The most powerful solar on the planet.

With San Francisco at heart.

Luminalt is a locally owned solar and energy storage installation company, founded in San Francisco in 2004 by wife and husband team Jeanine and Noel Cotter. From its earliest days, the company has been at the forefront of the California solar industry. Luminalt stands apart for its focus on customer satisfaction, community involvement and solar advocacy. Our experienced staff specialize in designing creative rooftop solutions for San Francisco’s dense building challenges. Our community service ethic shines through in the multiple solar installations for Bay Area nonprofit organizations as well as locally owned businesses. When you are ready to go solar, talk to the local solar experts.

Award-Winning Work

Luminalt has been honored with multiple awards, from customer service excellence to our continued commitment and advocacy to environmental sustainability.

In fact, Luminalt Co-Founder and Chief Technology Officer Noel Cotter is a long-time solar expert who writes the exam questions for the California State Licensing Board’s solar exam (C-46).


Our founder Noel’s first solar installation. It was a 50 kW system built in the early 80s on a small island off of the coast of Ireland.

Our Philosophy & Values

Luminalt’s philosophy guides every decision we make. At the core of that philosophy are our company values:

We install superior, high-performance solar systems that optimize efficiency and aesthetics.

We provide the best customer service in the industry.

We care for and respect our planet, our customers and ourselves.

We take action in our community and our environment through local, sustainable economic growth and innovative energy solutions.

“Never have I encountered a firm as efficient, honest, capable and customer-focused as Luminalt’s…

All I can say is, Bravo!”

San Francisco Homeowner

“There are several solar companies serving the city of San Francisco, but I chose Luminalt mainly because of their customer reviews…

Luminalt is an honest company with outstanding customer service, from CEO to office staff.”

San Francisco Homeowner

“Luminalt impressed us because…their people are uniformly wonderful. We also liked engaging a woman-owned engineering firm who assigned a female engineer and project manager to our work.”

Galen W.

“The process was very professional, with Luminalt handling all the permits and paperwork, including our SF GoSolar rebate.”

Philip H.

“The crew that ran the installation was amazing. Polite, professional and efficient. The crew leader, Pam, was an absolute rockstar.”

Ashley K.

“Everyone was polite and knowledgeable, from our first quote through final inspection.”

Leigh Ann P.

“Since it’s been turned on, we have had net negative power consumption every month…That’s pretty awesome.”

Shabbir S.