Kolkata · WBSEDCL homesFree home savings check

Kolkata · West Bengal

Rooftop solar for Kolkata homes — monsoon, humidity, bill first

Independent advice for domestic WBSEDCL connections in Kolkata and Howrah. Bay-of-Bengal weather cuts annual yield versus dry inland states — your slab bill still decides whether solar pays back after central CFA.

Kolkata’s monsoon and high humidity mean lower annual kWh per kW installed than Gujarat or Rajasthan brochure numbers suggest. The decision hinge is whether your WBSEDCL bill recovers net cost after PM Surya Ghar CFA. Sealix advises; we are not WBSEDCL and not your installer. Start with the free home check.

WBSEDCL process

Most Kolkata metro domestic homes sit on WBSEDCL (West Bengal State Electricity Distribution Company). Rooftop solar under PM Surya Ghar selects WBSEDCL on pmsuryaghar.gov.in, then follows DISCOM feasibility, net-meter installation, and commissioning steps published on the DISCOM portal.

Load enhancement may apply if applied PV capacity exceeds sanctioned load — factor any published charges into net economics.

PM Surya Ghar CFA

Central residential CFA is commonly ₹30,000 / ₹60,000 / up to ₹78,000 for eligible 1–3 kW+ systems after commissioning. Full walkthrough: PM Surya Ghar guide.

Monsoon and humidity — plan honestly

June–September cloud cover and pre-monsoon thunderstorms reduce daily generation. Persistent humidity accelerates corrosion on mounting hardware and demands sensible inverter placement — not a rooftop edge exposed to driving rain. Size from annual bill units, not a pan-India “5 kWh/kW/day” marketing slide.

Kolkata terrace realities

North Kolkata narrow lanes and multi-storey neighbours create shade pockets. South Kolkata bungalows with open terraces often perform better — but society flats on common roofs still need NOC before WBSEDCL moves. Run bill maths first so you do not burn society cycles on a plant that never pays back.

Sizing honesty

Many mid-bill Kolkata homes land near 3 kW to capture the full central CFA ceiling. Going to 5 kW adds capacity with no extra central CFA — see 3 kW vs 5 kW, ₹3,000/month bill guide, and net metering in India.

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