Indiana's renewable energy sector is dynamic, featuring companies focused on diverse energy solutions like solar and wind technologies. This industry encompasses a range of organizations that specialize in everything from infrastructure construction to energy efficiency and carbon capture. Not only is Indiana experiencing growth in renewable energy investments, but there is also a noticeable shift towards cleaner technologies, driven by sustainability goals and consumer demands. As environmental concerns rise, these companies are increasingly innovating to meet regulatory standards while enhancing energy resiliency.


The companies featured in this list represent a mix of sizes and specialties in Indiana's renewable energy industry. With about 11 to over 5000 employees, they span various sectors including solar panel installation, wind turbine construction, and energy consulting. Many were founded several decades ago, showcasing longstanding expertise, while newer firms are leveraging fresh ideas for market growth. This assortment underscores Indiana’s commitment to renewable energy, reflecting both innovation and strategic response to evolving energy needs.


Continue reading for insights on top renewable energy companies in Indiana.


Top 19 Renewable Energy Companies in Indiana


1. Energy Systems Group (ESG)

  • Website: energysystemsgroup.com
  • Ownership type: Private Equity
  • Headquarters: Newburgh, Indiana, United States (USA)
  • Employee distribution: United States (USA) 98%, Other 2%
  • Latest funding: July 2023
  • Founded year: 1994
  • Headcount: 201-500
  • LinkedIn: energy-systems-group

Energy Systems Group (ESG), founded in 1994 and based in Newburgh, Indiana, is an energy service company that specializes in energy efficiency, sustainability, and electrification solutions. With a workforce of approximately 390 employees, ESG operates across multiple states, providing tailored solutions to clients in sectors such as healthcare, education, and government. The company focuses on helping organizations reduce energy costs and enhance operational efficiency through innovative infrastructure improvements and consulting services. ESG's portfolio includes a range of services, from energy efficiency projects to renewable energy initiatives like solar and carbon capture. Their commitment to sustainability is evident in their efforts to save over 4.8 million megawatt hours of energy, which translates to significant reductions in coal consumption and carbon emissions. ESG's expertise in performance contracting and energy consulting further solidifies their role in driving the clean energy transition.


2. IEA Renewable Energy

  • Website: iea.net
  • Ownership type: Private
  • Headquarters: Indianapolis, Indiana, United States (USA)
  • Founded year: 1977
  • Headcount: 1001-5000
  • LinkedIn: iea-renewable-energy

IEA Renewable Energy, based in Indianapolis, Indiana, is a private infrastructure construction company founded in 1977. With a workforce of around 451 employees, IEA specializes in energy and heavy civil projects, focusing on renewable energy construction, power delivery, and environmental services. The company has a strong track record in the renewable energy sector, having completed over 240 utility-scale projects, including more than 11,000 wind turbines. Their services cover the entire lifecycle of renewable energy projects, from initial site analysis and project design to construction and final grid connection. IEA's clients include energy developers and utility companies, who rely on their expertise to navigate complex infrastructure challenges across North America. Their commitment to safety and quality is evident in their operational practices, which prioritize the well-being of their workforce and the integrity of their projects.


3. IEA Constructors LLC, a MasTec Company

  • Website: ieaconstructors.com
  • Ownership type: Private
  • Headquarters: Indianapolis, Indiana, United States (USA)
  • Employee distribution: United States (USA) 97%, Georgia 3%
  • Founded year: 1977
  • Headcount: 1001-5000
  • LinkedIn: iea-constructors-llc

IEA Constructors LLC, a MasTec Company, is a private construction firm based in Indianapolis, Indiana, established in 1977. Originally founded as RMT, the company has evolved to specialize in energy infrastructure projects, focusing on wind, solar, and power delivery. With a workforce of over 500 skilled professionals, IEA Constructors provides comprehensive construction services that cover the entire project lifecycle, from site development to turbine installation. They have successfully completed numerous large-scale projects across the United States, including significant wind farms and solar facilities. Their commitment to safety is evident in their impressive safety metrics, which reflect a strong culture of risk management. As part of MasTec's Clean Energy and Infrastructure segment, IEA Constructors leverages extensive resources to enhance their project delivery capabilities in the renewable energy sector.


