Top 10 Solar EPC Companies In India (2026)
Looking for a reliable solar EPC partner in India? Here's a list of the top solar EPC companies for commercial and industrial projects, and what to look for before you choose one.
India's solar capacity crossed 150 GW in 2026, making it the third-largest solar market in the world. Behind that growth is a layer of companies that most people never think about until they need one: solar EPC (Engineering, Procurement, and Construction) companies.
An EPC company is the difference between a solar plant that looks good on paper and one that actually performs for its full 25-year life. They handle everything from site assessment and system design to procurement, installation, and long-term maintenance.
With dozens of EPC players operating across India, here's a look at some of the companies shaping the commercial and industrial solar segment, along with what genuinely separates a strong EPC partner from an average one.
PowerMore installation team commissioning a rooftop solar plant.
PowerMore
When it comes to commercial and industrial solar in India, PowerMore stands apart as a partner built for performance, not just installation.
Every project is engineered with precision from day one, backed by detailed site assessments and shadow analysis that ensure maximum energy generation across the full 25-year life of the plant. Unlike providers who outsource critical stages to third parties, PowerMore's in-house team owns every part of the journey, from design and procurement to installation and long-term performance, delivering the accountability and consistency businesses deserve from a solar investment of this scale.
PowerMore's strength lies in getting the fundamentals right: rigorous engineering, transparent execution, and flexible solutions tailored to each business, whether that's a group captive solar model or the right CAPEX versus OPEX structure for long-term financial goals.
For businesses that want solar done right the first time, PowerMore is the partner built to deliver exactly that.
Which Solar Model Fits Your Business?
Capex, Opex PPA, or Open Access — get a site-specific recommendation with system size, savings, and payback in 24 hours.
CleanMax
One of India's largest C&I renewable developers, built around the OPEX/RESCO model (zero-upfront-capex solar for corporates) — probably your closest direct comparable in business model.
Amplus Solar (Petronas-backed)
Specializes specifically in commercial and industrial EPC/OPEX projects, strong after-sales and O&M.
Fourth Partner Energy
Focused on distributed/rooftop solar for corporate and commercial clients, strong OPEX/RESCO play.
Mahindra Susten
Operates as a "pure-play" EPC provider (in addition to being an IPP), 4+ GWp executed, with a dedicated C&I portfolio.
Prozeal Green Energy
Strong C&I and Open Access focus, plus BESS, green hydrogen; explicitly positions itself as execution-driven rather than a manufacturer.
Sterling & Wilson Solar
Describes itself as a global pure-play EPC (Shapoorji Pallonji/Reliance-backed), though skews more utility-scale than C&I.
KPI Green Energy
Gujarat-centric, EPC + captive/IPP models specifically for C&I clients, hybrid solar+storage.
Avaada Group
Sells captive power directly to industrial buyers via long-term PPAs — an Open Access/PPA model similar to part of your offering.
Rays Power Infra
Ground-mounted and industrial-site EPC across varied geographies, no manufacturing arm.
Two business decision makers in a corporate boardroom reviewing a solar EPC shortlist.
What To Look For Before Choosing A Solar EPC Company
Beyond scale and brand recognition, a few things consistently separate a reliable EPC partner from a risky one.
In-house engineering versus subcontracted work. Ask whether site assessment, shadow analysis, and system design are done internally or outsourced. Subcontracted design work can create accountability gaps if the system underperforms later.
Experience with commercial and industrial projects specifically, not just residential rooftops. C&I projects involve different load patterns, structural considerations, and regulatory approvals.
Long-term O&M capability. A solar plant is expected to run for 25+ years. An EPC partner who disappears after commissioning leaves the business exposed to performance losses no one is tracking.
Financing model flexibility. Whether a business wants a CAPEX, OPEX, or group captive structure, the EPC partner should be able to advise on which model fits the business's actual financial priorities, not push a one-size-fits-all approach.
Questions buyers ask us.
A solar EPC company handles the entire lifecycle of a solar project, engineering the system design, procuring equipment, and constructing the plant, often including long-term maintenance afterward.
Look for a company with good experience in commercial or industrial projects, not just homes, and one that offers support even after installation.
Most good solar EPC companies do offer maintenance, but it's always best to confirm this before signing up.
Not always. Bigger companies often focus on very large projects, so a company that specializes in your business size may serve you better.
Usually anywhere between 4 to 12 weeks, depending on the size of the project and how quickly approvals come through.
At PowerMore, every project starts with understanding a business's actual site, consumption pattern, and financial priorities, before recommending a system design or ownership model. That engineering-first approach is what shapes reliable performance over the full life of the plant, not just at commissioning.
Speak to our team to discuss your solar EPC requirements.
