Buy from verified suppliers in Kolkata, West Bengal. Compare prices, get free quotes, PM Surya Ghar subsidy ₹78,000.
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All Solar Mounting Structures SuppliersElectricity costs ₹6.5–9/unit via CESC. See your payback period in seconds.
The mounting structure holds your panels for 25 years, so it must handle local wind and rain. Hot-dip galvanised (HDG) steel and anodised aluminium are the common choices on flat RCC roofs in Kolkata; elevated structures leave usable space below.
| Type | Advantage | Watch out for |
|---|---|---|
| Hot-dip galvanised steel | Strong, economical | Check zinc coating thickness |
| Anodised aluminium | Light, rust-free | Costs more |
| Elevated structure | Roof space usable below | Needs stronger anchoring |
| Tin-shed / metal roof clamps | No drilling into RCC | For sheet roofs only |
A 3 kW rooftop system in Kolkata generates about 360 units a month. At CESC's tariff of ₹6.5–9/unit, that saves roughly ₹2,800 a month (₹33,600 a year). After the ₹78,000 PM Surya Ghar subsidy, a 3 kW system costs about ₹82,000–1,32,000, so it pays back in roughly 2.4–3.9 years. CESC handles net metering in Kolkata, West Bengal; your installer usually files the application. Get a precise figure with the solar calculator.