Commercial & Industrial Rooftop Solar in Kerala: LT & HT Tariff Offsets & 40% Accelerated Depreciation

Commercial power consumers in Kerala bear high utility tariffs to cross-subsidize agricultural and low-income domestic users. Commercial establishments (retail malls, educational colleges, hotels, office complexes) pay up to ₹11.50 per unit plus fixed demand charges, duty, and peak time-of-day (ToD) surcharges.

Installing an on-site commercial rooftop solar plant (ranging from 20 kW to 200 kW+) offsets high-rate grid consumption directly during daytime business hours when commercial loads (air conditioning, lighting, computing, machinery) are at their absolute peak.

In addition to monthly electricity savings, commercial solar investments offer compelling fiscal incentives under Indian tax laws:

1. Accelerated Depreciation (Section 32): Businesses can depreciate 40% of the capital cost of the solar plant in the very first financial year (or 20% if commissioned in the second half of the fiscal year). For a profitable company taxed at 25% or 30%, this shields massive income from corporate tax liabilities.

2. GST Input Tax Credit: Commercial entities can offset the 12% GST charged on solar EPC contracts against their forward output GST liabilities, creating an immediate 12% cash savings.

Under KSERC regulations for non-domestic consumers exceeding 10 kW, systems operate under Net Billing (Gross or Net Feed-In). Energy generated is first used internally to offset instantaneous demand; any excess exported power is purchased by KSEB at the Commission-fixed feed-in tariff.

Because internal commercial tariffs (₹9 – ₹12) far exceed the feed-in tariff (~₹3.20), the ideal strategy engineered by GSR Energies is to size the solar array to match the facility’s daytime baseline load, achieving near 100% self-consumption for maximum economic return.