When the Sun Becomes Art: How E-Cacias Solar Trees Are Transforming Urban Spaces

Flat solar panels are yesterday’s news. In Milwaukee (USA), the E-Cacias solar trees prove that renewable energy can be not only efficient but also beautiful.

Developed by Solar Forma Design in collaboration with designer Samuel Wilkinson, these innovative structures combine technology, architecture, and inspiration from nature. Shaped like the African acacia trees of the savanna, their wide canopies of photovoltaic panels provide shade, lighting, and clean electricity — while leaving open ground space for people to enjoy.

☀️ Art That Generates Energy

E-Cacias have been installed at Wick Playfield, a public park in Milwaukee. Three “trees” power the park’s lighting system and electronic scoreboard. Their inverted-umbrella shape captures maximum sunlight while creating a cool shaded area beneath — an ideal place to walk, relax, or gather during hot summer days.

“We wanted to blend technology with human spaces — to create something functional yet aesthetic,” says Brian Graff, CEO of Solar Forma Design. “The African acacia was the perfect example — nature has already solved the challenge of capturing energy efficiently.”

⚡ Impressive Efficiency and Urban Value

Each E-Cacia costs between $135,000 and $140,000, but the company notes that U.S. federal and local incentive programs can significantly reduce the final cost for municipalities and schools.

Beyond power generation, these structures serve an educational mission — helping children and adults see how clean energy can be integrated into everyday life. Schoolyards, parks, and public spaces can all become open-air laboratories for learning about energy, climate, and sustainability.

🌆 The Future of Urban Energy

E-Cacias are already operating not only in Milwaukee but also in Sheboygan, Madison, Eau Claire, and even Houston. Their growing adoption shows how cities, schools, and cultural institutions are embracing solutions that make spaces both energy-efficient and people-friendly.

Unlike traditional ground-mounted panels, these “trees” require little land, do not obstruct movement, and harmoniously fit into urban architecture. Their concept is simple yet revolutionary: clean energy shouldn’t hide behind fences — it should live where people do.

💬 Design That Creates Place

“We wanted to show that aesthetics are not the enemy of engineering,” adds Brian Graff. “On the contrary — beauty helps people accept technology and make it part of their lives.”

These solar trees are becoming a new symbol of functional art — where architecture, ecology, and energy speak the same language of a sustainable future.

🌍 Global 100% RE Ukraine Supports Innovation for Sustainable Development

Global 100% RE Ukraine supports projects that unite technology, design, and responsibility. We believe that such initiatives shape the future — one where energy is created not only to power cities but also to inspire people.