4. Ohio Valley Electric, INC

  • Website: ohiovalleysolar.com
  • Ownership type: Private
  • Headquarters: Newburgh, Indiana, United States (USA)
  • Employee distribution: United States (USA) 100%
  • Founded year: 1997
  • Headcount: 1-10
  • LinkedIn: ohio-valley-electric-inc

Ohio Valley Electric, INC, known as Ohio Valley Solar, is a private solar energy company based in Newburgh, Indiana. Established in 1997, the company has been dedicated to providing solar panel installation and energy efficiency solutions to both residential and commercial customers in Indiana and Kentucky. Ohio Valley Solar aims to help clients reduce their energy costs while promoting sustainable practices through the use of renewable energy sources. Their services include grid-tied and off-grid solar systems, as well as LED lighting solutions, which further enhance energy efficiency. The company emphasizes education about solar energy benefits and is committed to sustainability, recycling a significant portion of its construction waste. Ohio Valley Solar operates with a small team, focusing on personalized service and community engagement, making it a relevant player in the renewable energy sector.


5. Jefferson Electric


Jefferson Electric, founded in 2011 and based in Speedway, Indiana, is a private service company with a workforce of 11-50 employees. The company specializes in solar energy solutions, electrical services, and energy storage systems. They cater to a variety of clients, including homeowners, businesses, and organizations, primarily in Indiana and Ohio. Jefferson Electric offers a comprehensive range of services, from residential and commercial solar panel installations to energy consultations and compliance management. Their commitment to energy independence is evident in their tailored solutions, which aim to reduce clients' carbon footprints. Additionally, they have partnered with Tesla to provide installation services for battery storage systems and electric vehicle chargers, showcasing their dedication to advancing renewable energy infrastructure. With over 4000 satisfied customers and a strong focus on customer relationships, Jefferson Electric is positioned as a relevant player in the renewable energy sector.


6. White Construction LLC, a MasTec Company

  • Website: whiteconstruction.com
  • Ownership type: Family Owned
  • Headquarters: Clinton, Indiana, United States (USA)
  • Employee distribution: United States (USA) 98%, Canada 2%
  • Founded year: 1947
  • Headcount: 1001-5000
  • LinkedIn: white-construction-llc

White Construction LLC, a MasTec Company, is a family-owned construction firm based in Clinton, Indiana, with a history dating back to 1947. Initially starting as a trucking and excavating company, White Construction has evolved into a significant player in the renewable energy sector. The company specializes in infrastructure projects, particularly in wind and solar energy, providing a comprehensive range of services that include project management, site preparation, and the construction of energy facilities. They have successfully completed over 9,200 MW of renewable energy projects, working primarily with utility companies and renewable energy developers. Their expertise in heavy civil construction allows them to tackle complex projects efficiently, ensuring timely delivery and adherence to safety standards. As part of the MasTec family, White Construction leverages additional resources and capabilities to enhance their service offerings in the renewable energy market.


7. Indianapolis Power & Light Company

  • Website: iplpower.com
  • Ownership type: Private
  • Headquarters: Indianapolis, Indiana, United States (USA)
  • Founded year: 1927
  • Headcount: 1001-5000
  • LinkedIn: iplpower

Indianapolis Power & Light Company, also known as AES Indiana, is an energy utility provider based in Indianapolis, Indiana. Founded in 1927, the company serves both residential and business customers, delivering electricity services across the region. AES Indiana is dedicated to enhancing customer experience through various initiatives, including energy efficiency programs and smart grid technology. The company is actively involved in promoting renewable energy options, offering customers the chance to enroll in green power programs that support environmentally friendly energy generation. Additionally, AES Indiana invests in community programs and sustainability efforts, reflecting its commitment to responsible energy practices and community engagement.


8. Huston Electric, Inc

  • Website: hustonelectric.com
  • Ownership type: Family Owned
  • Headquarters: Kokomo, Indiana, United States (USA)
  • Employee distribution: United States (USA) 93%, Lebanon 3%, China 3%
  • Founded year: 1939
  • Headcount: 501-1000
  • LinkedIn: huston-electric-inc

Huston Electric, Inc., founded in 1939 and based in Kokomo, Indiana, is a family-owned electrical contracting firm that specializes in a wide array of electrical services. The company operates across residential, commercial, and industrial sectors, providing solutions that include electrical installations, maintenance, and specialized services. Notably, Huston Electric has a dedicated division for solar energy, Huston Solar, which focuses on delivering tailored solar solutions to enhance energy efficiency and operational savings. Additionally, they offer electric vehicle (EV) charging solutions, reflecting their commitment to sustainable energy practices. With a workforce of approximately 177 employees, Huston Electric has established itself as a significant player in the electrical contracting industry, emphasizing safety, compliance, and innovation in all its projects.


