Why Renewable Energy Is No Longer Expensive for Industries

The belief that "renewable energy is too expensive for industries" was reasonable in 2012. In 2025, it is simply incorrect — and for industries still operating on this assumption, the financial cost of inaction is growing every year.

Let's address the myths directly.

The Real Numbers

Let's compare actual effective per-unit costs for a large South Indian manufacturer:

• KSEB HT tariff (current): ₹8.5–9.5/unit (energy) + demand charges + surcharges
• Effective all-inclusive grid cost: ₹10–12/unit for most manufacturers
• Group captive wind power: ₹4.5–5.5/unit (all-inclusive)
• Open access renewable: ₹5.0–6.5/unit (all-inclusive)
• CAPEX rooftop solar (levelized): ₹3.5–4.5/unit over plant life

Why the Cost Has Fallen So Dramatically

• Solar panel costs have fallen 90%+ since 2010 — from $3/W to below $0.20/W
• Wind turbine costs have fallen 50%+ with larger, more efficient machines
• Battery storage (BESS) costs have fallen 85% since 2015
• Project financing for renewable is now cheaper than for thermal power
• India has built one of the world's largest renewable supply chains — reducing import dependency

What "Expensive" Actually Means Now

The only way renewable energy is "expensive" today is if you're comparing it to:

• Subsidised agricultural tariffs (not applicable to industry)
• Heavily discounted legacy industrial tariffs (which are being phased out)
• Short-term grid procurement without long-term tariff escalation risk factored in

When you compare renewable energy cost against the 15-year trajectory of grid tariffs — accounting for annual escalation — renewable is not just cheaper now, it gets significantly cheaper relative to grid power over time.

Industries That Have Already Moved

Across South India, the industries that made renewable transitions 5–7 years ago are now reaping the full benefits — operating at ₹3–4/unit effective cost while their competitors pay ₹9–11/unit from the grid. The competitive advantage from energy savings is increasingly visible in operating margins.