Sun Day Houston 2025 will bring together community members, advocates, and experts to celebrate the widespread adoption of solar and wind power and promote clean energy solutions across Texas. The event will take place Sunday, Sept. 21, from 2-4:30 p.m. at Christ the King Lutheran Church, 2353 Rice Blvd., Houston, TX 77005.

The celebration is part of the larger Sun Day initiative — a nationwide and international movement hosting more than 100 events worldwide. Learn more at sunday.earth.

Event Highlights

Attendees can enjoy an afternoon filled with inspirational speakers, educational workshops, interactive exhibits, and live demonstrations focused on climate solutions and renewable energy adoption. Activities include:

  • Featured speakers at 2 p.m.

  • Hands-on workshops:

    • 3 p.m. — Rain Barrels for the Houston Area Community

    • 3:30 p.m. — Tips & Tricks for Going Solar

    • 4 p.m. — Welcoming the Energy Transition

  • Voter Registration Booth (2–3 p.m.)

  • Mobile solar and battery storage demos

  • Electric vehicle show-and-tell

  • Family-friendly activities, food, and live music

Attendees can purchase rain barrels at the event, but supplies are limited — pre-reserve yours at galvbay.org/events. For planning purposes, registration for Sun Day Houston is encouraged: Register at actionnetwork.org/events/sun-day-houston.

Featured Speakers

  • Daniel Cohan, Ph.D. — Professor of Civil & Environmental Engineering at Rice University. Dr. Cohan will discuss the science of renewable energy, its role in ERCOT and the U.S. energy grid, and his personal experience with rooftop solar and electric vehicles.

  • Andrea Oyuela — Manager, Harris County Office of Administration, Sustainability Division. Oyuela will highlight the Harris County Solar for All program and ongoing initiatives to expand equitable access to clean energy.

Workshop DetailsRain Barrels for the Houston Area Community

Hosted by Galveston Bay Foundation, this session explains the benefits of rainwater collection and demonstrates proper barrel installation to reduce flooding and conserve water. Registration includes one rain barrel, connector kit, and installation training. Reserve early as supplies are limited at galvbay.org/events.

Tips & Tricks for Going Solar

Led by Sophy Ashworth, a long-time solar homeowner and volunteer with Solar United Neighbors (SUN), this workshop will guide participants through making smart solar investments, avoiding scams, and advocating for solar rights. Register at galvbay.org/events.

Welcoming the Energy Transition

Presented by Nan Hildreth, this workshop explores how clean energy is transforming global power generation. Participants will learn about cost trends, growth data, and projections for a fossil-free future.

Why It Matters

“Solar and wind power have become the most affordable sources of new electricity generation in Texas and worldwide, while in Houston—a city long shaped by the hydrocarbon industry—misinformation about the cost-effectiveness and reliability of renewables persists,” said Gina Biekman, coordinator of the Third Act Houston Working Group.
“Sun Day Houston 2025 is about providing accurate, unbiased facts to the public, empowering our community to make informed choices for the future.”

Parking and Registration

If church parking is full, ample parking is available at the Rice University stadium lot on Greenbriar.
Reserve your spot and plan your visit actionnetwork.org/events/sun-day-houston.