Solar EPC in India: Growth Drivers, Execution Challenges, and What's Next

India's solar sector is growing at an unprecedented pace. In FY 2025–26, the country added a record 44.6 GW of solar capacity, taking its cumulative installed capacity beyond 162 GW by mid-2026. This makes India the world's third-largest solar market after China and the United States.

This rapid expansion has fuelled strong demand for Solar EPC (Engineering, Procurement, and Construction) companies. These companies are responsible for designing, sourcing equipment, and building solar power plants from start to finish. However, the industry's biggest challenge has shifted. Instead of simply installing more solar panels, developers now have to overcome issues such as land acquisition, grid connectivity, regulatory compliance, and project execution.

Challenges such as land aggregation (combining several smaller land parcels into one project site), grid evacuation (ensuring the electricity grid can carry the power produced), curtailment (reducing power generation because the grid cannot absorb more electricity), and new domestic manufacturing rules under ALMM (Approved List of Models and Manufacturers) List-II increasingly determine whether projects are completed on time.

What is Solar EPC?

Solar EPC is a project delivery model in which one company manages the complete lifecycle of a solar project. Rather than hiring different contractors for different stages, the project owner works with a single EPC company that is responsible for delivering a fully operational solar plant.

The process has three main stages:

• Engineering involves planning and designing the project, including site assessment, estimating how much electricity the plant can generate (yield modelling), preparing layouts, and obtaining regulatory approvals.
• Procurement is the process of purchasing solar panels, inverters, transformers, mounting structures, cables, and all other equipment needed for the project.
• Construction includes civil works, installing equipment, connecting the project to the electricity grid, testing all systems, and commissioning, the stage where the plant officially begins generating electricity.

Many EPC companies also provide Operations and Maintenance (O&M) services, which involve inspecting, repairing, cleaning, and maintaining the plant throughout its operating life.

India's EPC market broadly consists of three segments:

• Large companies executing utility-scale solar projects.
• Mid-sized firms serving the Commercial and Industrial (C&I) market, including factories, warehouses, and office buildings.
• Local installers focused on residential rooftop solar.

Why is India's Solar EPC Market Growing so fast in 2026?

India's Solar EPC market is expanding because of strong government support, increasing electricity demand, and falling solar cell costs.

Government Targets

India aims to achieve 500 GW of non-fossil fuel capacity by 2030, with solar expected to contribute around 280–300 GW. Achieving this target requires installing nearly 50 GW of solar capacity every year, creating a strong pipeline of work for EPC companies.

Cost Competitiveness

Utility-scale solar, or large ground-mounted solar farms supplying electricity to the grid, has become one of India's cheapest sources of new power. Falling equipment prices and improved technology continue to make solar an attractive investment.

Rising Electricity Demand

India's electricity demand continues to increase due to industrial growth, urbanisation, and electrification. Solar projects can generally be built faster than conventional power plants, making them an important solution for meeting future energy needs.

Government Schemes

Several government initiatives continue to support market growth.

The Solar Energy Corporation of India (SECI solar tenders) conducts large renewable energy tenders, providing developers with opportunities to build utility-scale projects.

The PM Surya Ghar: Muft Bijli Yojana encourages households to adopt rooftop solar by offering financial subsidies.

Meanwhile, the Production Linked Incentive (PLI) Scheme supports domestic manufacturing of solar equipment, while the ALMM ensures that eligible projects use approved, domestically manufactured solar products.

Together, these policies have strengthened investor confidence while creating a consistent pipeline of projects for Solar EPC companies.

What are the biggest execution challenges for solar EPC companies in India?

Despite rapid growth, completing projects on schedule remains one of the industry's biggest challenges.

Land acquisition delays remain one of the biggest reasons solar projects in India are completed late. Large solar projects require extensive land with suitable terrain, strong sunlight, and clear ownership records. Bringing multiple smaller plots together into one usable site—known as land aggregation—can significantly delay project timelines.

Another major challenge is grid connectivity. A completed solar plant cannot begin supplying electricity until it is connected to the national electricity grid. In many regions, transmission infrastructure has not expanded as quickly as solar generation, delaying project commissioning.

