Top 10 Solar Plant Installation Companies in India 2026
India’s industrial energy landscape is changing in a way that people in factories, warehouses, and manufacturing units actually notice on their monthly bills. The era of "solar energy" existing merely as a marketing tactic has passed. Currently, one of the main operational decisions that business leaders will make is selecting the right partner to build a ground-mounted solar facility that will provide reliable service for years into the future. How do you filter out and decide who your partners should be based on actual experience implementing photovoltaic systems in different weather conditions, and who can actually produce real energy versus market-type hype?
The information presented in this document summarizes accurate options for industrial solar plant companies in India as of 2026, highlighting those who have accomplished substantial installations of photovoltaic systems in India and who continue to deliver upon their commitments to their customers with regard to performance and scheduled completion.
Importance of Partner Selection
Industrial photovoltaic facilities are substantially different from home or small-scale photovoltaic systems in that they represent multi-million rupee projects that must take into consideration: energy regulation, the ability of the electricity grid to accommodate the facility's output, site obstacles, civil design, and, most importantly, long-term performance of the facility. If you perform due diligence while choosing appropriate solar EPC contractors in India, you may experience delays in commissioning, poor performance levels, warranty headaches, and costly redesigns that will not be covered after the warranty period ends.
Purchasers who do their research ask many questions concerning:
Engineering quality and component choices, not just headline capacity figures
Past performance ratios, real Plant Load Factor outcomes versus estimates
Operations & Maintenance capability, beyond installation
Turnkey experience across design, procurement, construction, testing, and certification
These are not buzzwords. They are the things that determine whether a solar plant actually pays for itself on schedule.
Now let’s look at who is doing that work in India’s industrial arena today.
1. Green Revolution Powerpark: Grounded, Practical, Industrial-first
Green Revolution Power Park is built around one clear expectation: industrial solar must work reliably on real sites, not just look good on paper. Being one of the best solar EPC companies in India, the company focuses on the kind of large-scale, ground-mounted solar projects where decisions on land, design, and execution directly affect long-term performance.
GRPP’s approach is straightforward and disciplined. Projects begin with on-ground feasibility, not assumptions. Engineering is shaped by site conditions, grid requirements, and operating realities. Procurement is handled with durability and compatibility in mind. Execution follows controlled sequencing, and commissioning is treated as a technical handover, not a milestone photo. Long after power starts flowing, O&M teams remain responsible for keeping systems stable and predictable.
What sets Green Revolution Power Park apart is its understanding of the industrial context. A solar plant is not a sustainability badge or a portfolio metric. It is infrastructure that must integrate with load profiles, grid behaviour, operating schedules, and energy cost planning. Factors like soil behaviour, access constraints, module alignment, and performance monitoring are treated as core engineering inputs, not post-installation fixes.
Clients who work with GRPP value clarity over claims and accountability over presentation. The company does not trade in hype or shortcuts. It delivers solar plants designed to perform consistently, managed end-to-end by teams that stay responsible long after commissioning.
2. Tata Power Solar: Veteran Industrial Players
Tata Power Solar remains one of India’s most experienced EPC solar companies. With decades in the field and a portfolio that spans hundreds of megawatts of utility and industrial-scale projects, Tata Power Solar is a go-to for companies that want deep experience and financial resilience backing their project execution. Tata Power Solar offers a range of solar infrastructure services, including both significant solar energy farms and specific custom-built solar and wind power facilities, depending on the demand from the respective industries.
According to many industrial users who purchase solar power from Tata Power Solar, the company's consistent professionalism in the execution of its projects has been key to its success. Furthermore, they are also recognized for completing large engineering projects under time constraints.
3. Sterling & Wilson Renewable Energy: Large Volume and Scale
Sterling & Wilson is one of the largest solar EPC service providers around the world, with a large number of large-scale projects in both India and worldwide. The amount of solar energy capacity Sterling & Wilson has built demonstrates their ability to effectively mobilize teams, logistics, and engineering to perform large-scale activities.
Many industrial companies have plans to build large ground mounted solar plant companies in India, and Sterling & Wilson's capacity as EPC can work to the advantage of those industrial companies as long as they are able to establish performance benchmarks for Sterling & Wilson to meet.
4. Vikram Solar: Engineering Excellence with Manufacturing and EPC Experience
Vikram Solar combines significant experience in both module manufacturing and EPC project execution. They have an excellent portfolio that showcases their technical and performance-oriented approach to their many commercial and government projects. They have a wide range of project experience, both in India and internationally, allowing the execution teams to leverage their extensive project experience in executing projects in challenging geographies and electric grid conditions.
Many industrial customers are selective in continuing to conduct business with Vikram Solar due to a priority for long-term module performance and robust engineered systems.
5. Waaree Renewable Technologies: Integrated Scale with Structured Execution
Waaree Renewable Technologies operates as the EPC and execution-focused arm of one of India’s most established solar plant installation company ecosystems. The Waaree Group provides complete solar EPC services to commercial and utility customers for rooftop, ground power, and utility-scale development projects with a turnkey solution.
