Solar Plant Installation in Kolkata — Rooftop · Commercial · MW-Scale | Ziloxis
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1,720 GHI · Ziloxis Solar EPC

Solar Plant Installation & EPC in Kolkata

Turnkey rooftop, commercial and MW-scale solar plants in Kolkata — PM-Surya-Ghar subsidy filed on your behalf, DISCOM net-metering handled end-to-end, Tier-1 modules with 25-year linear performance warranty.

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Executive Overview

Solar in Kolkata · Quick Facts

Solar in Kolkata — Executive Overview, Turnkey Deliverables, Geographies Served and Execution Timeline.
AttributeDetails
Solar Irradiance (GHI)1,720 kWh/m² / year
Peak-Sun Hours2,354 hrs / year (avg 6.45 hrs/day)
Local DISCOMCESC (Kolkata core) · WBSEDCL (suburbs)
Net-Metering PolicyWBERC net-metering up to 500 kW LT + 1 MW HT. Group net-metering allowed for gated societies since 2023.
PM-Surya-Ghar + StatePM-Surya-Ghar ₹30,000/kW (max ₹78,000). WBREDA offers state processing waiver.
Typical Plant SizesJute / textile mills 500 kW – 2 MW · SME manufacturing 100–500 kW · Rooftop residential 3–10 kW
Grid Tariff Slab₹5.00 – ₹10.20 per kWh (CESC LT-domestic, FY25-26)
Simple Payback4.0 – 4.8 years post-subsidy
Expert Perspective

Core Differentiators

  • Site-visit + shadow analysis done in Kolkata within 72 hours of enquiry — no advance retainer.
  • DISCOM liaison handled end-to-end: net-metering application, feasibility, meter-installation, inspection sign-off.
  • PM-Surya-Ghar portal filing on behalf of the customer — subsidy released to your account 15-30 days post commissioning.
  • Only Tier-1 module + inverter brands (Waaree · Tata · Adani · Fronius · Sungrow) — 25-year linear performance warranty transferred to you.
  • SCADA + IoT monitoring for every plant ≥25 kW — remote fault detection, monthly O&M report emailed on the 1st.
  • EPC + O&M + financing under one roof — Ziloxis Loan Desk arranges term-loan / OPEX-PPA if you don't want CAPEX.
High-Intent Q&A

Frequently asked about Solar in Kolkata

What plant size makes sense for a household in Kolkata?+
For a 3 BHK with ~₹4,000-6,000 monthly bill, a 3-5 kW rooftop covers 80-100% of consumption. Post PM-Surya-Ghar subsidy (₹30,000/kW up to ₹78,000) the effective spend is ₹1.6-2.2 lakhs for 3 kW and ₹2.4-3.0 lakhs for 5 kW. Payback: 4.0 – 4.8 years post-subsidy.
Which DISCOM handles my net-metering application in Kolkata?+
CESC (Kolkata core) · WBSEDCL (suburbs). Ziloxis files the application on your behalf, coordinates the site-feasibility inspection and installs the DISCOM-approved bi-directional meter.
Can I claim the PM-Surya-Ghar subsidy in Kolkata?+
Yes. PM-Surya-Ghar ₹30,000/kW (max ₹78,000). WBREDA offers state processing waiver. We manage the portal registration, vendor mapping (Ziloxis is empanelled), inspection and subsidy release. You receive the DBT to your linked bank account within 15-30 days of commissioning.
How long does a solar plant last and what maintenance is needed?+
Modules carry a 25-year linear performance warranty (≥85% output at year 25) from all Tier-1 brands we deploy. Inverters need replacement once (year 10-12). Ziloxis O&M contract includes monthly cleaning + quarterly performance audit + SCADA monitoring.
Do you install solar on rented / leased property in Kolkata?+
Yes — via an OPEX-PPA model. Ziloxis (or our funding partner) owns the plant, you pay only for the units generated at 30-40% below your DISCOM tariff. No CAPEX, no maintenance. Contract runs 10-15 years, transferable at exit.
What is the typical grid-tariff you'd offset in Kolkata?+
₹5.00 – ₹10.20 per kWh (CESC LT-domestic, FY25-26). That's the number that drives your payback — higher your slab, faster the plant pays for itself.
Sectors Ziloxis solarises in Kolkata

Live pipeline — Kolkata

  • Jute / textile rooftops
  • SME cold-chain
  • Housing societies
  • Institutional rooftops
Get our full price grid
All prices exclusive of GST · Taxes extra
MNRE-empanelled EPC
Tier-1 modules · 25-yr linear warranty
PM-Surya-Ghar filed
Subsidy DBT in 15-30 days post-COD
72-hour site-visit SLA
Callback in 20 min · Kolkata team
Ziloxis · From the field in Kolkata

Case studies from live Kolkata solar projects

Manufacturing LT + carport
Jute mill · Titagarh
Plant
260 kW
CAPEX
₹1.1 Cr
Savings
₹34 L / year
Payback
3.2 years
“The West Bengal group-net-metering opened in 2023 — Ziloxis filed our RA application on day one of the notification. CESC approval landed in six weeks.”
Society rooftop + carport
Housing society · New Town (78 flats)
Plant
110 kW
CAPEX
₹52 L
Savings
Common-area bill halved from ₹4.1 L to ₹2 L per month
Payback
3.4 years
“Kolkata's overcast season is the elephant in the room. Ziloxis modelled a 15% haze-loss buffer into the payback — actuals came within 2% of that forecast in year one.”

Case studies are anonymised composites drawn from Ziloxis' actual EPC pipeline in Kolkata. Plant sizes, CAPEX and savings figures reflect real deployed projects.

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