Top 10 Solar EPC Companies in India: Services, Process and Cost

India's solar energy sector has grown rapidly, creating demand for reliable solar EPC companies in India that can manage projects from initial planning to commissioning and long-term operation.

EPC stands for Engineering, Procurement and Construction. A solar EPC company generally manages the technical design, equipment procurement, installation, testing and commissioning of a solar power project. Depending on the project and contract, EPC providers may also offer monitoring, maintenance and long-term O&M services.

India's solar market now includes residential rooftops, commercial and industrial installations, large ground-mounted plants and utility-scale projects. As of August 31, 2026, India had 168.04 GW of cumulative installed solar capacity, including 32.59 GW of grid-connected rooftop solar.

Top 10 Solar EPC Companies in India

There is no single official government ranking of the top 10 solar EPC companies. The companies below are therefore presented as notable players in India's solar EPC and project-development ecosystem, rather than as a definitive industry ranking.

1. Bluebird Solar

Bluebird Solar provides turnkey solar EPC solutions covering site analysis, financial modelling, system design, component procurement, installation, commissioning and O&M.

The company serves residential, commercial, institutional and government customers and works across rooftop and ground-mounted solar projects, as well as CAPEX-based installations.

Bluebird Solar also has an automated solar PV manufacturing facility in Greater Noida and manufactures modules using technologies including N-Type TOPCon, Mono PERC, bifacial, DCR and Non-DCR. Its current company information states a 2.5 GW manufacturing capacity and more than 1 GW of PV modules supplied during the last three years.

For businesses looking for an EPC partner that can combine solar module manufacturing with project execution, this integrated capability can be relevant.

2. Tata Power Solar

Tata Power Solar is one of the established names in India's solar industry, with activities spanning solar manufacturing, rooftop solutions and large solar projects.

Its long presence in the Indian power sector has made it a familiar name in both commercial and utility-scale solar.

3. Adani Solar / Adani Group

Adani has a large presence across solar manufacturing and renewable power development.

Adani Solar's manufacturing ecosystem includes cells and modules, while Adani Green Energy develops and operates large renewable energy projects. Adani Solar currently states 4 GW of cell and module manufacturing capacity and 2 GW of ingot and wafer manufacturing capacity.

4. Waaree Energies

Waaree Energies operates across solar manufacturing, EPC and renewable energy solutions.

Its EPC activities cover different project segments, including commercial, industrial and utility-scale installations. Waaree is also one of the companies frequently included in industry discussions of India's major solar EPC players.

5. Larsen & Toubro

Larsen & Toubro brings extensive engineering and infrastructure experience to the renewable energy sector.

Its solar and renewable-energy activities include large and technically complex projects where engineering, construction management and grid infrastructure are important parts of execution.

6. Sterling and Wilson Renewable Energy

Sterling and Wilson Renewable Energy is known for its focus on utility-scale solar EPC projects in India and international markets.

Its experience covers large solar power projects and associated engineering and construction activities.

7. Vikram Solar

Vikram Solar is an Indian solar module manufacturer that also provides EPC and project solutions.

Its portfolio includes solar projects across different segments, with the company combining module manufacturing capabilities with project execution experience.

8. Mahindra Susten

Mahindra Susten operates in renewable energy and solar project development and EPC.

The company has worked on large-scale solar projects and provides engineering and project-management capabilities for utility and commercial applications.

9. Jakson Group

Jakson Group is active across solar EPC and other energy infrastructure solutions.

Its solar business includes rooftop and ground-mounted projects, along with solutions for commercial and industrial customers. Jakson's own industry overview also highlights rooftop solar EPC as a segment in which several established Indian companies operate.

10. CleanMax

CleanMax focuses strongly on renewable energy solutions for commercial and industrial customers.

The company is known for developing solar projects for businesses and has experience with rooftop and other distributed solar applications.

With this growth, choosing an EPC partner is an important part of planning a solar project.

What Is a Solar EPC Company?

A solar EPC company provides an end-to-end solution for developing and installing a solar power system. The three main stages are:

1. Engineering

The engineering stage involves understanding the site and designing the solar system around its requirements.

