Solar for Ludhiana Knitwear Cluster: Costs, Tariffs & ROI

Ludhiana is India’s knitwear capital in the north. The cluster runs roughly 14,000 hosiery and knitwear units with an annual turnover of about ₹15,000 crore, producing close to 80% of the woollen garments sold in India (industry association data, 2020). Every knitting machine, compressor, dyeing boiler, and humidification plant in Focal Point, Bahadurke Road, and the Dhandari industrial belt runs on PSPCL power, and even after the FY 2026-27 tariff cut, large-supply industrial consumers pay ₹6.5 to ₹8 per kVAh all-in. Solar power for the Ludhiana knitwear cluster is no longer an experiment: it is the cheapest electricity these factories can buy, at roughly ₹2.5 to ₹3 per kWh levelised over 25 years.

Direct answer. A Ludhiana knitwear factory paying PSPCL HT industrial tariffs of ₹6.5-₹8 per kVAh can cut daytime energy cost by 50-60% with rooftop solar. A 200 kW system costs about ₹70-₹75 lakh installed and pays back in 3-4 years with accelerated depreciation under the Income Tax Act. Heaven Green Energy recommends sizing to 80-85% of daytime load, using Punjab’s net metering rules, and claims PSERC-credited export at ₹2.97 per kWh for surplus.

This guide covers the PSPCL tariff structure, Punjab’s net metering rules, real factory load profiles, CAPEX vs OPEX math, and the sizing framework we use for textile clusters. For the pan-India picture, start with our solar for textile industry guide; this post focuses on what is different in Punjab.

Why Ludhiana’s Knitwear Cluster Is Built for Rooftop Solar

The knitwear value chain in Ludhiana splits into two load profiles, and both sit neatly inside the solar generation window:

Knitting, stitching, and finishing units. Flat knitting machines, circular knitters, linking and stitching lines, steam irons, compressors, and lighting. Energy intensity runs 60-150 kWh per 100 kg of finished garment. Production is predominantly single or double shift, 8 AM to 8 PM. A typical mid-sized unit carries 100-300 kW connected load on an LT or small HT connection.

Dyeing and processing houses. Soft-flow dyeing machines, boilers, hydro extractors, dryers, effluent treatment pumps. Energy intensity jumps to 300-500 kWh per tonne of fabric processed, because hot water and steam dominate. These units run longer hours and carry 250-500 kW connected loads, often on 11 kV HT.

Three structural factors make the cluster unusually solar-friendly:

1. Daytime-heavy load. Even 24/7 dyeing houses draw 55-65% of their daily energy between 8 AM and 6 PM, which is the solar window.
2. Large shed roofs. Focal Point sheds typically offer 1,500-4,000 m² of usable metal-sheet roof, enough for 150-400 kW.
3. Assessed cluster potential. A technical assessment of the Ludhiana knitted apparel cluster put total rooftop solar potential at roughly 570 MWp, with proportionate annual monetary savings for units that adopt it (indianclusters.org study).

Owners on X complain less about the tariff itself and more about outages and diesel spend during cuts. Rooftop solar with grid-tie plus DG synchronisation directly attacks that second problem: fewer DG run hours means ₹18-₹22 per kWh diesel generation replaced by near-zero marginal cost solar.

PSPCL Tariffs in FY 2026-27: What Solar Actually Replaces

Punjab’s regulator, the Punjab State Electricity Regulatory Commission (PSERC), cut tariffs across domestic, commercial, and industrial categories for FY 2026-27, effective April 1, 2026. Industrial consumers saw reductions of up to ₹0.74 per unit, and large-supply energy charges moved down across slabs (Mercom India, March 2026). A cut is welcome, but the all-in rate for an HT industrial consumer still lands near ₹6.5 to ₹8 per kVAh once fixed charges, electricity duty, and fuel cost adjustment are added.

Two nuances matter for the business case:

The night tariff changes your shift economics. PSERC continued the special night scheme: 50% off fixed charges and ₹5.50 per kVAh energy charges for consumption between 10 PM and 6 AM (Indian Express, March 2026). If your unit can shift boiler heating or dyeing batches to night, do that first, and size solar only against the remaining daytime load.

Every solar unit you self-consume is worth ₹6.5-₹8; every exported unit earns only ₹2.97. That 2.2-2.7× spread is why sizing discipline matters more in Punjab than almost anywhere else. Oversizing a system and dumping surplus into the grid at the feed-in rate destroys the payback. We cover the sizing rule in the framework section below.

