Enphase Energy, Inc., together with its subsidiaries, designs, develops, manufactures, and sells home energy solutions for the solar photovoltaic industry in the United States and internationally. The company offers semiconductor-based microinverter, which converts energy at the individual solar module level and combines with its proprietary networking and software technologies to provide energy monitoring and control. It also provides microinverter units and related accessories, an IQ gateway; IQ batteries; the cloud-based Enlighten monitoring service; storage solutions; and electric vehicle charging solutions, as well as design, proposal, permitting, and lead generation services. The company sells its solutions to solar distributors; and directly to large installers, original equipment manufacturers, strategic partners, and homeowners, as well as through its legacy product upgrade program or online store. Enphase Energy, Inc. was incorporated in 2006 and is headquartered in Fremont, California.

Plug Power Inc. develops hydrogen and fuel cell product solutions in North America, Europe, Asia, and internationally. The company offers GenDrive, a hydrogen-fueled proton exchange membrane (PEM) fuel cell system that provides power to material handling electric vehicles; GenSure, a stationary fuel cell solution that offers modular PEM fuel cell power to support the backup and grid-support power requirements of the telecommunications, transportation, and utility sectors; ProGen, a fuel cell stack and engine technology used in mobility and stationary fuel cell systems, and as engines in electric delivery vans; GenFuel, a liquid hydrogen fueling delivery, generation, storage, and dispensing system; GenCare, an ongoing Internet of Things-based maintenance and on-site service program for GenDrive fuel cell systems, GenSure fuel cell systems, GenFuel hydrogen storage and dispensing products, and ProGen fuel cell engines; and GenKey, an integrated turn-key solution for transitioning to fuel cell power. It also provides electrolyzers, a hydrogen generator for clean hydrogen production; liquefaction systems that provides liquid hydrogen to customers; cryogenic equipment for the distribution of liquified hydrogen, oxygen, argon, nitrogen and other cryogenic gases, including trailers and mobile storage equipment; and liquid hydrogen, an alternative fuel to fossil-based energy. The company sells its products through a direct product sales force, original equipment manufacturers, and dealer networks. Plug Power Inc. was incorporated in 1997 and is headquartered in Latham, New York.

Ballard Power Systems Inc. engages in the design, development, manufacture, sale, and service of proton exchange membrane (PEM) fuel cell products. The company offers its products for power product comprising for bus, truck, rail, marine, stationary, and emerging market, such as material handling, off-road, and other applications. It also engages in the delivery of services, including technology solutions, after sales services, and training; and provision of engineering services, product and systems integration services, and related technology transfer for a variety of PEM fuel cell applications. It operates in the United States, Germany, Canada, China, Poland, the United Kingdom, the Netherlands, France, Denmark, Belgium, India, Taiwan, Spain, Norway, Australia, Japan, and internationally. The company has a strategic alliance with Linamar Corporation for the co-development and sale of fuel cell powertrains and components for class 1 and 2 vehicles in North America and Europe. Ballard Power Systems Inc. was founded in 1979 and is headquartered in Burnaby, Canada.

FuelCell Energy, Inc., together with its subsidiaries, manufactures and sells stationary fuel cell and electrolysis platforms that decarbonize power and produce hydrogen. The company provides various configurations and applications of its platform, including on-site power, utility grid support, and microgrid, as well as distributed hydrogen; solid oxide-based electrolysis; solutions for long duration hydrogen-based energy storage and electrolysis technology; and carbon capture, separation, and utilization systems. It also offers technology to produce electricity, heat, hydrogen, and water. In addition, the company provides turn-key solutions, including development, engineering, procurement, construction, interconnection, and operation services. It serves various markets, including utilities and independent power producers, industrial and process applications, education and health care, data centers and communication, wastewater treatment, government, commercial and hospitality, microgrids, manufacturing, industrial hydrogen, port, oil and gas, wind and solar projects, food and beverage, hydrogen for mobility and material handling, and hydrogen fuel for heat, as well as engineering, procurement, and construction firms. The company primarily operates in the United States, South Korea, and Europe. FuelCell Energy, Inc. was founded in 1969 and is headquartered in Danbury, Connecticut.

