India’s commercial and industrial (C&I) rooftop solar market is expanding as factories, warehouses, hospitals, shopping malls and office campuses invest in solar installations to reduce electricity expenses. Tata Power Solar, Roofsol Energy, Mahindra Solarize, Kalpa Power, Hartek, Orb Energy, Fourth Partner Energy, Enerparc, Jakson, Sunsure Energy, CleanMax, Gentari, Candi Solar, Waaree Energies and SunSource Energy are among the companies competing for commercial solar customers.
India reached 25.73 GW of rooftop solar capacity by March 31, 2026, within total installed solar capacity of 150.26 GW. Rooftop additions during FY2025–26 reached 8.71 GW, including 6.72 GW under PM Surya Ghar and approximately 2 GW from C&I installations.
According to the Ministry of New and Renewable Energy, broader C&I renewable procurement, including captive projects, added approximately 15 GW through different procurement arrangements.
Commercial rooftop solar providers are competing through financing, installation costs, engineering capabilities, energy savings, remote monitoring and long-term maintenance contracts.
Top 15 Commercial Rooftop Solar Providers in India: Achievements and Customer Strategies
1. Tata Power Solar: National EPC Network and Flexible Financing
Tata Power Solar offers commercial rooftop solar engineering, procurement, construction, installation and maintenance services.
In March 2026, Tata Power Renewable Energy partnered with Tata Capital to introduce SunSmart Flexi EMI, a financing programme designed to align loan repayments with expected solar generation.
Tata Power’s customer-winning strategy combines brand recognition, national installation capabilities, financing options and after-sales services.
The SunSmart financing initiative targets customers seeking solar ownership without paying the entire installation cost upfront.
2. Roofsol Energy: Rooftop Installation Specialization
Roofsol Energy competes through its focus on rooftop solar engineering and project execution.
The company was among India’s leading rooftop installers in Mercom’s 2025 market assessment.
Its customer strategy emphasizes customized rooftop designs, installation execution and commercial solar applications.
Industrial customers should evaluate Roofsol’s commissioned project capacity, structural engineering experience, installation timelines and maintenance commitments.
3. Mahindra Solarize: Industrial Solar Engineering
Mahindra Solarize is another prominent participant in India’s commercial rooftop solar installation market.
The company featured among leading installers in the 2025 market assessment.
Its competitive strategy emphasizes engineering, electrical integration, installation quality and rooftop solutions for industrial and commercial buildings.
Customers should compare structural designs, inverter specifications, energy generation forecasts and long-term service agreements.
4. Kalpa Power: Distributed Solar Project Execution
Kalpa Power was included among India’s leading rooftop solar installers in 2025.
The company competes for commercial projects through rooftop engineering, equipment procurement and distributed solar installations.
Its customer-winning strategy centers on project execution, installation capabilities and commercial rooftop applications.
Businesses should request commissioned project references, installation schedules, equipment warranties and verified generation data.
5. Hartek Power: Industrial Rooftop Solar and Electrical Infrastructure
Hartek Power combines rooftop solar EPC with electrical infrastructure capabilities.
In January 2025, Hartek announced an 8 MW solar contract for Kandhari Beverages. Its subsequent project portfolio identified 14 MW as commissioned.
Hartek’s customer strategy combines rooftop installation with electrical engineering, transformer integration and grid connectivity.
Its experience is particularly relevant to industrial customers requiring coordination between solar installations and existing power infrastructure.
The Mercom rooftop solar installer assessment identifies Tata Power Solar, Roofsol, Mahindra Solarize, Kalpa Power and Hartek among leading companies. Together, they accounted for 23.6 percent of the market covered by the assessment.
6. Orb Energy: ₹340 Crore SME Solar Financing
Orb Energy differentiates itself through rooftop solar installations and financing for small and medium enterprises.
The company reports financing more than 360 SMEs and disbursing over ₹340 crore.
Its customer acquisition strategy addresses one of the biggest barriers to commercial rooftop solar adoption: upfront investment.
Through its solar finance programme, Orb Energy targets businesses seeking ownership of solar assets through structured repayment arrangements.
7. Fourth Partner Energy: 370 MW Operational Rooftop Portfolio
Fourth Partner Energy is a major commercial and industrial renewable energy developer offering rooftop solar and related energy solutions.
The company had approximately 370 MW of operational rooftop solar across 24 Indian states, according to figures reported in November 2025.
Its customer-winning strategy emphasizes developer-funded installations, power purchase agreements and long-term electricity supply.
The company also offers renewable energy and storage solutions, enabling customers to evaluate rooftop solar alongside other procurement options.
8. Enerparc: Industrial Rooftop Engineering and Financing
Enerparc provides commercial rooftop solar through CAPEX, OPEX and deferred-CAPEX models.
Its project references include a 2.5 MWp installation for Saint-Gobain in Palakkad, Kerala, and another 2.5 MWp project for Honda in Karnataka.
