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5 Best Solar Companies in California (2025 Top Solar Installers)

Our Expert Picks for 2025

UPDATED: August 2025
By Nextampere

Choosing the right solar installer is just as important as choosing the solar panels themselves. To help homeowners make the most of their investment, we evaluated dozens of California solar companies on the Nextampere Marketplace to highlight the top-rated installers for 2025.

With hundreds of providers across the state, it’s not easy to know which company you can truly rely on to handle your solar installation. That’s why our team of experts—along with feedback from California homeowners who’ve already gone solar—created this guide to the best solar companies in California.

When reviewing installers, we focus on companies that stand behind their work for the long term. After all, when you buy a solar system, you want the peace of mind that your installer will be there for the next 25 years to maintain and support it.

Here are our top recommendations for California solar installers in 2025:

The best California solar companies in 2025

Evolution Energy

Downey, CAEstablished 2009
We are an agile and nimble company with the expertise to design and build small and large scale solar electric and energy storage systems. We know all of our clients by name and treat them as members of the Evolution Energy family. We are excited to help you find freedom with your own source of clean, safe and reliable electricity. Call today and get started!

Sunergy

Fremont, CAEstablished 2015
Sunergy is the #1 Rated Enphase Platinum Installer in CA. We strive to give every customer a personal "Mom and Pop" feeling, all while having thousands of projects installed! The customer experience we provide is reflected in our reviews and is legendary. With a single point of contact, the process will feel smooth and seamless.

Solar Optimum

Benicia, CAEstablished 2008
Solar Optimum has been proudly named the 2024 and 2025 Installer of the Year by Nextampere. Since 2008, Solar Optimum continues to be the leader in supplying solar energy systems, back-up battery storage, roofing and EV charging stations for homeowners and businesses in California, Nevada, Arizona and Florida. We offer American-Made products from Mission Solar, Unirac, Enphase, Tesla Energy, GAF and CertainTeed.

Our team is made up of professionals that aim to protect the environment with the latest tec...

American Array Solar and Roofing

Livermore, CAEstablished 2012
At American Array Solar and Roofing, we bring over 80 years of combined experience to every project, putting our customers first every step of the way. Serving all of California and Arizona from five locations, we’re dedicated to delivering exceptional service and expertise across both states.

We proudly offer an industry-leading 40-year warranty, giving you peace of mind and unmatched value. As one of the top-rated solar and roofing companies, we’ve partnered with world-class manufacturers to provide t...

G C Electric Solar

Los Angeles, CAEstablished 2008
  • Nextampere Installer of the Year
  • Family Owned and Locally Operated
  • REC and Panasonic Certified Installer (25 Year Labor, Product, and Performance Warranty directly from the manufacturer of the Solar Panels)
  • Tesla Premier Installer
  • 5 star reviews on GOOGLE and across internet
  • Highest Quality of Workmanship
  • Unbeatable Pricing
  • $0 Down Financing Program
  • 30% Federal Tax Credit
  • Solar PV, Main Panel Upgrades, EV Charging Stations
  • As Seen on TV

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