Solar EPC Company in Chennai for Commercial and Industrial Projects
Blues Renewables is a solar EPC contractor in Chennai delivering rooftop and ground-mount projects for factories, warehouses, institutions and commercial premises. Single-point responsibility from energy audit and design through procurement, construction, approvals and commissioning, with up to 40% accelerated depreciation in year one and payback typically inside three to four years.
Energy audit before design
In-house installation, not subcontracted
CAPEX or OPEX
Installing in Chennai since 2020
The case
Why solar pays back faster for a business
Commercial rooftop solar in Chennai typically pays back in three to four years against four to six for a home, despite businesses receiving no government subsidy. Three factors drive it: commercial tariffs are considerably higher than domestic ones, business consumption is concentrated in daylight hours when the system generates, and accelerated depreciation of up to 40% delivers a tax benefit in the first year.
Depreciation benefit depends on your tax position and profitability. Your accountant should model it — we provide the asset value, classification and invoice split needed to do so.
Full scope
What an EPC contractor delivers
EPC means engineering, procurement and construction under one contract, with one party answerable for all three. Here is the scope in full, so you can compare it line by line against any other quote you are holding.
STAGE 01
Engineering
STAGE 02
Procurement
STAGE 03
Construction
STAGE 04
Approvals
STAGE 05
Handover
AFTER HANDOVER · ONGOING
The part most EPC contracts stop at
EPC contractor, dealer or installer, and why the distinction matters
Chennai has many companies selling solar, and the word on the quote does not always describe the same thing. A dealer sells equipment. An installer mounts it. An EPC contractor is contractually answerable for the whole system — the engineering, the procurement, the construction, and the performance that follows from all three.
The practical test is where the design work happens. If the structural design comes from the structure supplier, the electrical design from the inverter brand's template and the layout from whoever turns up on site, no single party owns the outcome. Ask who produces the drawings, who signs them, and who is contractually answerable if generation falls short.
Who this is for
Commercial and industrial segments we work with
Manufacturing and MSME units
Ambattur, Sriperumbudur, Oragadam, Gummidipoondi, Thirumazhisai, Maraimalai Nagar and the SIPCOT parks. Metal sheet roofs over large spans, daytime shift patterns and high connected loads make these among the best solar sites in the region.
Warehouses and logistics
Large, unobstructed roof area along the GST Road and Chennai–Bengaluru corridors. Often modest electrical load relative to roof size, which makes correct sizing more important here than anywhere else.
Schools, colleges and institutions
Daytime load matching generation almost exactly, and large flat roof areas. Long holiday periods reduce annual self-consumption, so sizing needs to account for the academic calendar rather than term-time load alone.
Hospitals, clinics and diagnostic centres
Continuous load, high air conditioning and equipment consumption, and a strong case for hybrid systems where critical equipment cannot tolerate interruption.
Hotels, restaurants and retail
High air conditioning, refrigeration and lighting loads. Retail and hospitality often run substantial evening consumption, which changes the self-consumption calculation and should be modelled rather than assumed.
Offices and IT premises
OMR, Perungudi, Thoraipakkam, Guindy and Nungambakkam. Consumption sits squarely in office hours, which is close to an ideal match for rooftop generation.
Cold storage and processing
Among the strongest cases in the region, with continuous high load and consumption that peaks in exactly the hot conditions when generation is highest.
Housing societies
Common-area systems are governed differently and claim a subsidy businesses cannot. See housing societies and common areas.
Ownership models
CAPEX or OPEX, and which suits your balance sheet
There are two ways to put solar on a commercial roof. Buy the system and own the asset, or host a developer's system and buy the units from it under a power purchase agreement. The right answer depends less on the roof than on your tax position and how you want the cost to sit on your books.
What to check in any PPA before signing
A PPA is a 15 to 25 year contract on your roof. It deserves the same legal review as a lease, and we would rather you took it to a lawyer than signed it quickly.
01
The escalation clause
A rate rising 3% a year for 20 years is a very different deal from a flat one.
02
Minimum offtake obligations
What happens if your consumption falls?
03
Performance guarantees
And what happens if generation underperforms.
04
End-of-term terms
Transfer price, removal obligation, extension rights.
05
Exit terms
If you sell the premises or the business.
Beyond the bill
Green audit, carbon credits and supplier requirements
For Chennai businesses supplying export markets or large corporate customers, rooftop solar increasingly serves a compliance purpose as well as a financial one. Green audit certification and documented renewable energy use are being requested by buyers running supplier sustainability programmes, and verified emissions reductions can in some cases generate carbon credits.
Green audit certification
Increasingly requested in tender documents and supplier onboarding, particularly by European and North American buyers.
Supplier sustainability requirements
Chennai's automotive, textile, leather and electronics exporters are facing renewable energy disclosure requirements from customers. A documented rooftop system is a straightforward answer.