Punjab Solar Policy, Net Metering, and the 2026 PSERC Draft Amendment

Punjab’s rooftop solar framework sits under PSERC’s grid-interactive rooftop solar regulations, administered by PSPCL as the DISCOM (distribution company). The practical mechanics for an industrial consumer:

1. Apply to PSPCL for a grid-connected rooftop system with your consumer number, sanctioned load, and site plan.
2. Feasibility and technical clearance from the local PSPCL division, typically 2-4 weeks for systems under contract demand.
3. Install through an empanelled EPC with ALMM-listed modules and BIS-certified inverters.
4. Commission and replace the meter with a bidirectional net meter; export is set off against import at the applicable retail tariff, with surplus settled at the feed-in rate of ₹2.97 per kWh for FY 2026-27.

The bigger news is the draft third amendment PSERC issued in January 2026, which proposes group net metering, virtual net metering, and behind-the-meter configurations across Punjab (Legality Simplified, January 2026). For a knitwear exporter with three sheds on separate PSPCL connections, group net metering would let one larger solar plant offset all three bills. Treat this as pending until the final notification, but design new systems so they can be converted later.

For the step-by-step application flow across states, see the state-by-state DISCOM net metering guide from our engineering sister team, and our own net metering explainer.

Sizing Solar for a Knitwear Factory: The Knitwear Load-Map Method

Generic sizing rules fail in Ludhiana because the night tariff and the weak export rate pull in opposite directions. We use a three-step framework we call The Heaven Green Knitwear Load-Map Method:

Step 1, Map the shift pattern. Pull 12 months of PSPCL bills and split consumption into three buckets: solar window (8 AM-6 PM), evening (6 PM-10 PM), and night (10 PM-6 AM). If night consumption is above 35% of the total and your process allows batch shifting, shift it to the ₹5.50 night tariff before sizing solar.

Step 2, Match load to roof and yield. In Ludhiana’s climate, 1 kWp of rooftop solar generates about 1,400-1,500 kWh per year, lower than Gujarat’s 1,550-1,700 because of winter fog and higher soiling from industrial dust. Budget 9-10 m² of shed roof per kWp with 545 Wp TOPCon modules.

Step 3, Cap at 80-85% daytime self-consumption. Size so annual generation equals 80-85% of your solar-window consumption. Because exported energy earns only ₹2.97 per kWh, going past 85% stretches payback by 1-2 years. The remaining 15-20% import is your fog-season and maintenance-day margin.

Worked example, 200 kVA dyeing-cum-knitting unit in Focal Point:

• Annual consumption: 5.2 lakh kWh
• Solar-window share after night shifting: 60% = 3.12 lakh kWh
• 82% self-consumption target: 2.56 lakh kWh
• System size at 1,450 kWh/kWp: about 175 kWp (round to 180 kWp on 1,700 m² of roof)
• First-year savings: 2.56 lakh kWh × ₹7.25 ≈ ₹18.6 lakh, plus a small export credit

Compare this with the sizing logic we applied in the Tirupur garment cluster guide, where a stronger net metering regime allows slightly larger systems.

What a 100-500 kW System Costs in Punjab (2026)

Installed EPC (engineering, procurement, construction) costs in Punjab track the national benchmark: ₹33,000-₹38,000 per kWp for systems above 100 kW, per MNRE benchmark cost guidance for 2025-26 (MNRE). Logistics to Ludhiana add little; structure condition is the usual swing factor.

Component	Cost per kWp	200 kWp total
Modules (545 Wp TOPCon, ALMM listed)	₹18,000	₹36,00,000
String inverters (3-phase, BIS/IEC 62109)	₹5,500	₹11,00,000
Mounting structure for GI sheet shed	₹4,000	₹8,00,000
Cables, earthing, lightning protection	₹2,500	₹5,00,000
ACDB/DCDB and protection panels	₹1,200	₹2,40,000
Civil works and roof penetration sealing	₹1,500	₹3,00,000
Installation and commissioning labour	₹2,000	₹4,00,000
PSPCL approvals, net meter, liaison	₹800	₹1,60,000
Total installed	₹35,500/kWp	₹71,00,000

Two Ludhiana-specific cost notes. First, many Focal Point sheds are 25-40 years old with asbestos-cement sheets; a structural audit and possible purlin strengthening adds ₹3-₹8 lakh on a 200 kWp job. Second, winter fog cuts December-January generation by 15-25%, which is already baked into the 1,400-1,500 kWh/kWp yield figure, so do not let a vendor quote Gujarat yields for a Punjab roof. Our solar panel cost breakdown goes component by component, and the BIS and IEC compliance guide for inverters explains which certificates PSPCL inspectors actually check.

Get a free site assessment. Our engineers visit your Ludhiana unit within 48 hours and send a custom savings proposal with AD and GST math in 5 working days, no cost, no obligation. Get your free quote →

ROI: Payback, Accelerated Depreciation, and GST

The financial case stacks three benefits on top of bill savings.

