Semper Solaris is El Cajon’s premier solar panel installation, residential roofing, heating and air conditioning contractor! We offer the best solar panels available on the market, we are local and Veteran owned. Oo-rah! We’d love to crunch the numbers on your power usage and determine the best way to install your solar panel system, Tesla Powerwall, energy-efficient roof and pair your solar panel system with a new, energy-efficient heating and air conditioning unit! As the top-rated San Diego County solar and roofing company, we are also proud to serve San Diego County residents in El Cajon, Santee, Scripps Ranch, La Mesa, Del Mar, Vista, Escondido, and more!