These energy companies in Chennai primarily operate in oil and gas, utilities, and electrical and electronics manufacturing. The list includes a mix of large conglomerates and specialized firms. Noteworthy companies include Murugappa Group, a conglomerate with diverse interests including engineering and electric vehicles, and BGR Energy Systems, which provides utility industry solutions and EPC contracts for power plants. Fuji Electric India offers energy and automation solutions, while Siemens Gamesa Renewable Power manufactures wind energy generators.
A significant pattern among these companies is their focus on power generation and distribution, with a strong presence in both traditional oil and gas sectors and emerging renewable energy technologies. Most of the companies listed are headquartered in Chennai, indicating the city's role as a hub for the energy sector.
| # | Company | Employees | |||
|---|---|---|---|---|---|
| 1 |
Murugappa Groupmurugappa.com
Conglomerate with businesses in agriculture, engineering, financial services, manufacturing abrasives, ceramics, electric vehicles, auto components, fertilizers, sugar, tea, and more. |
33,648 | |||
| 2 |
BGR Energy Systemsbgrcorp.com
Provides end-to-end utility industry solutions including product manufacturing and turnkey EPC contracts for complete power plant projects. |
2,145 | |||
| 3 |
EID Parry India Ltdeidparry.com
A company in the sugar industry with interests in nutraceuticals Also involved in farm inputs business through a subsidiary |
1,686 | |||
| 4 |
Voltech Groupvoltechgroup.com
A professional Electrical Engineering firm with extensive experience in Testing and Commissioning of medium and heavy duty electrical systems in power and transmission sector |
1,586 | |||
| 5 |
Fuji Electric Indiaindia.fujielectric.com
Provider of a wide range of energy and automation solutions including UPS, drives, inverters, stabilizers, automation systems, and power semiconductors |
1,555 | |||
| 6 | 1,093 | ||||
| 7 |
NUMERIC INDIA - A Group Brand Legrandnumericups.com
Numeric provides top-notch power back-up solutions with a controlled environmental footprint since 1984, serving various industries with world-class manufacturing and support services |
995 | |||
| 8 |
Operational Energy Group India Ltdoegglobal.com
A global technology company offering comprehensive solutions in Power, Process, and Water industries through engineering, project management, EPC, and operations & maintenance services |
945 | |||
| 9 |
Aban Offshore Limitedabanoffshore.com
Leading Indian offshore drilling contractor offering world-class services for oil exploration and production globally with innovative, cost-effective solutions and a highly qualified team |
894 | |||
| 10 |
Bonfiglioli Indiabonfiglioli.in
Global leader in power transmission industry, specializing in gearboxes, drive systems, solar inverters, and tailored solutions for industrial automation, mobile energy, and wind energy applications |
846 | |||
| 11 |
Siemens Gamesa Renewable Power Private Limitedindiamart.com
Manufacturer of wind energy generators, services, and systems for renewable power generation |
834 | |||
| 12 | 
Chennai Petroleum Corp Limited (CPCL), formerly known as Madras Refineries Limited (MRL)cpcl.co.in
An utilities organization based in Chennai, India, specializing in petroleum refining and related operations |
827 | |||
| 13 |
VESTAS WIND TECHNOLOGY INDIA PRIVATE LIMITED
A utility based in Tamil Nadu, India, specializing in wind technology solutions on Old Mahabalipuram Road in Chennai |
811 | |||
| 14 |
ABI-SHOWATECH (INDIA) PRIVATE LIMITEDabishowatech.co.in
Global leader in automotive component manufacturing, specializing in investment casting and machining of turbo charger and safety critical parts with industry accreditations and NADCAP approved special processes |
703 | |||
| 15 |
ReGen Powertechregenpowertech.com
A leading wind energy company in India, offering turnkey solutions for wind power projects, with a focus on clean, green, sustainable energy production |
658 | |||
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| 16 |
TMTL Engines - Eicher Enginestmtl.in
A division of a leading conglomerate in India, TMTL Engines manufactures air and water cooled engines for automotive, stationary, and industrial applications with a focus on power generation |
652 | |||
| 17 |
Fenice Energyfeniceenergy.com
Specializing in clean energy solutions for homes, Fenice Energy offers solar, backup power, and eV charging services with over 20 years of experience |
561 | |||
| 18 |
Toshiba JSW Power Systems Pvt.Ltd.toshiba-tjps.in
A joint venture offering high-quality maintenance services and advanced digital solutions for thermal power plants in India to drive efficiency and reduce environmental impact |
561 | |||
| 19 |