Accelerated depreciation. Solar plants qualify as renewable energy plant and machinery under Section 32 of the Income Tax Act, with 40% written down in Year 1. On a ₹71 lakh system at a 25% corporate tax rate, that is roughly ₹7.1 lakh of Year 1 tax saving. Our detailed accelerated depreciation solar guide shows the depreciation schedule year by year.

GST input tax credit. A GST-registered factory pays 12% GST on a works-contract solar supply but claims it back as input credit against output GST, so the effective tax cost is near zero for most exporters. See GST on solar systems for the invoicing structure.

Demand charge relief. Daytime solar clips your maximum demand recorded by the PSPCL meter; some units can renegotiate contract demand downward after 6-12 months of metered data, trimming fixed charges.

5-year model, 180 kWp system at ₹7.25/kVAh blended day rate:

Year	Generation (kWh)	Bill saving	AD tax benefit	Net cash flow
Year 1	2,61,000	₹18.9 lakh	₹7.1 lakh	₹26.0 lakh
Year 2	2,59,800	₹19.8 lakh	Nil	₹19.8 lakh
Year 3	2,58,600	₹20.8 lakh	Nil	₹20.8 lakh
Year 4	2,57,500	₹21.8 lakh	Nil	₹21.8 lakh
Year 5	2,56,300	₹22.9 lakh	Nil	₹22.9 lakh
Cumulative		₹1.04 crore	₹7.1 lakh	₹1.11 crore

Against a ₹64 lakh outlay (₹71 lakh minus GST credit and AD benefit), payback lands between years 3 and 4. Assumptions: 5% annual tariff escalation, 0.45% annual degradation, 1,450 kWh/kWp yield. Over 25 years the system returns roughly 9-12× its net cost. Treat this as a worked example, not a quote; your bill data decides the real numbers. Our industrial solar installation guide covers the execution side.

CAPEX vs OPEX: Which Model Fits a Ludhiana Knitwear Unit?

Most Ludhiana units we survey are family-run companies weighing a ₹60-₹80 lakh capital decision against an OPEX (operating expense) power purchase agreement where a developer owns the plant and sells you solar units at a discount.

Dimension	CAPEX (you own it)	OPEX / RESCO (developer owns it)
Upfront cost	₹60-75 lakh for 180 kWp	Zero or token deposit
Effective solar cost	₹2.5-3/kWh over 25 yrs	₹4-5/kWh PPA rate
AD + GST benefits	Yours	Developer’s
Payback	3-4 years	Immediate bill saving, smaller per unit
Balance sheet	Asset + optional term loan	Off balance sheet, 15-25 yr PPA lock-in
Best for	Profitable, tax-paying units with roof ownership	Leased sheds, thin margins, capital reserved for machinery

For a tax-paying unit with its own shed, CAPEX wins clearly: the AD and GST stack is worth 20-25% of project cost, and Punjab’s steep spread between retail and export rates rewards owners who maximise self-consumption. OPEX makes sense when the shed is leased, when working capital is committed to yarn inventory, or when the unit lacks taxable profit to absorb AD. The tradeoffs mirror what we documented in our OPEX vs CAPEX textile analysis, with definitions in the OPEX model and CAPEX model glossary entries.

Verdict. Own the plant if you pay corporate tax and own your roof; the tax stack makes Punjab CAPEX solar one of the best industrial investments available in 2026. Choose OPEX only when capital or roof tenure genuinely blocks ownership, and cap the PPA escalator at 2-3%.

Five Mistakes Ludhiana Factories Make with Solar

1. 1
   Sizing on total consumption instead of daytime consumption. A unit that runs 40% of load at night and sizes solar to 100% of the bill ends up exporting a third of its generation at ₹2.97 per kWh. Map shifts first, size second.
2. 2
   Accepting Gujarat yield numbers. Vendors quoting 1,650 kWh/kWp for a Ludhiana roof overstate first-year savings by 12-15%. Insist on a PVSyst simulation with Ludhiana weather files and fog losses.
3. 3
   Skipping the structural audit on old sheds. AC sheet roofs on aging trusses cannot always take a panel array plus Punjab wind loads. Replacement or strengthening is cheaper than a collapsed bay.
4. 4
   Forgetting DG synchronisation. Ludhiana factories run diesel gensets during PSPCL outages. Without a DG-sync controller, the solar plant trips during grid failure and your savings stop exactly when power is most expensive.
5. 5
   Not planning for the 2026 net metering amendment. If group or virtual net metering is notified, a rigid single-connection design may need rework. Ask your EPC to keep the electrical design convertible.

Is Solar Worth It for a Ludhiana Knitwear Unit?

