Commercial Rooftop Solar in Bangalore Pays for itself in 3–4 years.
Your building uses most of its power in daylight, exactly when solar produces it. An Eltron rooftop plant makes electricity for roughly ₹2–3 a unit over 25 years, against ₹9–12+ for commercial grid power.
- Net metering for systems up to 1 MW under KERC's 2026 rules
- 40% accelerated depreciation on the plant in year one
- Tier-1 TOPCon panels with a 30-year performance warranty
- BESCOM / GESCOM approvals, net meter and commissioning handled
- 5 years of free maintenance and remote monitoring
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From Eltron's installation records, September 2020 to October 2026.
Why rooftop solar pays off faster for commercial buildings in Bangalore
Commercial consumers pay some of the highest electricity rates in Karnataka and use most of their power during the day. That combination makes the business case simple.
Your load matches the sun
Offices, schools and shops draw most of their power between 9 am and 6 pm. Every solar unit used on site replaces your most expensive grid unit.
About ₹13,000 saved per kW a year
Each kW generates around 1,450 units a year in Bengaluru. At ₹9 a unit, that is roughly ₹13,000 off your bill, every year, for 25 years.
40% depreciation in year one
Solar plants qualify for 40% depreciation under the Income Tax rules, so a large part of the investment comes back as tax saved in the first year.
Net metering up to 1 MW
Karnataka's 2026 regulations extend net metering to all consumer categories up to 1,000 kW, so weekend and holiday surplus is credited against your bill.
A hedge against tariff hikes
BESCOM consumers pay an extra 56 paise per unit true-up charge through April 2027. Units your roof produces are not affected by tariff revisions.
Lower Scope 2 emissions
A 100 kW plant avoids roughly 100 tonnes of CO₂ a year, a measurable win for ESG reports, tenants and green-building goals.
Commercial solar cost in Bangalore: 25 kW to 500 kW
Indicative prices for a grid-connected plant on an RCC roof, including GST, installation, structure and BESCOM liaison. Larger plants cost less per kW.
| Plant size | Indicative cost (incl. GST) | Units / year | Savings / year at ₹9/unit | Simple payback | Shadow-free roof |
|---|---|---|---|---|---|
| 25 kW | ₹13 – 15 lakh | 36,000 | ₹3.3 lakh | ~4.3 years | 2,000 – 2,500 sq ft |
| 50 kW | ₹24 – 28 lakh | 72,500 | ₹6.5 lakh | ~4.0 years | 4,000 – 5,000 sq ft |
| 100 kW | ₹45 – 52 lakh | 1,45,000 | ₹13 lakh | ~3.7 years | 8,000 – 10,000 sq ft |
| 250 kW | ₹1.05 – 1.25 crore | 3,62,500 | ₹32.6 lakh | ~3.5 years | 20,000 – 25,000 sq ft |
| 500 kW | ₹2.0 – 2.4 crore | 7,25,000 | ₹65 lakh | ~3.4 years | 40,000 – 50,000 sq ft |
Indicative ranges based on recent Eltron quotations (November 2026). Generation assumes 1,450 units per kW per year. Payback is shown before the depreciation tax benefit, which shortens it further. Metal-sheet roofs, elevated structures and long cable runs change the price; your quote is fixed after a site survey.
How much can your building save with solar?
Enter your average monthly bill. We size the plant to cover your daytime consumption and show the numbers that matter to your finance team.
Estimates only, using 1,450 units/kW/year and Eltron's indicative pricing. *Assumes a 25.17% corporate tax rate and the plant in use for 180+ days in the financial year. Confirm tax treatment with your CA.
No subsidy for businesses. The tax benefits are better.
The PM Surya Ghar subsidy is only for homes and housing-society common areas. Commercial buildings get something more valuable at scale: 40% accelerated depreciation on the solar plant, plus a low effective GST rate.
If the plant is put to use for less than 180 days in the financial year it is commissioned, half the rate (20%) applies that year and the rest carries forward.
Read more: GST on solar panels in Karnataka
| Example: 100 kW plant | |
|---|---|
| Plant cost (incl. GST) | ₹48.5 lakh |
| Depreciation claimed in year 1 (40%) | ₹19.4 lakh |
| Tax saved at 25.17% | ≈ ₹4.9 lakh |
| Effective GST on the plant (70:30 rule) | ≈ 8.9% |
| Bill savings in year 1 | ≈ ₹13 lakh |
Illustrative. Your tax position depends on your entity and regime; confirm with your chartered accountant.
Solar for every type of commercial building
Offices & IT parks
Weekday loads from HVAC, lighting and servers track solar output closely, so most of the generation is used on site.
Hospitals & clinics
Round-the-clock loads and high bills. We add DG synchronisation so solar keeps running alongside your generator and cuts diesel use.
Schools & colleges
Large flat roofs and daytime use. Weekend and vacation surplus is credited through net metering.