Aemetis, Inc. operates as a renewable natural gas and renewable fuels company. It operates through three segments: California Ethanol, California Dairy Renewable Natural Gas, and India Biodiesel. The company focuses on the operation, acquisition, development, and commercialization of technologies to produce low and negative carbon intensity renewable fuels that replace fossil-based products. In addition, it produces and sells ethanol; and wet distillers grains, distillers corn oil, and condensed distillers solubles to dairies and feedlots as animal feed. Further, the company markets and supplies USP alcohol and hand sanitizer; and produces renewable natural gas, as well as distilled biodiesel from various vegetable oil and animal waste feedstocks. Additionally, it researches and develops conversion technologies using waste feedstocks to produce biofuels and biochemicals. Furthermore, it sells biodiesel primarily to government oil marketing companies. Aemetis, Inc. is headquartered in Cupertino, California.

Beam Global, a clean-technology innovation company, engages in the design, development, engineering, manufacture, and sale of renewably energized infrastructure products and battery solutions. Its product portfolio includes EV ARC (electric vehicle autonomous renewable charger), an infrastructure product that uses integrated solar power and battery storage to provide a mounting asset and a source of power for factory installed electric vehicle charging stations; Solar Tree DCFC, an off-grid, renewably energized, and single-column mounted smart generation and energy storage system to provide a 150kW DC fast charge to one or more electric vehicles, such as electric buses, heavy-duty vehicles, agricultural equipment, public transportation, and electric vehicles used in the construction industry; and EV ARC DCFC, a DC fast charging system for charging EVs. The company is also involved in the development of EV-Standard, a lamp standard, EV charging, and emergency power product that uses an existing streetlamp's foundation and a combination of solar, wind, grid connection, and onboard energy storage to provide curbside charging; and UAV ARC, an off-grid and renewably energized product and network used to charge aerial drone (UAV) fleets. It offers its solutions for electric vehicle (EV) charging infrastructure, energy storage, energy security, disaster preparedness, street lighting, telecommunications, energy infrastructure, and outdoor media and branding industries. The company was formerly known as Envision Solar International, Inc. and changed its name to Beam Global in September 2020. Beam Global was incorporated in 2006 and is headquartered in San Diego, California.

Clean Energy Technologies, Inc. designs, produces, and markets clean energy products and integrated solutions that focuses on energy efficiency and renewable energy in the United States. It operates through four segments: Clean Energy HRS and CETY Europe, CETY Renewables Waste to Energy Solutions, engineering and Manufacturing Business, and CETY HK. The company offers Clean Cycle, which generates electricity by recycling wasted heat produced in manufacturing, waste to energy, and power generation facilities. It also converts waste products created in manufacturing, agriculture, wastewater treatment plants, and other industries to electricity, renewable natural gas, hydrogen, and bio char. In addition, the company offers engineering, consulting, and project management solutions. Further, the company is involved in the sourcing and suppling of liquefied natural gas to industries and municipalities located in the southern part of Sichuan Province and portions of Yunnan Province. The company was formerly known as Probe Manufacturing, Inc. and changed its name to Clean Energy Technologies, Inc. in November 2015. Clean Energy Technologies, Inc. was founded in 1993 and is headquartered in Irvine, California. Clean Energy Technologies, Inc. is a subsidiary of MGW Investment I Ltd.

Polar Power, Inc. designs, manufactures, and sells direct current (DC) power generators, renewable energy, and cooling systems in the United States and internationally. The company offers DC base power systems, DC hybrid power systems, DC solar hybrid power systems, and mobile power systems. Its DC power systems are available in diesel, natural gas, LPG/propane, and renewable fuel formats. It serves customers in the telecommunications, military, commercial, industrial, and marine markets. In addition, the company sells its products through a direct sales force, and independent service providers and dealers. The company was formerly known as Polar Products, Inc. and changed its name to Polar Power, Inc. in October 1991. Polar Power, Inc. was incorporated in 1979 and is based in Gardena, California.