This may include:

• Site survey and feasibility analysis
• Solar resource assessment
• System sizing
• Module and inverter selection
• Electrical design
• Structural design
• Shadow analysis
• Generation estimation
• Project documentation

A good design should consider the site's available space, electricity demand, grid connection, weather conditions and expected energy generation.

2. Procurement

Once the system design is finalised, the EPC company arranges the required equipment.

Depending on the project, this can include:

• Solar PV modules
• Inverters
• Mounting structures
• DC and AC cables
• Combiner boxes
• Transformers
• Switchgear
• Monitoring equipment
• Earthing and lightning protection systems

For projects where domestic-content or government requirements apply, the eligibility of modules and other components should also be checked against the applicable rules. MNRE maintains the Approved List of Models and Manufacturers (ALMM) and publishes updates to the applicable lists and requirements.

3. Construction

The construction stage converts the engineering plan into a working solar power plant.

It generally includes:

1. Site preparation
2. Structure installation
3. Solar module installation
4. DC cabling
5. Inverter installation
6. AC-side electrical work
7. Earthing and protection
8. Grid connection
9. Testing
10. Commissioning

This integrated approach gives the project owner a single point of coordination instead of managing several independent contractors.

What Services Do Solar EPC Companies Provide?

Solar EPC services can differ from one company to another, but a complete turnkey project may include:

Site Survey and Feasibility

The EPC team evaluates the location, available area, electricity consumption, roof or land conditions, grid connectivity and other project requirements.

System Design and Engineering

The system is designed according to the project's capacity and operating requirements. Module layout, inverter sizing, cable selection, structure design and expected generation are considered during this stage.

Equipment Procurement

The EPC company sources the modules, inverters, structures and other components required for the project.

Installation and Construction

The equipment is installed according to the approved engineering design and project safety requirements.

Testing and Commissioning

After installation, electrical and performance checks are carried out before the system is commissioned.

Monitoring and O&M

Many EPC providers also offer operation and maintenance services after commissioning. These can include system monitoring, preventive maintenance, cleaning, inspection and troubleshooting.

Solar EPC Project Process in India

A typical solar EPC project follows several stages.

Step 1: Requirement Assessment

The EPC company first understands the customer's electricity consumption, project objectives, available space and budget.

Step 2: Site Survey

The technical team examines the rooftop or project site, electrical infrastructure, shadow conditions, structural requirements and grid connection.

Step 3: System Design

Based on the site assessment, the EPC team prepares the module layout, electrical design, inverter configuration and expected generation estimate.

Step 4: Commercial Proposal

The customer receives a proposal covering system capacity, equipment specifications, project scope, estimated generation, commercial terms and expected timeline.

Step 5: Procurement

After the project is confirmed, the EPC company procures the required modules, inverters, mounting structures and balance-of-system components.

Step 6: Installation

The construction team installs the mounting structure, modules, electrical equipment and required safety systems.

Step 7: Testing and Commissioning

The completed system is tested before being connected to the required electrical network.

Step 8: O&M

After commissioning, the EPC company may continue supporting the project through monitoring, maintenance and troubleshooting services.

How Much Does a Solar EPC Project Cost in India?

There is no single price for a solar EPC project.

The final cost depends on:

• Solar system capacity
• Module technology and wattage
• Inverter type and capacity
• Mounting structure
• Rooftop or ground-mounted installation
• Site conditions
• Electrical infrastructure
• Transformer and evacuation requirements
• Civil work
• Installation and labour
• Transportation
• Monitoring system
• O&M requirements
• Applicable taxes and regulatory charges

A small rooftop project and a multi-megawatt solar plant can therefore have very different project costs.

For residential rooftop systems under PM Surya Ghar Muft Bijli Yojana, the central financial assistance for eligible residential consumers can reach ₹78,000 for systems of 3 kW and above, subject to the scheme's conditions. The scheme is specifically for the residential sector; commercial and industrial consumers do not receive this central financial assistance under the residential CFA component.

For commercial, industrial and utility projects, EPC pricing is generally determined through project-specific quotations rather than a single national price.