ANDRITZ Technologies - Indiaandritz.com
Specializes in providing technologies for various industries including metals, pulp and paper, feed, biofuel, and separation, with operational presence in multiple Indian regions |
520 | |||
| 20 |
Indira Gandhi Centre for Atomic Research (IGCAR)igcar.ernet.in
A research organization located in Kalpakkam, Chennai, India, focusing on atomic research and technological advancements in the field |
511 | |||
| 21 |
Refex Grouprefex.group
A diversified group based in India with interests in chemicals, energy, pharma, medical tech, sustainable mobility, and airport operations, focused on enhancing ESG practices |
472 | |||
| 22 |
Ganges Internationale Pvt. LTD.gangesintl.com
A leading manufacturer of fabricated structures for various industries with a strong global presence and extensive experience in executing solar PV projects |
453 | |||
| 23 |
CREW(P)Ltd.crewpl.com
Specializing in Bulk Material Handling systems for Thermal Power Plants & Ports, offering Engineering services, operation & maintenance in multiple states across India |
452 | |||
| 24 |
NISSI Engineering Solution Pvt. Ltd.nissi.co.in
Specializing in electrical engineering, NISSI provides high-quality solutions for power transmission, distribution, and automation, focusing on innovation, reliability, and customer success |
448 | |||
| 25 |
VOLTECH O AND M SERVICES PVT LTDvoltechgroup.com
Professional services in Operation and Maintenance for Oil & Gas, Power, and Industrial sectors, offering total O&M services and project lifecycle support |
404 | |||
| 26 |
NRP Projects Private Limitednrpprojects.in
A leading engineering construction provider in India, specializing in design, engineering, procurement, and project management services for the oil and gas industry |
399 | |||
| 27 |
Nippo (Indo National Ltd)nippo.in
A leading manufacturer and marketer of dry cell batteries, consumer battery products, LED lights, and electrical accessories in India Also distributes razors and blades |
399 | |||
| 28 |
Everreneweverrenew.com
Everrenew provides project management solutions for wind, solar, and hybrid projects, along with asset management, to help organizations move towards a sustainable future |
384 | |||
| 29 |
Kshema Powerkshemapower.com
A specialized Indian EPC service company in the Renewable energy industry, with expertise in Wind projects and land development for solar projects |
345 | |||
| 30 |
Tamilnadu Electricity Boardtangedco.gov.in
A government-owned power generation and distribution company based in Tamil Nadu, India |
341 | |||
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How this list is built
Every company on this list has a Tamtam company profile. The industry is the one the company gives on LinkedIn; categories such as SaaS or fintech are classified by Tamtam's AI from the company's website and LinkedIn page; and the headquarters city must match the company's own address. Companies are ranked by the number of employees on LinkedIn, and the list is refreshed every night. Classifications can be wrong, so treat the list as a starting point rather than an official ranking. Last updated Nov 11, 2026.
More company lists in Chennai
- The largest companies in Chennai 1,042
- Multinational companies in Chennai 211
- Manufacturers in Chennai 177
- Companies with in-house R&D in Chennai 132
- IT Services and IT Consulting companies in Chennai 118
- Education providers in Chennai 109
- IT services companies in Chennai 107
- Hardware manufacturers in Chennai 87
- Retail chains in Chennai 68
- Financial Services companies in Chennai 64
- Professional services firms in Chennai 64
- Financial services firms in Chennai 61
- Publicly traded companies in Chennai 61
- Companies with a mobile app in Chennai 60
- Corporate groups and holding companies in Chennai 56
- Consulting firms in Chennai 51
- Automotive manufacturers and suppliers in Chennai 50
- Critical infrastructure operators in Chennai 50
- Higher Education companies in Chennai 50
- AI companies in Chennai 45
- Software Development companies in Chennai 45
- Education Administration Programs companies in Chennai 43
- Hospitals and Health Care companies in Chennai 42
- Healthcare providers in Chennai 41
The same list elsewhere in India
- Energy companies in India 631
- Energy companies in Maharashtra 154
- Energy companies in Gujarat 64
- Energy companies in Haryana 51
- Energy companies in Tamil Nadu 49
- Energy companies in Uttar Pradesh 45
- Energy companies in Karnataka 44
- Energy companies in West Bengal 36
- Energy companies in Rajasthan 25
- Energy companies in Mumbai 92
- Energy companies in New Delhi 72
- Energy companies in Gurugram 44
- Energy companies in Bengaluru 35
- Energy companies in Kolkata 34
- Energy companies in Ahmedabad 33
- Energy companies in Pune 31
- Energy companies in Noida 28