Solar EPC Company for Factories in Kerala: KSEB Rules, Approvals and Cost

A factory in Kerala can put 50 kW or more of solar on its roof under KSEB's rules. The 2025 KSERC regulations let industrial consumers net-meter 1 to 500 kW, but new plants above 25 kW must include storage. Larger plants use net billing, gross metering or open access. Turnkey cost sits in ₹24,000–32,000 per kW excluding GST.

Which metering route can a Kerala factory use?

The governing text is the Kerala State Electricity Regulatory Commission (Renewable Energy and Related Matters) Regulations, 2025, notified on 5 November 2025 under notification no. 3228/Con.Engg/2023/KSERC. They replace the older net metering regulations of 2020 and come into force on gazette publication, so ask KSEB for the gazette date. Early-2025 press coverage of the draft described much lower capacity caps; those were proposals, and the notified limits for industry are higher. Check the notified text, not the headlines.

Group net metering lets a net-metering-eligible consumer use surplus at its other premises in the same licensee's area. Virtual net metering in the notified text is aimed at residential, low-income, government, agricultural and very small consumers, so a typical factory will not use it. Existing net-metered plants stay on the old terms until they change capacity or reach the end of their useful life. Our note on open access solar covers the wheeling route in detail.

Two definitions matter when you size the plant. KSERC counts the plant's AC capacity, meaning the inverter rating, as its kW, and where an inverter is rated in kVA it allows 0.9 times the kVA as kW. The storage requirement is worked out on a generation potential reckoned at a 19% capacity utilisation factor. A 400 kW inverter plant on a 450 kVA contract demand therefore needs its storage sized on that formula, and the connected load or contract demand remains the ceiling whichever route you pick.

What approvals and inspections apply?

The process is online through KSEB's portal. The maximum timelines in the notification run as follows:

1. Apply for technical feasibility with an application fee; KSEB must answer within 15 days, and silence on a complete file is deemed feasibility.
2. Register within 45 days of the feasibility certificate. The notification sets a registration fee per kW, and the registration is valid for six months, extendable by up to six more.
3. Build the plant. A licensed electrical contractor submits the test-cum-completion report.
4. Obtain the Electrical Inspector's sanction for energising, where it applies under the CEA connectivity and safety regulations.
5. KSEB tests within seven working days of the report, signs a connectivity agreement, and connects within seven working days of signing; meter installation and commissioning are listed at 15 days from the report.

The notification also fixes technical rules: inverters must filter harmonics and isolate on grid failure, the plant must meet the Kerala State Electrical Inspectorate guidelines of 2023, and the cumulative distributed capacity on a distribution transformer is capped at 90% of its rating. Those limits make the transformer check the first real gate.

What does the cost band mean at 100 kW, 500 kW and 1 MW?

Our published band for turnkey commercial and industrial rooftop solar is ₹24,000–32,000 per kW excluding GST. It covers modules, inverters, structure, cabling, earthing, protection, installation and the DISCOM paperwork, and it is not a quotation. On our size pages the figures are about ₹28–32 lakh at 100 kW, about ₹1.30 crore at 500 kW and ₹2.40–2.60 crore at 1 MW, all before GST. See the 100 kW, 500 kW and 1 MW pages for what moves each number.

In Kerala three items sit outside the band and need their own line in a quote. First, the storage the net metering rules require for new plants above 25 kW; see our battery energy storage page. Second, structure and fixing choices for coastal air, where corrosion protection is typically specified more heavily. Third, any HT interface work. Generation also dips in the June to September monsoon, which the solar calculator takes into account through your location. For a factory comparing offers, the useful discipline is to ask each bidder to state the storage kWh, the inverter type and the metering route on the first page of the quotation, because two offers with the same headline per-kW figure can differ by exactly those three lines.

Where do Kerala's factory roofs sit?

KINFRA's site lists industrial parks across the state, including the electronic manufacturing cluster at Kakkanad, the hi-tech park at Kalamassery, industrial parks at Koratty, Ottapalam and Mattannur, and an integrated industrial and textile park at Palakkad. Large flat roofs in such parks are natural candidates for solar, but check each park's lease terms on roof use and any ground-rent clause before you design. ANERT, the state's renewable energy agency, publishes the state's solar policy and programme pages.

What should you confirm with KSEB before you sign?

• Which regime your category falls under, and the date the 2025 regulations took effect for your application.
• Hosting capacity at your distribution transformer, and the feasibility figure in kW.
• The grid support charges and any storage rule that applies to your capacity.
• Metering class: smart meters for 100 kW and above, and special energy meters for 1 MW and above.
• Whether the Electrical Inspector's sanction is required for your voltage level.

How Secured Engineers helps

We are a pan-India EPC contractor. Design is done in-house, and Fire NOC, CEIG and DISCOM net-metering filings are prepared in-house, with MEPF and solar available under one contract. We work from offices in Noida (Delhi NCR) and Ludhiana, across 535+ projects in 18+ states, with 89.77% repeat clients. Kerala is not among our published project locations, so we treat a Kerala job as a mobilisation from those offices and agree the site-team arrangement in writing before the order.

To test your own numbers, open the solar EPC service page and the calculator, then message us on WhatsApp, call +91 70099 85817, or request a free proposal with your roof size, connected load and tariff category.