9. Auxilius Renewable Energy

  • Website: auxiliusre.com
  • Ownership type: Private
  • Headquarters: Boswell, Indiana, United States (USA)
  • Employee distribution: United States (USA) 100%
  • Founded year: 2013
  • Headcount: 11-50
  • LinkedIn: auxiliusre

Auxilius Renewable Energy, founded in 2013 and based in Boswell, Indiana, is a private company dedicated to providing maintenance and support services for wind turbines. With a team of 23 employees, Auxilius specializes in a range of services that include Global Wind Organisation (GWO) training, inspections, and repairs tailored for wind farm owners and operators. The company prides itself on its hands-on approach and commitment to ensuring the efficient operation of wind energy assets. Auxilius has established partnerships with recognized industry players such as AMSoil and Power Climber, enhancing its service offerings. The company is strategically located near a significant concentration of wind turbines, allowing for quick response times to service requests. Their focus on quality and customer service positions them as a valuable player in the renewable energy sector, particularly in the wind energy niche.


10. DANNAR, Inc.

  • Website: dannar.us.com
  • Ownership type: Private
  • Headquarters: Muncie, Indiana, United States (USA)
  • Employee distribution: United States (USA) 100%
  • Founded year: 2011
  • Headcount: 11-50
  • LinkedIn: dd-dannar-llc

DANNAR, Inc., based in Muncie, Indiana, specializes in the manufacturing of mobile power stations and heavy-duty electric work vehicles. Founded in 2011, the company aims to transform mobile work and energy systems through intelligent technology. Their flagship product, the DANNAR Mobile Power Station (MPS), serves as a versatile platform for various applications, including construction and emergency response. These vehicles are designed to operate with zero emissions, significantly reducing the carbon footprint associated with traditional heavy machinery. DANNAR's innovative approach allows for the integration of renewable energy sources, enhancing energy resilience and efficiency in operations. The company is dedicated to improving community air quality and operational productivity through its electric solutions.


11. Solution Group

  • Website: solutionmgt.com
  • Ownership type: Private
  • Headquarters: Indianapolis, Indiana, United States (USA)
  • Employee distribution: United States (USA) 100%
  • Founded year: 2010
  • Headcount: 51-200
  • LinkedIn: solutionmgt

Solution Group, based in Indianapolis, Indiana, is a private company founded in 2010. With a workforce of around 51-200 employees, they specialize in renewable energy and wastewater treatment solutions. The company provides a range of services, including wastewater treatment, monitoring and optimization, and renewable energy generation. Their clientele spans food manufacturing, agriculture, and municipal sectors, all seeking to enhance waste management and reduce operational costs through innovative energy solutions. Notably, Solution Group has successfully generated 3.6 million kilowatts of renewable energy in 2018, showcasing their impact in the renewable energy field. Their approach integrates advanced technologies and expertise to deliver effective solutions that not only benefit their clients but also contribute positively to environmental sustainability.


12. Alpha Engineering, Inc

  • Website: alphaeng.us
  • Ownership type: Private
  • Headquarters: Indianapolis, Indiana, United States (USA)
  • Employee distribution: United States (USA) 100%
  • Founded year: 1979
  • Headcount: 11-50
  • LinkedIn: alpha-engineering-inc

Alpha Engineering, Inc. is an engineering firm based in Indianapolis, Indiana, founded in 1979. With a workforce of 11-50 employees, the company specializes in power and energy solutions, particularly in the renewable energy sector. They provide a range of services including renewable energy design, substation engineering, and system planning. Their expertise extends to the interconnection of distributed energy resources, catering to both private companies and public utilities. Alpha Engineering is dedicated to helping clients navigate the complexities of energy systems, ensuring that their solutions are tailored to meet specific needs. Their clientele includes electric utilities and industrial clients, reflecting their capability to handle projects of varying scales. The firm emphasizes a collaborative approach, working closely with clients to develop effective and sustainable energy solutions.


13. Collier's Heating & Air Conditioning


Collier's Heating & Air Conditioning, based in Warsaw, Indiana, has been operational since 1987. The company specializes in heating, air conditioning, and indoor air quality solutions for both residential and commercial clients. With a workforce of 11 to 50 employees, Collier's has built a reputation for providing reliable installation, maintenance, and repair services. Notably, the company has expanded its offerings to include geothermal and solar energy solutions, reflecting a commitment to energy efficiency and sustainability. Their solar services encompass the installation of solar panels and solar attic fans, while their geothermal services focus on harnessing the earth's natural energy for heating and cooling. This integration of renewable energy technologies into their service portfolio highlights their role in promoting energy-efficient solutions in Northern Indiana.