The scope usually encompasses feasibility evaluation/engineering/procurement/construction, as well as the ongoing care of the project - everything provided as a single plan. Also, Waaree Renewable Technologies is an integrated manufacturer with a large capacity for module assembly output and expands its renewable energy asset portfolio; therefore, supply chain alignment is integrated with project execution coordination on large-scale investments.
Waaree continues to acquire a number of multi-megawatt EPC contracts from both industrial and utility markets, with evidence of ongoing participation by Waaree in India's expanding opportunities for solar project development.
6. Adani Solar: Large Balance Sheet, Wide Reach
Part of a large conglomerate, Adani Solar operates at scale and often wins large EPC solar services contracts because of its financial muscle and integrated supply chains. The flip side is that size can sometimes add complexity to bespoke industrial needs. Yet for large, standardised ground mounted solar power plant installations, Adani’s capacity to deliver hardware and execution reliably is a notable strength.
7. Goldi Solar: Fast-Scaling Manufacturer with Expanding EPC Presence
Goldi Solar has grown rapidly within India’s solar sector by combining large-scale module manufacturing with a steadily expanding EPC and project execution portfolio. Headquartered in Gujarat, the company operates across manufacturing, solar EPC services, and independent power production for commercial and industrial applications.
With module manufacturing capacity reaching approximately 14.7 GW and exports spanning more than 20 countries, Goldi Solar brings manufacturing-led coordination into its EPC offerings. Its project scope includes design, procurement, installation, and performance-focused delivery for captive and grid-connected solar plants across industrial and commercial segments.
Goldi Solar stands as a fast-scaling and increasingly credible contender within India’s evolving industrial solar EPC landscape.
8. Mahindra Susten: Engineering and Execution
As the leader in solar with a multi-gigawatt portfolio, Mahindra Susten has brought to bear its engineering discipline and project execution processes. They particularly excel at constructing through systematic execution, along with ensuring all customers receive what they ordered.
This makes them a credible choice for plants that need tight technical supervision alongside execution.
9. Rays Power Infra: Nimble and Project-Centric
Rays Power Infra Limited has delivered a respectable portfolio of solar EPC projects across India and internationally, showing capability beyond the usual metropolitan corridors. Their track record includes varied terrain and industrial sites, demonstrating a flexible, project-centric approach.
Industrial buyers who value execution agility without surrendering technical discipline often find Rays Power the best solar EPC company.
10. Saatvik Green Energy: Emerging EPC Contender
Saatvik Green Energy has emerged as one of the credible solar EPC contractors with experience across hundreds of megawatts of executed projects. They may be smaller than other older companies, but they have created good patterns of execution and project delivery to the commercial and industrial segments.
If you are an industry in need of an EPC bid that focuses on providing clear answers in a timely manner, then you should think about scheduling with the firm Saatvik.
How Industrial Buyers Evaluate Solar EPC Partners
Listing names is only a starting point. The practical difference in project outcomes happens when industries ask grounded, realistic questions like:
What do they deliver beyond installation?
A top solar plant company never installs and forgets. A long-term operations and maintenance plan that actually keeps panels clean, trackers aligned, and inverters optimised can add multiples of value over a plant’s life.
How do they model performance?
Rather than quoting a general Plant Load Factor or energy yield, top EPC solar companies provide zone-specific simulations, sensitivity analyses for module tilt and soiling, and contingency planning for grid export. That reduces surprises.
What’s their warranty DNA?
Some contracts mention component warranties, but how does the partner manage claims, replacements, and performance guarantees in practice? Clarify responsibilities.
Do they provide transparent reporting?
Industrial Buyers, who classify solar energy expenditures as part of their operational costs, not merely as a marketing opportunity, require the following: Monthly performance reporting, clear thresholds for escalation, in relation to expected levels of performance.
Industrial Insights from 2026 Perspective
India’s solar capacity keeps marching forward, and recent announcements like large state-level projects being commissioned show that utility and industrial solar is not slowing down. Projects in hundreds of megawatts are being deployed within policy timelines, thanks to disciplined solar EPC contractors and clear energy policy direction.
That momentum also raises the bar for industrial buyers. It means EPC contractors are expected to integrate deeper performance engineering into their bids, support asset monitoring, and work collaboratively with clients on risk mitigation.
Grounded Takeaways for Industrial Decision-Makers
Track record matters more than brand claims. Look at completed industrial-scale ground mounted solar power plant installations, not just marketing brochures.
Engineering sophistication is practical, not jargon. Understand CUF expectations, realistic performance ratios, and seasonal yield variations.
Long-term support is part of the project cost. A well-executed plant with no support can cost more in performance losses than a slightly pricier EPC partner with robust O&M services.
The companies listed here represent established, emerging, and industrial-focused players shaping the practical landscape for solar plant companies in India in 2026.
Solar adoption is far from a fad. For industries, it’s a strategic lever for cost control and energy reliability. But the difference between a plant that just “looks good on paper” and one that delivers year after year starts with choosing a partner who treats engineering, execution, and long-term performance as a pact, not a pitch.