Enerparc’s competitive advantages include industrial rooftop design, non-penetrative mounting systems and remote performance monitoring.
Its customer strategy focuses on customized financing and engineering solutions for large commercial buildings and factories.
9. Jakson: Solar EPC and Electrical Integration
Jakson combines solar EPC capabilities with electrical infrastructure expertise.
Its commercial rooftop services can support engineering, procurement, installation, transformer integration and grid connectivity.
Jakson’s customer strategy targets industrial businesses seeking solar installation alongside electrical infrastructure upgrades.
Customers should distinguish Jakson’s utility-scale project experience from its specific commissioned commercial rooftop references.
10. Sunsure Energy: Integrated Corporate Renewable Procurement
Sunsure Energy offers commercial customers renewable electricity solutions involving rooftop solar, open-access power, wind and energy storage.
Its customer acquisition strategy emphasizes matching electricity procurement with industrial demand patterns.
For large manufacturers, Sunsure can offer alternatives when rooftop space is insufficient to meet total electricity consumption.
Customers should compare onsite solar capacity, offsite renewable supply, contracted tariffs and operational references separately.
11. CleanMax: 338.84 MW Operational Onsite Solar
CleanMax specializes in renewable electricity solutions for corporate and industrial customers.
As of March 2025, CleanMax reported 338.84 MW of operational onsite capacity across more than 1,350 plants.
Its customer-winning strategy focuses on developer-funded installations and long-term power purchase agreements, reducing customers’ initial capital requirements.
CleanMax also offers broader renewable energy procurement options. Its reported onsite capacity includes installations that are not necessarily rooftop systems.
12. Gentari: Integrated Solar and Storage Solutions
Gentari, incorporating the former Amplus Solar business, offers onsite solar, ground-mounted projects, floating solar, open-access renewable electricity and storage solutions.
Its customer strategy combines multiple renewable technologies with financing and long-term energy supply agreements.
Large industrial customers can evaluate rooftop solar alongside offsite generation and battery storage under broader energy procurement arrangements.
13. Candi Solar: Zero-Upfront-CAPEX Business Model
Candi Solar finances, develops and operates commercial solar projects.
Its customer strategy focuses on businesses seeking lower electricity costs without making large initial capital investments.
Under developer-funded arrangements, customers purchase electricity through contractual agreements rather than directly financing the installation.
Key commercial considerations include PPA tariffs, escalation, ownership, maintenance and contract termination provisions.
14. Waaree Energies: Solar Manufacturing and EPC Integration
Waaree Energies combines solar module manufacturing with project engineering and EPC capabilities.
Its manufacturing operations support module procurement and equipment availability for commercial solar projects.
Waaree’s customer-winning strategy emphasizes manufacturing-backed supply, solar technology and project delivery.
Businesses should verify the contracting EPC entity, module specifications, installation references and service responsibilities.
15. SunSource Energy: Distributed Solar for Commercial Customers
SunSource Energy develops distributed renewable energy solutions for businesses.
Its services address commercial customers seeking onsite solar installations and broader renewable electricity procurement.
Its competitive strategy focuses on project development, financing structures and long-term energy supply relationships.
Customers should compare commissioned rooftop installations separately from ground-mounted and offsite renewable projects.
Commercial Rooftop Solar Costs and Savings in India
A 100 kW commercial rooftop solar installation can deliver substantial electricity savings when generation is consumed onsite.
₹45 lakh
Illustrative investment
1.45 lakh
Annual electricity units
₹12.51 lakh
Annual benefit after O&M
3.6 years
Simple payback period
Illustrative assumptions: ₹9/kWh avoided tariff, 145,000 kWh annual generation, full onsite consumption and ₹54,000 annual O&M. Actual results vary.
CAPEX vs OPEX: How Solar Companies Win Customers
Under CAPEX, businesses own solar installations and retain electricity savings after operating expenses. Tata Power Solar and Orb Energy offer financing options supporting ownership.
Under OPEX or RESCO models, developers finance installations and sell electricity through long-term PPAs. CleanMax, Fourth Partner Energy, Gentari and Candi Solar compete in this segment.
Customers should compare electricity tariffs, financing costs, annual escalation, generation guarantees and maintenance obligations.
2027 Outlook: Financing, AI Monitoring and Storage Drive Competition
Commercial rooftop solar competition in India will depend on flexible financing, engineering quality, monitoring capabilities and integration with battery storage.
AI-enabled monitoring can help identify inverter faults, abnormal generation and maintenance requirements, while batteries can improve solar self-consumption where tariffs and demand patterns support the investment.
Tata Power Solar, Roofsol, Mahindra Solarize and Hartek are relevant to EPC procurement, while Fourth Partner Energy, CleanMax, Gentari and Candi Solar offer developer-funded alternatives.
For commercial customers, the strongest provider will be the one offering verified project performance, competitive lifetime electricity costs, reliable maintenance and enforceable generation commitments.
SHAFANA FAZAL