Hotels & restaurants
Kitchens, laundry and air conditioning create a heavy daytime peak that solar trims directly.
Malls, showrooms & retail
Long trading hours and big roofs make retail one of the fastest paybacks we see.
Warehouses & cold storage
Metal-sheet roofs suit lightweight rail mounts. Running a factory? See industrial rooftop solar.
Commercial rooftop solar work by Eltron in Bengaluru
Real installations and real engineering drawings from our team. Every commercial proposal starts with a 3D layout of your roof, so you see the panel count, setbacks and structure before you sign anything.
Photos are from Eltron installations in and around Bengaluru (December 2025). Design images are 3D layouts our engineers prepare for every proposal; a design is not a completed project.
How we deliver your commercial solar project
One team from the first bill review to the net meter, with every step in writing.
Bill & load review
Share 12 months of bills. We map daytime, night and weekend consumption against your tariff.
Site survey & 3D shadow study
Roof structure, shading from tanks and neighbouring buildings, cable route and electrical room.
Proposal with real numbers
Plant size, yield, payback, depreciation and an itemised bill of materials, ready for your board.
BESCOM / GESCOM approvals
We file the application, follow technical feasibility and prepare the agreement documents.
Installation
GI structure, modules, inverters, earthing and protection. Typically 2–4 weeks on site, planned around your operations.
Net meter & handover
Inspection, grid synchronisation, monitoring login and a written maintenance schedule.
Built for 25+ years of generation
We specify equipment from manufacturers with a long track record and put every warranty in your proposal, so you know exactly who covers what.
- Solar modules: TOPCon or Mono PERC, 15-year product and 30-year performance warranty
- Inverters: three-phase string inverters with remote monitoring, 10-year warranty
- Structure: hot-dip galvanised steel, engineered for your roof and wind load
- Protection: DCDB, ACDB, surge protection, lightning arrestor and dedicated earthing
- Eltron O&M: 5 years free, with check-ups, online monitoring and warranty replacements (module cleaning and civil work excluded)
After year five: solar maintenance and AMC in Bangalore
Net metering for commercial consumers under KERC's 2026 regulations
KERC's Grid Interactive Distributed Solar PV Plants Regulations, 2026 replaced the 2016 rooftop rules and opened up options that matter for businesses.
- All consumer categories, including commercial, can opt for net metering
- Up to 1,000 kW per installation, subject to your sanctioned load or contract demand
- Virtual and group net metering now exist for organisations with more than one premises
- Net billing and gross metering remain available; we model which one suits your tariff
We confirm the current BESCOM or GESCOM procedure for your connection before quoting. Also see DCR vs non-DCR panels and rooftop solar requirements in Karnataka.
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
Commercial rooftop solar FAQs
How much does a 100 kW solar plant cost in Bangalore?
A 100 kW grid-connected rooftop plant on an RCC roof typically costs ₹45–52 lakh including GST, installation and BESCOM liaison. It generates around 1.45 lakh units a year. Metal-sheet roofs, elevated structures and long cable runs change the price, so the final figure comes after a site survey.
Is there a government subsidy for commercial rooftop solar in Karnataka?
No. The PM Surya Ghar subsidy covers homes and housing-society common areas only. Commercial buildings benefit instead from 40% accelerated depreciation, an effective GST of about 8.9% on the plant, and net metering for systems up to 1 MW.
What is the payback period for commercial solar?
At ₹9 a unit, most commercial plants in Bangalore pay back in about 3–4.5 years from bill savings alone. Higher tariffs and the depreciation tax benefit shorten this. The panels keep generating for 25 years or more.
How much roof space does a commercial solar plant need?
Plan for about 80–100 sq ft of shadow-free roof per kW. A 100 kW plant needs roughly 8,000–10,000 sq ft. Both RCC and metal-sheet roofs work; we confirm usable area after a 3D shadow study.
What is the net metering limit for commercial buildings in Karnataka?
Under KERC's 2026 Distributed Solar PV regulations, commercial consumers can use net metering for systems up to 1,000 kW (1 MW), subject to their sanctioned load or contract demand.
Can I install solar if my business rents the building?
Yes, with the building owner's written consent and a lease long enough to recover the investment. We help you put together the owner consent and BESCOM documents.
Will the solar plant work during power cuts or with our DG set?
A standard grid-connected plant switches off during an outage for safety. With a DG synchronisation controller, solar can run alongside your diesel generator and reduce fuel use. We include this where your site needs it.
How long does a commercial solar project take?
Typically 6–10 weeks from order to commissioning. Installation itself takes 2–4 weeks; the rest depends on BESCOM or GESCOM approval and net-meter availability.
Do you install commercial solar outside Bengaluru?
Yes. We have branches in Bengaluru, Ballari and Kalaburagi, and take up commercial projects across Karnataka in both BESCOM and GESCOM areas.
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