkeep is 1% of the system cost a year.
  • CO₂ = generation × 0.82 kg per kWh (CEA grid baseline).
  • Off-grid battery cost isn't included yet.
© 2026 Sagnik Kumar Nath · All rights reserved · Estimates only, confirm rates with your electricity board and pmsuryaghar.gov.in · Source
PVGIS 5.3 · EU JRC