Coal CPP-to-Renewable Transition for Indian Aluminium Smelters | Reclimatize.in
India’s primary aluminium smelters run on captive coal power plants that produce 13-19 tCO₂ per tonne of aluminium — 80% of which comes from electricity. Captive solar and wind now cost Rs 4-4.5/kWh all-in, versus Rs 6/kWh for coal CPP. But the cost saving alone understates the investment case. When CCTS Scope 2 GEI reduction, CBAM Scope 2 certificate savings on EU exports, and RCO compliance value are combined with the direct electricity cost saving, a smelter shifting 1 MWh from coal CPP to captive RE earns approximately Rs 6.56/kWh in combined returns — more than the electricity itself costs. A 500 MW captive solar plant generates approximately Rs 574 crore per year in combined returns on a capex of Rs 2,000-2,500 crore — a payback of 3.5 to 4.5 years. This is not an ESG commitment. It is the highest-returning single capital investment available to an Indian aluminium smelter in 2026. This article builds the unified investment model, maps where each rupee of return comes from, and explains the timing logic that makes 2026-2027 the window that matters.
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