Helleniq Energy is one of the pioneering energy groups in South East Europe, with activities spanning across the energy value chain and a presence in six countries. The Group’s main activities include Refining, Supply, and Trading of petroleum and petrochemical products, Fuels Marketing both in Greece and internationally, Renewable Energy Sources, Power Generation & Trading, as well as Supply, Distribution, and Trading of Natural Gas.

Hind Rectifiers Ltd. has long-standing tradition and experience in developing, designing, manufacturing and marketing Power Semiconductor, Power Electronic Equipment and Railway Transportation Equipment.

Hitachi commits to helping achieve a sustainable world and people's well-being by utilizing their breadth of digital and green technologies. Since its founding in 1910, Hitachi has responded to the expectations of society and its customers through technology and innovation. They work to apply their expertise in information technology (IT), operational technology (OT), and a wide variety of products to advance social infrastructure systems.

Hoeller Electrolyzer was founded to develop, manufacture, and sell PEM-electrolysis-stacks which are needed by OEMs of systems that produce "green hydrogen"​, i.e. for storing regenerative energy in the form of hydrogen.

HoloBuilder, Inc. is a San Francisco-based construction technology company that designs, develops, and sells enterprise SaaS software. HoloBuilder offers reality-capturing solutions for progress documentation and construction project management.

Established in Taiwan in 1974, Hon Hai Technology Group (Foxconn) is the world’s largest electronics manufacturer. Foxconn is also the leading technological solution provider, and it continuously leverages its expertise in software and hardware to integrate its unique manufacturing systems with emerging technologies.

Honeywell is a Fortune 100 company that invents and manufactures technologies to address tough challenges linked to global macrotrends such as safety, security, and energy. With approximately 110,000 employees worldwide, including more than 19,000 engineers and scientists, it has an unrelenting focus on quality, delivery, value, and technology in everything it makes and does.

For more than one hundred years, Hooper Corporation has been full-service electric, power and mechanical contractor. They are proud of what they have built and those they have partnered with.

The purpose of the Sustainable Energy and Environment Coalition is to advance policies that promote clean energy innovation and domestic manufacturing, develop renewable energy resources, and create family-sustaining clean jobs throughout the product supply chain.

Housing Solutions provide good quality, affordable homes to rent and buy across the South East of England. They own, manage and maintain more than 7,500 homes, across seven local authorities in and around the Maidenhead area. They offer a wide range of housing options, including affordable homes to rent, properties to buy under shared ownership, market rent properties and specialist accommodation for older people and people who need care.

Howe Electric began as a small electrical contracting business in 1949 in Fresno, California. It was incorporated ten years later as Howe Electric, Inc. They provide Electrical Engineering (Design), Electrical Engineering (Design-Build), BIM Solutions (Building Information Modeling), Design-Build Construction, Value Engineering, Construction Management, Net Zero Energy, Electrical Engineering and much more.

Hub Energy are an experienced, award winning, Yorkshire-based Solar PV and energy efficiency provider. Their projects cover domestic, commercial sector and large-scale investment projects from concept through to installation and aftercare. Hub Energy have a proven track record designing and installing Solar PV systems and have excellent customer satisfaction because of our customer first approach.

Huston Electric, Inc. is a privately owned, fourth-generation, full-service electrical contracting company with divisions specializing in design-build and service work. Huston Electric, Inc. has three locations, Kokomo, Westfield and Lafayette, IN, to better serve our customers. Huston Electric, has three other Divisions, Huston Sign & Services, Huston Technologies and Huston Generator and Compressors.

Hydrogen Optimized is a Hydrogen Technology focused project company. They develop and implement projects for clients and partners using their innovative hydrogen capabilities. They work with clients and partners to move projects forward through conceptualization, commercialization and scaling in the market.

Hyundai Corporation provides customers with products and services under the optimum condition required by customers by developing various heavy chemical industrial products such as ships, machines, plants, automobiles, steel, metal, chemicals, electric and electronic products.

i-DE Redes Eléctricas Inteligentes SAU is located in Bilbao, Spain and is part of the Electric Power Generation, Transmission and Distribution Industry. They company has 3,378 employees at this location and generates US$ 2.29 billion in sales on average per year.

Iberdrola is a global energy leader and the number one producer of wind power, and one of the world's biggest electricity utilities, in terms of market capitalization. They have brought the energy transition forward two decades to combat climate change and provide a clean, reliable and smart business model.

With more than 180 years of history, Iberdrola SA is currently a global energy leader, a major wind power producer and one of the largest electricity companies in the world in terms of stock market capitalization. They have been committed to clean energy for more than 20 years with the objective of exceeding 52,000 MW of renewable capacity by 2025.

iChoosr is the owner of Solar Together and a group-buying specialist in this field, who cooperates with participating local authorities to deliver the scheme. Solar Together is a unique group-buying scheme for solar photovoltaic (PV) panels and battery storage. This scheme will make solar PV and batteries more accessible and more affordable for a great number of people.

Boise, Idaho-based IDACORP is a holding company comprised of Idaho Power Company, a regulated electric utility; IDACORP Financial, a holder of affordable housing projects and other real estate investments; and Ida-West Energy, an operator of small hydroelectric generation projects that satisfy the requirements of the Public Utility Regulatory Policies Act of 1978.

The Illinois Power Agency exists to serve the people of Illinois by overseeing the electricity planning and procurement processes for residential and small commercial customers of Ameren, ComEd, and MidAmerican. It also manages the implementation of the Illinois Renewable Portfolio Standard.

In-Charge Energy is on the frontlines of large-scale emissions reduction, accelerating the electrification of the transportation industry – one commercial fleet at a time. With end-to-end, turnkey solutions for commercial EV infrastructure projects,

Ineco Energy was created to accelerate the deployment of sustainable energy solutions to fight climate change and protect the planet while saving customers money by reducing their energy bills. The company is passionate about educating the current and future leaders in understanding the delivery of real environmental benefits.

innogy's business is focused on the supply of natural gas, electricity and heat to customers, the combined production of heat and electricity in heating plants and solutions for clean mobility.

Innovative Sensor Technology IST AG is one of the manufacturers of physical, chemical and biological sensors. Founded in 1991, the company is headquartered in Ebnat-Kappel, Switzerland, and employs about 500 people worldwide.

Insight EDA provides software that fills an unmet need for a worldwide customer base. The demand for electronic devices continues to increase globally. Manufacturers are forced to squeeze both performance and battery life as they compete with each other to create the "next best thing".

The Institute of Thin Films, Sensors and Imaging (ITFSI) is a research institute at the University of the West of Scotland, founded by Professor Des Gibson in September 2014. ITFSI specializes in thin films for various applications including medical devices, sensors, engineering, optics, electronic devices, and photonics.

Intelux Electronics Private Limited is a pioneer in Energy Saving Products and solutions. They are the World-Class manufacturer of Power Electronic and Lighting Product. They have effectively serviced our customers to save energy with quality output of Lighting and power for two decades.

Intermountain Electric, Inc. (IME), a Colorado corporation, has been committed to quality for 70 years. Since its formation in 1946, IME has established itself as a premier electrical contractor. With a vast array of resources, IME. provides the customers and clients with a trusted avenue for all electrical construction needs.

Intermountain Power Agency (IPA) is located in the Great Basin region of western Utah, USA. They generate an average of more than 13 million megawatt hours of energy each year from their two coal-fired units. The energy is delivered over the project’s AC and DC transmission systems to 35 participants in the project that principally serve Utah and Southern California, USA.