Diablo Solar Services, Inc. is the East Bay Area's oldest and most experienced solar installation and service company, serving Contra Costa, Napa, Alameda, and Solano Counties since 1984. With over 22,000 solar systems installed, Diablo Solar offers a wide range of services, including photovoltaic (PV) solar-electric systems, swimming pool solar heating systems, hybrid combination CoolPV pool/PV systems, energy storage battery back-up systems, and domestic hot water (DHW) systems. Locally owned and operated, Diablo Solar has a combined 250 years of solar installation and service experience. Customers praise the company's expert advice, competitive pricing, and trouble-free installations, as well as its customer-oriented approach and experienced staff. Diablo Solar is highly recommended for its reliable and efficient solar services.
Diablo saved me from another solar company that tried to pressure me into a more expensive program for repair of my solar panel. Diablo saved me thousands of dollars with expert advice and a staff that got the job done quickly. I recommend Diablo Solar to anyone like me needing to replace a 14 year old failing inverter.
December 2025
Unlike many of their competitors, Diablo were willing to expand and existing solar system, and were able to maximally exploit existing equipment to cut the total cost. They did not try to oversell, communication was good, the price was competitive, and the installation was trouble-free.
December 2025
A one call for service and installation solar company. That’s a big plus.
