Industrial Rooftop Solar for Factories in Bangalore. Engineered for production.
Turn idle factory and warehouse roofs into your lowest-cost source of power. Eltron designs, builds and maintains rooftop plants from 100 kW to 1 MW+ for metal-sheet sheds, multi-shift loads and HT connections, turnkey.
Size a plant for your factory
Share a few details. Our engineer reviews your bills and roof, then sends a sized proposal with payback and depreciation numbers.
Why manufacturers in Karnataka are moving to rooftop solar
Power is one of a factory's largest variable costs. A rooftop plant fixes a large share of it for 25 years, on a roof you already own.
saved per kW installed, every year, at ₹8 a unit
accelerated depreciation on the plant in year one
of generation from a single investment
CO₂ avoided per MW per year for your Scope 2 reporting
How much does a 1 MW solar plant cost in Karnataka?
A 1 MW grid-connected rooftop solar plant typically costs ₹3.7–4.4 crore including GST, installation, structure and DISCOM approvals. The final figure depends on module technology (TOPCon or Mono PERC), roof type, structure height and cable distances.
On a factory roof, that plant generates around 14.5 lakh units a year. At an industrial tariff of ₹8 a unit, it saves roughly ₹1.16 crore annually and pays back in about 3.5 years, before the depreciation benefit.
- 70,000–90,000 sq ftshadow-free roof needed
- 14.5 lakh unitsgeneration per year
- ≈ ₹1.16 Crannual savings at ₹8/unit
- ~3.5 yearssimple payback
Industrial solar cost in Bangalore: 100 kW to 1 MW
Indicative prices for grid-connected plants on metal-sheet or RCC factory roofs, including GST, installation, structure and BESCOM liaison.
| Plant size | Indicative cost (incl. GST) | Units / year | Savings / year at ₹8 | Simple payback | Roof area |
|---|---|---|---|---|---|
| 100 kW | ₹42 – 50 lakh | 1,45,000 | ₹11.6 lakh | ~4.0 years | 7,000 – 9,000 sq ft |
| 250 kW | ₹1.0 – 1.2 crore | 3,62,500 | ₹29 lakh | ~3.8 years | 18,000 – 22,000 sq ft |
| 500 kW | ₹1.9 – 2.3 crore | 7,25,000 | ₹58 lakh | ~3.6 years | 35,000 – 45,000 sq ft |
| 1 MW | ₹3.7 – 4.4 crore | 14,50,000 | ₹1.16 crore | ~3.5 years | 70,000 – 90,000 sq ft |
Based on recent Eltron quotations, November 2026. Generation assumes 1,450 units per kW per year. Payback is before the 40% depreciation benefit. Your price is fixed after a site survey.
Calculate your factory's solar savings
Enter your monthly bill and shift pattern. We size the plant to your daytime consumption, capped at the 1 MW net-metering limit.
Estimates only: 1,450 units/kW/year and Eltron indicative pricing. *25.17% corporate tax rate, plant in use 180+ days in the financial year. Confirm tax treatment with your CA.
Engineered for industrial roofs and loads
A factory roof is not a house roof. Every Eltron industrial plant starts with a structural and electrical study, not a price list.
Structural assessment
Panels and mounting add roughly 12–15 kg/m². We check purlins, roof-sheet age and wind loads before design, and flag sheets that should be replaced before installation.
Right mounting for every roof
Mini-rail on trapezoidal sheets, non-penetrative clamps on standing-seam roofs, and hot-dip galvanised elevated structures on RCC, all sealed against leaks.
HT / LT electrical integration
Inverters, protection and metering are planned around your sanctioned load or contract demand, with DG synchronisation and zero-export control where your site needs them.
Safety built in
Walkways, lifeline points and clear fire-access paths are part of the layout, so your maintenance team and inspectors can move safely across the roof.
Industrial rooftop solar work by Eltron
Real installations on metal-sheet roofs, and the 3D plant layouts our engineers prepare before any steel or module is ordered. You see the exact panel count, setbacks and string layout for your roof in the proposal.
Photos are from Eltron installations in Karnataka. Design images are 3D layouts our engineers prepare for every proposal; a design is not a completed project.
See every unit your roof produces
Each plant ships with remote monitoring, so your plant head and finance team can track generation, savings and faults from a phone, without a site visit.
- Live generation and savings per inverter and string
- Fault alerts so issues are fixed before output drops
- 5 years of free O&M: check-ups, monitoring and warranty replacements
- Cleaning and AMC plans available after year five
Solar for every kind of factory
From Peenya and Bommasandra to Ballari's garment units and Kalaburagi's mills.
Engineering & auto parts
CNC, press and fabrication loads that peak in daytime shifts.
Textiles & garments
Large sheds, steady machine loads and strong export ESG demands.
Food processing & cold chain
Refrigeration loads run all day; solar cuts the costliest hours.
Pharma & chemicals
Clean-room HVAC and process loads with high power quality needs.
Plastics & packaging
Moulding and extrusion lines with heavy, predictable consumption.
Warehouses & logistics
Vast roofs, modest loads: ideal for net metering and future EV charging.
Rice & flour mills
Daytime milling loads matched closely by solar output.
Electronics & assembly
Sensitive equipment, clean power and green-supply-chain targets.
From feasibility to commissioning in 8–12 weeks
One accountable team, a fixed scope and a written schedule planned around your production.