Curtailment has also become an increasing concern. Even after a project is connected, operators may be instructed to temporarily reduce electricity generation because the grid cannot absorb all the power being produced. This directly affects project revenues and highlights the need for stronger transmission networks and energy storage solutions.

ALMM and Procurement Challenges

One of the biggest recent changes for Solar EPC companies is compliance with ALMM. It is the Government of India's approved list of manufacturers whose solar equipment can be used in eligible projects.

From June 2026, many government-linked, net-metered, and open-access projects must use solar modules made with approved domestically manufactured cells. The objective is to strengthen India's solar manufacturing ecosystem and reduce dependence on imports.

However, demand for compliant domestic cells has grown faster than manufacturing capacity. As a result, EPC companies face longer procurement timelines, higher costs, and greater pressure to secure approved equipment early in the project. Procurement is no longer just about purchasing the lowest-cost materials—it has become a key part of project planning and regulatory compliance.

Why is Solar Power Curtailed?

As India's solar capacity grows, curtailment has become a major operational challenge. Curtailment occurs when a solar plant is asked to temporarily reduce electricity generation because the grid cannot absorb all the power being produced.

This usually happens for two reasons.

Transmission constraints occur when the network of high-voltage transmission lines does not have enough capacity to carry electricity from the solar plant to consumers.

The second reason is grid inflexibility. Since coal-fired power plants cannot quickly reduce their output, grid operators sometimes limit solar generation to maintain a stable electricity supply.

To reduce curtailment, India is investing in stronger transmission infrastructure and Battery Energy Storage Systems (BESS), which store excess solar electricity and supply it later when demand increases.

Leading Solar EPC Companies in India

India's utility-scale Solar EPC market is led by a relatively small group of experienced companies.

Some of the leading players include:

• Tata Power Solar
• Sterling & Wilson Renewable Energy
• Larsen & Toubro (L&T)
• Jakson Green
• Waaree
• Vikram Solar
• Mahindra Susten
• Adani
• ReNew
• Hartek
• Amara Raja Infra

These companies compete not only on project size but also on execution quality, regulatory compliance, and long-term Operations and Maintenance (O&M) capabilities.

What's Next for India's Solar EPC Industry?

The next phase of India's Solar EPC market will focus on improving project execution rather than simply installing more capacity.

One major trend is the growing adoption of Battery Energy Storage Systems (BESS). These systems store excess electricity generated during the day so it can be used later, helping reduce curtailment and improve grid reliability.

Another priority is expanding transmission infrastructure. Better planning of substations, transmission lines, and grid connectivity will help projects become operational more quickly.

Companies will also need to adapt to evolving regulations, including future ALMM requirements, while improving procurement planning and supply chain management.

As India moves towards its 2030 renewable energy targets, EPC companies that consistently deliver projects on time while maintaining quality and compliance are likely to emerge as industry leaders.

Frequently Asked Questions

Conclusion

India's Solar EPC industry is entering a new phase of growth. Strong government support, rising electricity demand, and falling solar costs continue to create opportunities, but success increasingly depends on efficient execution rather than simply building more projects.

Challenges such as land acquisition, grid connectivity, curtailment, and ALMM compliance require careful planning throughout the project lifecycle. At the same time, investments in battery storage, stronger transmission infrastructure, and domestic manufacturing are helping build a more resilient solar ecosystem.

As India works towards its clean energy goals, Solar EPC companies that combine engineering expertise with efficient project management, regulatory compliance, and reliable long-term operations will be best placed to support the country's energy transition.

References

1. 1.International Energy Agency. (2024). India energy outlook 2024. https://www.iea.org/reports/india-energy-outlook-2024
2. 2.JMK Research & Analytics. (2025). India solar market update FY 2025–26. JMK Research & Analytics.
3. 3.Mercom India Research. (2024). State of solar PV project development in India. Mercom India Research.
4. 4.Ministry of New and Renewable Energy. (n.d.). Ministry of New and Renewable Energy. Government of India. https://mnre.gov.in/
5. 5.NITI Aayog, & RMI India. (2023). India's path to net zero: Energy, industry and land use. NITI Aayog.