Best Clean Energy Conferences in USA – 2026 Edition

As the United States accelerates its clean energy transition, 2026 is shaping up to be a pivotal year for energy professionals, researchers, policymakers, and sustainable technology companies. Whether you’re working in solar, wind, hydrogen, energy storage, or decarbonization policy, the USA offers some of the world’s most impactful clean energy conferences to connect, innovate, and lead the path toward net-zero goals.

In this article, we spotlight the best clean energy conferences in the USA for 2026, organized by region, focus area, and participation opportunities.

Top Clean Energy Conferences in the USA – 2026

1. Cleanpower 2026 – American Clean Power Association

Location: San Diego, California
Dates: May 18–21, 2026

Cleanpower is the largest clean energy event in the United States, hosted by the American Clean Power Association (ACP). It brings together over 10,000 energy professionals across the wind, solar, and storage industries.

Why Attend:

• Hear from top industry leaders

• Meet 400+ exhibitors showcasing the latest technologies

• Network with utility companies, developers, and regulators

2. RE+ (Renewable Energy Plus) 2026

Location: Anaheim, California
Dates: September 21–24, 2026

Formerly known as Solar Power International (SPI), RE+ is now North America’s largest energy trade show and conference focused on solar, battery storage, microgrids, and smart energy systems.

Highlights:

• 1,000+ exhibitors from the cleantech sector

• Educational sessions and policy briefings

• Strong industry–government collaboration

3. ARPA-E Energy Innovation Summit 2026

Location: Washington, D.C.
Dates: March 2026 (TBA)

Organized by the U.S. Department of Energy’s ARPA-E, this summit focuses on high-impact R&D and commercialization of transformational energy technologies.

Key Features:

• Tech showcase of breakthrough innovations

• Networking with federal agencies and investors

• Insights into energy innovation policy and funding

4. NREL Industry Growth Forum (IGF) 2026

Location: Denver, Colorado
Dates: April 2026 (TBD)

Hosted by the National Renewable Energy Laboratory, IGF is the premier cleantech investor event in the U.S. It connects high-potential startups with VCs and energy-focused funds.

Best For:

• CleanTech entrepreneurs

• Energy investors and accelerators

• DOE program officers

5. Green Transportation Summit & Expo 2026 (GTSE)

Location: Seattle, Washington
Dates: August 19–21, 2026

With the growth of EV and hydrogen mobility sectors, GTSE is where fleet managers, tech developers, and municipal planners explore sustainable transportation.

Topics Include:

• Hydrogen fueling infrastructure

• Zero-emission vehicle technology

• Charging station deployment

6. Hydrogen Americas Summit & Exhibition 2026

Location: Houston, Texas
Dates: October 2026 (Exact Dates TBD)

As hydrogen gains momentum in the U.S. energy mix, this summit is key to shaping hydrogen policy, financing, and global supply chains.

Audience:

• Energy executives

• Policymakers

• Hydrogen startups and suppliers

Tips for Attending Clean Energy Conferences in the USA

• Plan early: Book travel and accommodation months ahead

• Submit proposals: Take part in speaker calls or pitch sessions

• Network smart: Use LinkedIn to connect with attendees

• Stay informed: Follow blogs and newsletters for updates

Final Thoughts

With the clean energy revolution gaining speed, 2026 offers unmatched opportunities to engage with leading minds in sustainability. Whether you’re an entrepreneur, researcher, policymaker, or investor, these events provide critical insight, exposure, and collaboration potential.

Note: The information provided in this article is for informational purposes only. Dates, venues, and event details are subject to change by the respective organizers. Readers are encouraged to verify the latest updates directly with the official conference organizers before making any travel or registration arrangements. This guide does not imply endorsement of any specific event or organization.