What Should You Check Before Choosing a Solar EPC Company?

Before signing an EPC contract, compare more than just the quoted price.

Project Experience

Check whether the company has completed projects similar to yours in size, technology and location.

Module and Inverter Quality

Review the specifications, certifications, warranty terms and applicable approvals of the equipment being proposed.

Engineering Capability

A detailed design can have a direct impact on energy generation, safety and long-term system performance.

Project Timeline

Ask for a clear execution schedule covering procurement, installation, grid connection and commissioning.

Warranty and O&M

Understand exactly what is covered under product warranties, workmanship warranties and O&M contracts.

After-Sales Support

A solar plant is a long-term asset. Local service capability and responsive technical support can therefore be important.

Regulatory Experience

The EPC company should understand applicable DISCOM, grid-connection, net-metering, open-access or other regulatory requirements relevant to the project.

Why Solar EPC Matters for Long-Term Project Performance

Installing solar panels is only one part of building a solar power system.

The design, equipment selection, electrical configuration, installation quality and commissioning process all affect how the system performs over time.

An experienced EPC partner brings these activities together under one project plan. This can make coordination easier and help reduce the possibility of design conflicts, procurement delays and installation errors.

For larger projects, the EPC partner may also play an important role in project scheduling, quality control, safety management and long-term O&M.

Why Consider Bluebird Solar for Solar EPC Projects?

Bluebird Solar offers an end-to-end EPC approach rather than focusing only on solar panel supply.

Its turnkey EPC services cover site analysis, financial modelling, system design and engineering, component procurement, construction, commissioning and O&M. The company works with rooftop and ground-mounted solar projects and serves residential, commercial, institutional and government customers.

Bluebird Solar also has in-house solar PV manufacturing capabilities. Its current company profile states a 2.5 GW automated manufacturing capacity in Greater Noida, with products including N-Type TOPCon, bifacial solar, Mono PERC, DCR and Non-DCR modules.

This combination of module manufacturing and EPC execution can be useful for businesses and project developers looking for a single solar partner for equipment and project delivery.

Conclusion

The growing number of solar EPC companies in India gives businesses and project developers more options for building solar power systems. However, the right EPC partner depends on the project's size, technology, location, budget, grid requirements and long-term operating goals.

Instead of comparing companies only on the lowest quotation, evaluate their engineering capability, equipment quality, project experience, execution process, warranty terms and after-sales support.

For businesses planning rooftop, commercial, industrial or ground-mounted solar projects, a well-planned EPC approach can make the transition from project concept to commissioned solar plant much more straightforward.

Frequently Asked Questions

What does EPC mean in solar?

EPC stands for Engineering, Procurement and Construction. A solar EPC company manages the design, procurement, construction, testing and commissioning of a solar project.

What does a solar EPC company do?

A solar EPC company can handle site assessment, system design, equipment procurement, installation, electrical work, commissioning and, depending on the contract, O&M services.

How much does solar EPC cost in India?

Solar EPC costs vary according to system capacity, equipment, installation type, site conditions, electrical infrastructure and project requirements. There is no single price applicable to every project.

Which type of solar project can an EPC company handle?

Depending on its capabilities, an EPC company may handle residential rooftops, commercial and industrial systems, institutional projects, ground-mounted plants, carports and utility-scale solar projects.

Is solar EPC available for commercial and industrial projects?

Yes. Solar EPC companies commonly provide turnkey solutions for commercial and industrial customers, including rooftop and ground-mounted systems.

What should I check before selecting a solar EPC company?

Consider project experience, engineering capability, module and inverter specifications, warranties, installation quality, execution timeline, regulatory experience and O&M support.

Does PM Surya Ghar subsidy apply to commercial solar projects?

The central financial assistance under the residential CFA component of PM Surya Ghar is for eligible residential consumers. Commercial and industrial consumers are not covered by that residential CFA.

Why is the EPC company important for a solar project?

The EPC company coordinates the design, procurement, installation and commissioning of the system. Good project execution can help ensure that the plant is built according to its technical design and operating requirements.