Carbon credits
Available in some cases for verified emissions reductions. Worth exploring at scale, though it should be treated as an upside rather than a basis for the investment decision.
Corporate reporting
For businesses reporting under sustainability frameworks, on-site generation is among the simplest and most defensible reductions to document.
Treat the carbon credit route as project-specific. Eligibility, verification cost and market rates vary, and it should not carry a business case on its own.
Cost drivers
What determines the price of a commercial installation
Commercial and industrial rooftop solar costs less per kW than residential at scale, because fixed costs spread across a larger system and industrial roofs are usually simpler to mount on. The main variables are roof type and condition, array size, whether the connection is LT or HT, the approval route for systems above 10 kW, and distance from the coast.
The roof question to settle first
On an industrial shed, the remaining life of the roof sheet matters as much as the array. A solar system is designed to sit there for 25 years, and if the sheeting has ten years left, that is a conversation to have before installation rather than after. We assess sheet condition, purlin spacing and load capacity at the survey and tell you plainly if the roof should be dealt with first. See also what drives solar prices in Chennai and 10 kW systems.
The process
How a commercial project runs
STEP 01
Energy audit
Twelve months of bills analysed for consumption pattern, load profile, tariff category, sanctioned demand and maximum demand. This is where the system size is actually determined.
STEP 02
Roof and structural assessment
Sheet or slab condition, load capacity, shading, access, cable routing.
STEP 03
Proposal
System size, itemised bill of materials, generation estimate, a savings model including network charges and excluding demand charges, and CAPEX and OPEX options side by side.
STEP 04
Approvals
TANGEDCO application, sanctioned load or demand work where needed. Systems above 10 kW involve a distribution transformer feasibility assessment, which extends the timeline.
STEP 05
Installation
Scheduled around your operations, including weekend or shutdown working where production cannot be interrupted.
STEP 06
Commissioning, metering and handover
With monitoring configured for your team.
STEP 07
Operations and maintenance
One year included, with AMC thereafter.
On timelines: commercial projects run longer than residential, chiefly because of the approval route above 10 kW and the connection work. Expect a longer runway and plan the capital cycle accordingly.
Vendor selection
How to evaluate solar EPC companies in Chennai
Solar EPC companies in Chennai are separated by ten checkable things: whether engineering is done in-house, whether the structural design is certified for Chennai's wind zone, what the EPC scope actually excludes, whether installation is subcontracted, project management and schedule commitments, site safety practice, commissioning documentation, generation guarantees, in-house operations and maintenance capability, and reference projects at comparable scale. Ask every contractor on your shortlist for evidence of all ten before comparing prices.
01
Is the engineering done in-house?
Ask who produces the electrical design, the structural design and the layout drawings, and whether they are signed. If the structure supplier handles structural and the inverter brand's template handles electrical, no one owns the design.
02
Is the structural design certified for Chennai's wind zone?
Chennai sits in a 50 m/s basic wind speed zone under IS 875 Part 3, with a cyclone factor within 60 km of the coast. Ask what the mounting is designed to, who verified it, and whether you can see the calculations. Roof arrays fail at the structure and fasteners, not the glass.
03
What does the EPC scope exclude?
The exclusions list matters more than the inclusions. Look for civil works, cable trenching, DISCOM liaison, transformer or panel upgrades, roof repair, crane and access equipment, and statutory approvals. Anything not named is a variation order later.
04
Who physically installs it?
Many Chennai companies sell and subcontract. Ask who is on your roof, whether they are employees, and who returns in year four when an inverter fault appears.
05
What are the schedule commitments?
A commercial project has a capital budget and a plant calendar attached to it. Ask for milestone dates, what happens if they slip, and whether the contract carries liquidated damages. A contractor unwilling to commit to dates in writing is telling you something.
06
What is the site safety practice?
Work at height on an operating industrial site is a genuine risk, and your liability as well as theirs. Ask about workmen's insurance, safety equipment, method statements and whether they have worked on live production sites before.
07
What commissioning documentation do you receive?
As-built drawings, test reports, cable schedules, earthing test results, warranty registrations and the monitoring configuration. Without these your maintenance team is working blind and a future contractor has to reverse-engineer the plant.
08
Is there a generation guarantee?
Ask what performance is guaranteed, how it is measured, over what period, and what the remedy is if it is not met. A guarantee with no measurement method is not a guarantee.
09
Is operations and maintenance in-house?
A 25-year asset needs servicing for 25 years. Ask whether O&M is delivered by the same company, what the response time commitment is, and what it costs after any included period.
10
Can you see reference projects at similar scale?
A contractor with commercial experience can arrange a site visit to a comparable installation. For a project of this value, visiting one operating plant tells you more than any presentation.
On the price comparison
Compare the bill of materials line by line, not the totals. Two EPC quotes far apart usually differ on module technology, inverter brand and warranty, structure specification, cable sizing and protection equipment. The cheapest quote is frequently the one with the thinnest structure and the shortest inverter warranty — the two components that determine whether the plant is still performing in year twelve.