14. WaterFurnace International

  • Website: waterfurnace.com
  • Ownership type: Corporate
  • Headquarters: Fort Wayne, Indiana, United States (USA)
  • Employee distribution: United States (USA) 99%, Other 1%
  • Latest funding: June 2014
  • Founded year: 1983
  • Headcount: 201-500
  • LinkedIn: waterfurnace-international

WaterFurnace International, based in Fort Wayne, Indiana, has been a prominent player in the geothermal heating and cooling industry since its founding in 1983. The company specializes in providing geothermal heat pumps and energy efficiency products tailored for both residential and commercial applications. WaterFurnace emphasizes the cost-saving benefits and comfort that their systems offer, making them an attractive option for energy-conscious consumers. With a workforce of approximately 227 employees, the company operates primarily in the United States, with a small international presence. WaterFurnace is dedicated to educating customers about the advantages of geothermal technology, including its potential for significant energy savings and reduced environmental impact. Their products are designed to harness the earth's natural energy, contributing to a more sustainable future.


15. Reynolds Construction, LLC

  • Website: reynoldscon.com
  • Ownership type: Private
  • Headquarters: Orleans, Indiana, United States (USA)
  • Employee distribution: United States (USA) 95%, Nigeria 2%, Tanzania 2%
  • Founded year: 2017
  • Headcount: 201-500
  • LinkedIn: reynoldsconstructionllc

Reynolds Construction, LLC, based in Orleans, Indiana, is a construction company that focuses on water, wastewater, and renewable energy infrastructure. Founded in 2017, the company has roots tracing back to the mid-1930s, showcasing a long history in the construction industry. Reynolds specializes in constructing water treatment plants, wastewater treatment facilities, and pipelines, while also offering services in renewable energy through the design and construction of biogas facilities. These facilities are crucial for capturing methane gas, an important renewable energy resource. The company prides itself on self-performing a significant portion of its projects, which enhances quality control and efficiency. With a workforce of approximately 250 employees, Reynolds has successfully completed numerous projects, contributing to the sustainability of water and energy resources in the communities they serve.


16. Primary Energy Recycling Corp.

  • Website: primaryenergy.com
  • Ownership type: Corporate
  • Headquarters: Hammond, Indiana, United States (USA)
  • Employee distribution: United States (USA) 100%
  • Latest funding: $380.0M, August 2006
  • Founded year: 1996
  • Headcount: 11-50
  • LinkedIn: primary-energy-recycling-corp.

Primary Energy Recycling Corp., based in Hammond, Indiana, is an energy solutions provider that specializes in energy recycling and efficiency for industrial clients. Founded in 1996, the company captures waste energy from industrial processes, transforming it into reliable and cost-effective energy solutions. Their primary focus is on the manufacturing sector, where they help clients reduce energy costs and improve operational efficiency. Primary Energy operates several projects that utilize combined heat and power (CHP) technology, which recovers waste heat to generate electricity and thermal energy. This not only enhances energy productivity but also significantly reduces emissions. The company has a combined electrical generating capacity of 298 megawatts and a steam generating capacity of 1.8 million pounds per hour. In 2021, Primary Energy was fully acquired by SDCL Energy Efficiency Income Trust, which underscores its commitment to sustainable energy practices and operational excellence.


17. Wabash Valley Resources

  • Website: wvresc.com
  • Ownership type: Private
  • Headquarters: West Terre Haute, Indiana, United States (USA)
  • Employee distribution: United States (USA) 100%
  • Latest funding: Other (Debt), $1.6B, September 2024
  • Founded year: 2016
  • Headcount: 11-50
  • LinkedIn: wabash-valley-resources-llc

Wabash Valley Resources, founded in 2016 and based in West Terre Haute, Indiana, is a private company dedicated to clean energy and fertilizer manufacturing. The firm specializes in producing low-carbon intensity anhydrous ammonia fertilizer, primarily serving American farmers in the Corn Belt. By employing advanced carbon capture technology, Wabash Valley Resources aims to minimize the environmental impact of fertilizer production. Their facility is designed to generate ammonia through a zero-carbon process, capturing and storing approximately 1.65 million tons of CO2 annually. This innovative approach not only supports agricultural productivity but also contributes to climate goals by reducing carbon emissions. The company has recently secured significant funding, including a $1.56 billion loan commitment from the Department of Energy, to support the development of their facility, which is expected to play a pivotal role in enhancing domestic fertilizer supply and promoting sustainable farming practices.


