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

📍 San Diego, California
📅 May 18–21, 2026
🌐 cleanpower.org

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 over 400 exhibitors showcasing the latest technologies

• Network with utility companies, developers, and regulators

☀️ 2. RE+ (Renewable Energy Plus) 2026

📍 Anaheim, California
📅 September 21–24, 2026
🌐 re-plus.com

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 clean tech sector

• Educational sessions and policy briefings

• Strong industry–government collaboration

🚀 3. ARPA-E Energy Innovation Summit 2026

📍 Washington, D.C.
📅 March 2026 (Dates TBA)
🌐 arpa-e.energy.gov

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 featuring breakthrough innovations

• Networking with federal agencies and investors

• Deep dive into energy innovation policy and funding

💼 4. NREL Industry Growth Forum (IGF) 2026

📍 Denver, Colorado
📅 April 2026 (TBD)
🌐 nrelforum.com

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

Best for:

• CleanTech entrepreneurs

• Energy investors and accelerators

• Government and DOE program officers

⚡ 5. Green Transportation Summit & Expo 2026 (GTSE)

📍 Seattle, Washington
📅 August 19–21, 2026
🌐 gtsummitexpo.com

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

Topics include:

• Hydrogen fueling infrastructure

• Zero-emission vehicle technology

• Charging station deployment

🔵 6. Hydrogen Americas Summit & Exhibition 2026

📍 Houston, Texas
📅 October 2026 (Exact Dates TBD)
🌐 hydrogenamericas.com

As hydrogen gains momentum in the U.S. energy mix, this summit provides a key platform to shape hydrogen policy, financing models, and global supply chains.

Audience:

• Energy executives

• Government policymakers

• Hydrogen startups and suppliers

📝 Tips for Attending Clean Energy Conferences in the USA

To get the most from your 2026 conference experience:

• Plan early: Book hotels and flights as early as possible—many events sell out fast.

• Submit proposals: Many events welcome paper submissions or startup pitches.

• Use LinkedIn: Connect with speakers and attendees in advance.

• Follow updates: Subscribe to email alerts and blogs like ours for speaker lists and agendas.

📌 Final Thoughts

With the clean energy revolution in full swing, 2026 is your year to be part of the momentum. These events provide the perfect mix of knowledge sharing, networking, and innovation across solar, wind, hydrogen, and smart energy systems. Whether you’re a student, executive, policymaker, or founder, there’s a conference here for you.

👉 Keep following renewableenergyconference.org/blog for updates on global energy events, speaker interviews, and travel insights.