We are happy to be evaluated on all ten. Ask us for the itemised scope, the structural design basis and a reference site, and compare us against anyone on your shortlist.
Request the scope documentFree, no obligation
Get a commercial energy audit
Send us twelve months of electricity bills for the premises. We will analyse your consumption pattern and tariff category, assess your roof, and return a proposal with a system sized to your actual daytime load rather than to your available roof area — modelled with network charges included and demand charges excluded.
What you receive
- Load profile analysis from twelve months of bills
- Roof and structural assessment, including sheet condition where applicable
- A system size based on daytime self-consumption
- Itemised bill of materials naming every component and brand
- A savings model that separates energy charges from demand charges
- CAPEX and OPEX options side by side, with the depreciation position set out
- Generation estimate and expected payback
Common questions
Commercial solar in Chennai, common questions
For most businesses with meaningful daytime consumption, yes. Payback typically runs three to four years, faster than residential, because commercial tariffs are higher than domestic, consumption falls in daylight hours when the system generates, and accelerated depreciation of up to 40% delivers a tax benefit in the first year. Businesses receive no government subsidy, but the tax treatment more than compensates for a profitable company.
No. PM Surya Ghar is a residential scheme, and commercial and industrial installations are not eligible. Businesses instead access accelerated depreciation of up to 40% in year one and GST input tax credit, which for a profitable company is generally worth considerably more than the ₹78,000 household cap.
Differently from households. Non-domestic consumers are generally on net feed-in rather than the one-for-one net metering available to domestic consumers, meaning exported units are compensated at a feed-in tariff well below the retail rate the business pays on imports. This is why a commercial system should be sized to daytime self-consumption rather than to available roof area.
A provision allowing businesses to claim up to 40% of the solar asset value as depreciation in the first year under the Income Tax Act, with normal depreciation applying thereafter. It converts a significant share of the capital cost into a first-year tax shield. The benefit depends on the business having taxable profit to offset, which is why businesses without that position often prefer the OPEX route.
Under CAPEX the business buys and owns the system, claims the depreciation and GST credit, and keeps the full tariff saving. Under OPEX, also called RESCO, a developer funds, owns and operates the system and the business buys the generated electricity at a fixed rate under a power purchase agreement, with no upfront cost. CAPEX delivers the larger lifetime return; OPEX preserves capital.
No, and be cautious of anyone suggesting it will. Solar reduces the energy charge on units you consume during generating hours. It does not reliably reduce demand charges, which are levied on sanctioned or recorded maximum demand and can peak when the sun is not shining. Network or grid-support charges also apply to prosumers. A credible proposal models all three.
Roughly 80 to 100 square feet per kW, so about 8,000 to 10,000 square feet for a 100 kW system. On industrial sheet roofs the constraint is more often load capacity, purlin spacing and sheet condition than area. The more important question is not how much roof you have but how much daytime load you have.
A TANGEDCO application and metering arrangement, plus sanctioned load or demand work where the system exceeds the existing sanction. Systems above 10 kW involve an assessment of distribution transformer capacity, which extends the approval timeline compared with small residential systems.
Yes, with the landlord's agreement, and it needs care. The system is a long-life asset on someone else's building, so the lease term, renewal rights and what happens to the system at exit all need to be documented before installation. An OPEX arrangement can sometimes suit a leased site better than outright purchase.
A solar EPC company handles engineering, procurement and construction under a single contract, taking responsibility for design, equipment, installation and commissioning of a working plant rather than supplying parts or labour separately. For a commercial buyer the value is single-point accountability: one contractor is answerable for whether the plant performs, rather than three parties attributing problems to each other.
Evaluate contractors on whether engineering is done in-house, whether the structural design is certified for Chennai's 50 m/s wind zone, what the EPC scope excludes, whether installation is subcontracted, schedule commitments and liquidated damages, site safety practice, commissioning documentation, generation guarantees, in-house operations and maintenance, and reference projects at comparable scale. Compare the bill of materials line by line rather than comparing totals.
A dealer sells equipment and an installer mounts it. An EPC contractor is contractually responsible for the plant performing, which means owning the electrical and structural design, the procurement specification, the construction and the commissioning. The practical test is where the design work happens and who signs the drawings.
Yes, where the site has suitable vacant land. Ground-mount suits businesses whose roof cannot take the additional load, whose sheeting is near the end of its life, or whose roof is heavily shaded. It also allows optimal tilt and orientation and easier maintenance access, at the cost of land use and a more involved approval process than rooftop.
Possibly. If the sheeting has less than the system's design life remaining, it should be addressed first, because replacing sheeting under an installed array is expensive and disrupts operations. We assess sheet condition, purlin spacing and load capacity at the survey and tell you plainly.