18. StarPlus Energy

  • Website: starplusenergyus.com
  • Ownership type: Private
  • Headquarters: Kokomo, Indiana, United States (USA)
  • Employee distribution: United States (USA) 100%
  • Latest funding: Other (Debt), $7.5B, December 2024
  • Founded year: 2022
  • Headcount: 501-1000
  • LinkedIn: starplus-energy

StarPlus Energy, established in 2022, is a joint venture between Stellantis and Samsung SDI, located in Kokomo, Indiana. The company is dedicated to the manufacturing of electric vehicle batteries, addressing the increasing demand for sustainable energy solutions in the automotive industry. Currently, they are constructing a significant battery plant, which is expected to be completed by 2025. This facility will not only create approximately 1,400 jobs but also contribute to the local economy and infrastructure. With a recent funding amount of $7.54 billion, StarPlus Energy is positioned to innovate and enhance battery technology, focusing on high-performance lithium-ion batteries that are essential for electric vehicles. Their commitment to sustainability and electrification aligns with the global shift towards renewable energy sources, making them a relevant player in this evolving industry.


19. Midwestern Electric, LLC.

  • Website: midwesternelectricinc.com
  • Ownership type: Private Equity
  • Headquarters: East Chicago, Indiana, United States (USA)
  • Employee distribution: United States (USA) 100%
  • Latest funding: November 2021
  • Founded year: 1971
  • Headcount: 51-200
  • LinkedIn: midwestern-electric-inc.

Midwestern Electric, LLC. is an electrical contractor based in East Chicago, Indiana, with a history dating back to 1971. The company specializes in commercial and industrial electrical services, traffic signal maintenance, and renewable energy solutions. With a workforce of approximately 48 employees, Midwestern Electric serves municipalities and businesses across Indiana and the Chicago area. Their services extend to the construction of solar farms, wind farms, and the installation of electric vehicle charging stations, showcasing their commitment to renewable energy. The company prides itself on safety, reliability, and quality workmanship, making it a trusted partner for various infrastructure projects. Midwestern Electric operates as a licensed union contractor, emphasizing the importance of skilled labor in delivering their services.



Renewable Energy Insights: Key Companies in Indiana


CompanyHeadquarterSizeFoundedOwnership
Energy Systems Group (ESG)Newburgh, Indiana, United States (USA)201-5001994Private Equity
IEA Renewable EnergyIndianapolis, Indiana, United States (USA)1001-50001977Private
IEA Constructors LLC, a MasTec CompanyIndianapolis, Indiana, United States (USA)1001-50001977Private
Ohio Valley Electric, INCNewburgh, Indiana, United States (USA)1-101997Private
Jefferson ElectricSpeedway, Indiana, United States (USA)11-502011Private
White Construction LLC, a MasTec CompanyClinton, Indiana, United States (USA)1001-50001947Family Owned
Indianapolis Power & Light CompanyIndianapolis, Indiana, United States (USA)1001-50001927Private
Huston Electric, IncKokomo, Indiana, United States (USA)501-10001939Family Owned
Auxilius Renewable EnergyBoswell, Indiana, United States (USA)11-502013Private
DANNAR, Inc.Muncie, Indiana, United States (USA)11-502011Private
Solution GroupIndianapolis, Indiana, United States (USA)51-2002010Private
Alpha Engineering, IncIndianapolis, Indiana, United States (USA)11-501979Private
Collier's Heating & Air ConditioningWarsaw, Indiana, United States (USA)11-501987Private
WaterFurnace InternationalFort Wayne, Indiana, United States (USA)201-5001983Corporate
Reynolds Construction, LLCOrleans, Indiana, United States (USA)201-5002017Private
Primary Energy Recycling Corp.Hammond, Indiana, United States (USA)11-501996Corporate
Wabash Valley ResourcesWest Terre Haute, Indiana, United States (USA)11-502016Private
StarPlus EnergyKokomo, Indiana, United States (USA)501-10002022Private
Midwestern Electric, LLC.East Chicago, Indiana, United States (USA)51-2001971Private Equity


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