Our honest take: if your unit owns its shed, pays corporate tax, and runs at least one day shift, rooftop solar in Ludhiana is close to a guaranteed win in 2026. The exception is a unit running mostly night batches on the ₹5.50 night tariff with no room to shift load; there, solar still works but the payback stretches toward 5 years and a smaller, daytime-only system is the right answer.

How Heaven Green Energy Helps

Heaven Green Energy is an MNRE-approved solar EPC with 10,000+ installations across 25+ cities, including industrial clusters in Gujarat, Tamil Nadu, and Punjab. For knitwear and hosiery factories we run the full chain: bill-data load mapping with the Knitwear Load-Map Method, structural audit of aging sheds, DG-sync design, PSPCL net metering paperwork, AD and GST modelling with your chartered accountant, a P90 generation guarantee in the EPC contract, and a 5-year AMC.

• Industrial Solar EPC: 100 kW to 5 MW turnkey projects with performance guarantees.
• Commercial Solar: 10-100 kW systems for smaller knitting and trading units.
• Solar Calculator: estimate your savings and payback in 60 seconds.
• Solar financing options explained: term loans, NBFC lines, and OPEX structures compared.

Frequently Asked Questions

What is the PSPCL industrial tariff for factories in Ludhiana in 2026?

For FY 2026-27, PSERC cut industrial tariffs by up to ₹0.74 per unit, but large-supply HT consumers still pay roughly ₹6.5 to ₹8 per kVAh all-in after fixed charges, electricity duty, and surcharges. A special night scheme offers ₹5.50 per kVAh energy charges plus 50% off fixed charges for consumption between 10 PM and 6 AM. Daytime rooftop solar at ₹2.5-₹3 per kWh undercuts the day rate by 50-60%.

How much solar can a typical Ludhiana knitwear factory install?

Most mid-sized units install 100-300 kWp, limited by shed roof area at 9-10 m² per kWp and by the 80-85% daytime self-consumption rule. Larger dyeing houses with 3,000-4,000 m² roofs reach 400-500 kWp. A technical assessment of the Ludhiana knitted apparel cluster estimated total rooftop potential at about 570 MWp across the cluster, so roof availability is rarely the binding constraint.

Is net metering available for industrial consumers in Punjab?

Yes. PSPCL offers grid-connected rooftop net metering to industrial consumers under PSERC’s rooftop solar regulations. Exported energy is first set off against imports at the retail tariff; surplus beyond that is settled at the feed-in rate of ₹2.97 per kWh for FY 2026-27. A draft third amendment notified in January 2026 proposes group net metering, virtual net metering, and behind-the-meter options, which would help multi-shed factory owners.

What is the payback period for solar at a Ludhiana hosiery unit?

For a CAPEX system, payback is typically 3 to 4 years. A 180 kWp system costing about ₹71 lakh gross nets down to roughly ₹64 lakh after GST input credit and the Year 1 accelerated depreciation benefit, and saves ₹19-23 lakh per year at current PSPCL tariffs. Under an OPEX or RESCO model, savings start immediately with zero upfront cost, but the per-unit benefit is smaller because the developer keeps the tax benefits.

Does solar work in Ludhiana’s winter fog?

Yes, with adjusted expectations. December and January fog reduces generation by 15-25% compared to clear-sky months, which is why honest Punjab yield estimates use 1,400-1,500 kWh per kWp per year rather than Gujarat’s 1,600+. The remaining 10 months generate strongly, and the annual economics still support 3-4 year paybacks. Any vendor quoting Gujarat yields for Ludhiana is inflating your savings projection.

Can solar run my factory during PSPCL power cuts?

A standard on-grid system shuts down during a grid outage for safety. With a DG-sync controller, the solar plant keeps generating alongside your diesel genset during cuts, cutting diesel consumption 40-70% in daylight hours. Full outage-independent operation needs a hybrid system with batteries, which adds ₹8-12 lakh per 100 kWh of storage and only pencils out for units with very high outage losses.

Does accelerated depreciation apply to solar in Punjab?

Yes, accelerated depreciation is a central Income Tax Act benefit, not a state scheme, so Punjab factories get the same 40% Year 1 write-down as anywhere in India. On a ₹71 lakh system at a 25% corporate tax rate, that is about ₹7.1 lakh of Year 1 tax saving. Your CA should book the plant under renewable energy plant and machinery in the fixed asset register.

Should a leased-shed knitwear unit choose CAPEX or OPEX solar?

Leased sheds usually point to OPEX. Without roof ownership, a CAPEX plant carries relocation risk, and most OPEX developers handle the landlord agreement as part of the PPA. You give up the AD and GST benefits, which is the real cost, but you keep working capital free for yarn and machinery. If your lease has 15+ years of certainty, CAPEX still wins on lifetime savings.