Bhilwara produces over 1.5 billion metres of synthetic fabric annually — more than 60% of India’s suiting and suitings output from a single district. The looms run three shifts, 365 days a year, consuming electricity at rates that make energy the second-largest input cost after raw fibre. At ₹9.50/unit on AVVNL’s HT-2 tariff, a mid-sized unit with 100 looms spends ₹60-80L on electricity each year.

Solar is dismantling this cost structure. But the path is not as simple as the marketing materials suggest.

Why Industrial Solar Makes Mathematical Sense at ₹9.50/unit

The industrial case for solar rests on a straightforward comparison between the cost of grid electricity and the levelised cost of solar energy (LCoE) over 25 years.

The Section 32 Accelerated Depreciation Advantage

For any business paying corporate income tax in India, solar qualifies for accelerated depreciation under Section 32 of the Income Tax Act. Unlike the 15% reducing balance rate for most plant and machinery, solar energy devices qualify for 40% Written Down Value (WDV) depreciation in Year 1.

What this means in practice for a ₹1.5 crore system:

• Year 1 depreciation claimable: 40% × ₹1.5Cr = ₹60L
• Tax saving at 30% corporate tax rate: ₹60L × 30% = ₹18L — in Year 1 alone
• Effective net cost of the system: ₹1.5Cr – ₹18L = ₹1.32Cr
• Revised payback: ₹1.32Cr ÷ ₹28.5L = 4.6 years even without considering Year 2+ depreciation
• With Year 2-6 continued WDV depreciation: effective payback closer to 3-3.5 years

This depreciation benefit is available only to CAPEX (self-owned) systems. It does not apply to PPA (Power Purchase Agreement) models where a third party owns the system.

CAPEX vs PPA: Which Is Right for Textile Units

CAPEX model: The factory owns the system. Full depreciation benefit. Capital tie-up of ₹1-2Cr. Best ROI. Requires in-house O&M capability or a strong AMC contract. Appropriate for units with tax liability and access to capital or solar loan facilities.

PPA model: A third-party developer installs the system on the factory roof and sells electricity at a contracted rate (typically ₹4.50-6.50/unit). Zero capital outlay. No depreciation benefit. No maintenance responsibility. But the effective saving is smaller — at ₹5/unit PPA vs ₹9.50/unit grid, saving is ₹4.50/unit vs ₹7.20/unit under CAPEX. Appropriate for capital-constrained units that prioritise cash flow over total ROI.

The breakeven analysis: For any Bhilwara textile unit with AVVNL HT-2 tariff above ₹7/unit and any tax liability, CAPEX outperforms PPA on a 25-year NPV basis in virtually every scenario modelled. The MSME solar loan facility from RRECL at subsidised rates (3% interest subvention) makes CAPEX accessible even without large cash reserves.

The Power Quality Problem No One Talks About

Textile looms — particularly rapier and water-jet weaving machines — are sensitive to voltage fluctuations. A 10% voltage dip during a weaving cycle can cause weft breaks, pattern defects, and production downtime that costs far more per hour than the electricity price.

Solar inverters with active reactive power compensation (Q-control) can actually improve power quality at the feeder connection point, reducing voltage fluctuations that DISCOMs fail to control. This is a hidden value of solar that Bhilwara manufacturers are beginning to recognise: solar doesn’t just save money — it buys power stability.

What We See on the Ground in Bhilwara

FGPS Solar has commissioned multiple industrial systems in the Bhilwara textile cluster. The consistent learnings:

• L-foot mounting on GI sheets is the only viable approach for tin-shed sheds — no penetration, no warranty void on the roofing sheet, and reversible if the landlord tenant arrangement changes.
• Shadow analysis is non-negotiable. Shed layouts with exhaust cowls, water tanks, and ridge vents create complex shadow patterns. PVSyst simulation with site-measured shadow data is essential; eyeballed estimates cost 10-15% in generation.
• DC cable sizing matters more than most installers admit. A 200 kW shed system with undersized DC cables (using 4mm² where 6mm² is correct) loses 3-4% in resistive losses — that’s ₹85,000/year in Bhilwara HT tariff terms.

A well-designed CAPEX solar system on a Bhilwara textile roof, claiming full Section 32 depreciation, typically achieves a post-tax IRR of 30-35%. This is not an alternative investment — it is a transformation of your largest variable cost into a depreciating fixed asset.