Feasibility study
12 months of bills, load profile, roof survey and 3D shadow study.
Engineered proposal
Size, yield, payback, depreciation and an itemised bill of materials.
Approvals & procurement
BESCOM / GESCOM application, feasibility and equipment ordering.
Installation
Structure, modules, inverters and protection, typically 3–6 weeks on site.
Commissioning
Inspection, net meter, synchronisation, monitoring handover.
No subsidy for industry. Better: 40% depreciation.
Central rooftop subsidies cover homes and housing societies only. Industrial buyers instead claim 40% accelerated depreciation on the plant, pay an effective GST of about 8.9% under the 70:30 rule, and own an asset that keeps paying for 25 years.
If the plant is in use for less than 180 days in its first financial year, half the rate (20%) applies that year and the balance carries forward.
Related: GST on solar panels in Karnataka
| Example: 500 kW plant | |
|---|---|
| Investment (incl. GST) | ₹2.1 crore |
| Year-1 depreciation (40%) | ₹84 lakh |
| Tax saved at 25.17% | ≈ ₹21 lakh |
| Year-1 bill savings at ₹8/unit | ≈ ₹58 lakh |
| Effective GST on the plant | ≈ 8.9% |
Illustrative. Confirm tax treatment for your entity with your chartered accountant.
What KERC's 2026 rules mean for your factory
KERC's Grid Interactive Distributed Solar PV Plants Regulations, 2026 replaced the 2016 rooftop rules and widened the options for industrial consumers.
- Net metering for all consumer categories, including industrial
- Up to 1,000 kW per installation, subject to sanctioned load or contract demand
- Virtual and group net metering for companies with several plants or premises
- Net billing and gross metering options; we model which works best for your tariff
We confirm the current BESCOM or GESCOM procedure for your connection before quoting. See also DCR vs non-DCR panels and rooftop solar requirements in Karnataka.
Built to generate for 25 years and more
Module performance
TOPCon or Mono PERC modules with a 30-year performance warranty.
Module product
Manufacturer warranty against defects on every panel.
Inverter
Three-phase string inverters with remote monitoring.
Free O&M
Check-ups, monitoring and warranty replacements by Eltron. Cleaning and civil work excluded.
What Eltron customers say on Google
★★★★★“We recently completed a 65 kW solar power installation for our apartment complex with Eltron Energies, and the experience was outstanding from start to finish… The project was completed on time, and the energy savings have already started kicking in.”
★★★★★“I am very much pleased and happy about the service and the quality of M/s Eltron Energy Private Limited who installed Solar Panel on my roof top. The quality of the panels, fabrications, Inverter etc are upto the mark. Even after sales service is also excellent.”
★★★★★“The entire process was Good and hassle-free, with their team providing excellent guidance and support throughout. The system is performing efficiently, and the cost was very reasonable compared to other options in the market.”
★★★★★“We installed a 5 kW solar on-grid setup. Our electricity bill has become zero. Sometimes in winter, the electricity bill even goes negative, because BESCOM refunds us money.”
Quoted word for word from public Google reviews of Eltron Energy Private Limited (some trimmed, marked …). The 4.5 rating includes every review, good and bad.
Organisations that have worked with Eltron
Industrial rooftop solar FAQs
How much does a 1 MW rooftop solar plant cost in Karnataka?
A 1 MW grid-connected rooftop solar plant typically costs ₹3.7–4.4 crore including GST, installation, structure and approvals. It generates about 14.5 lakh units a year and needs 70,000–90,000 sq ft of shadow-free roof.
What is the payback period for industrial rooftop solar?
At an industrial tariff of ₹8 a unit, most plants from 100 kW to 1 MW pay back in about 3.5–4 years from bill savings alone. The 40% depreciation benefit shortens this further.
Can my factory's metal-sheet roof carry solar panels?
Usually, yes. Panels and mounting add roughly 12–15 kg/m². We check the purlins, roof-sheet condition and wind loads, use mini-rail or non-penetrative clamps, and advise replacing sheets that are near the end of their life before installation.
Is there a subsidy for industrial rooftop solar?
No. Central rooftop subsidies apply to homes and housing societies only. Industries benefit from 40% accelerated depreciation, an effective GST of about 8.9% on the plant, and net metering up to 1 MW.
What if my factory needs more than 1 MW?
Net metering is capped at 1,000 kW per installation under KERC's 2026 regulations. Beyond that we model net billing, gross metering, separate connections, or group and virtual net metering across your premises.
We run three shifts. Is solar still worth it?
Yes. A 24×7 plant uses every solar unit on site, so each one replaces a full-price grid unit. Solar covers your daytime share, and the payback stays attractive.
Will solar work alongside our diesel generators?
Yes. A DG synchronisation controller lets solar run with your generators during outages, cutting diesel consumption without reverse-feeding the DG.
How long does an industrial solar project take?
Typically 8–12 weeks from order to commissioning for 100 kW to 1 MW. On-site installation takes 3–6 weeks and is planned around your production schedule.
Which industrial areas do you cover?
All of Karnataka, including Peenya, Bommasandra, Jigani, Doddaballapur, Hoskote and Nelamangala around Bengaluru, plus Ballari and Kalaburagi through our branches in GESCOM areas.
Send 12 months of bills. Get an engineered proposal.
Free feasibility study, structural check and 3D shadow analysis for your factory. No obligation.