Top Solar Installers and Manufacturers in California: A 2025 Complete Guide
California’s rooftop solar market remains the nation’s largest, though it is undergoing a reset more than a retreat. In 2025, the U.S. added 1,106 MWdc of residential PV while California still led with 255 MWdc, despite softer volumes compared to past years.
Median residential quotes continue to hover around $2.48 per watt, reflecting stable but competitive pricing. At the same time, batteries have transitioned from a “nice-to-have” to a standard feature. 92% of companies now offer storage, and approximately 30% of new residential installations include batteries.
In this guide, you will get a ranked list of California’s top residential installers plus California-based manufacturers supplying modules, racking, and storage. Together, these names represent the trusted options that are shaping solar adoption in California.
9 Best Solar Companies in California for Residential & Commercial Installations
Below are the top-rated solar companies that offer installation and the best solar deals in California, partnering with reliable battery manufacturers.
1. Evolution Solar Energy
Based in Downey, Evolution Energy is an independent electrical contractor focused on residential solar and energy storage. The firm emphasizes code-compliant design, tightly managed installs, and long-term system performance, supervised by in-house electricians.
- Handles site assessment, engineering/design, permitting, construction, utility interconnection, and final inspection in-house.
- 25-year workmanship coverage on all installations (panels also carry 25-year manufacturer warranties).
- Enphase & SolarEdge for power electronics; Panasonic, Silfab, Qcells, and LG for modules; certified for Tesla Powerwall, Generac, and Enphase (Gold).
- You get a comprehensive project scope under one roof, encompassing solar and storage (ESS), panel upgrades, EV chargers, roofing, and ongoing maintenance.
For homeowners comparing the best solar companies in California, Evolution Energy offers a local, licensed residential solar installer with in-house electricians, complete permit-to-PTO execution, and long-horizon warranties.
2. Solar Optimum
Solar Optimum is a California-based solar company recognized for its system performance and battery-first design for residential homes. With a track record of award recognition and manufacturer-level certifications, they focus on building durable PV and storage systems that are engineered, monitored, and supported over the long term.
- Six 25-year protections, including a written production guarantee (panels, microinverters, racking, roof, workmanship, and performance) for homeowners.
- Proactive, cell-based monitoring with a dedicated fleet team that resolves under-production issues and isn’t dependent on home Wi-Fi.
- Selling property transfers warranties to new homeowners. Useful for solar resale value and buyer confidence.
Solar Optimum combines deep residential solar installer expertise with rare 25-year, six-point coverage and top-tier battery certifications. This makes it a reliable California solar company for homeowners seeking a current battery and PV module stack.
3. American Array Solar
American Array pairs home solar with roofing and battery storage altogether. Their approach includes engineered design, installation, and post-install support. If you are considering the best solar companies in California for PV and storage, and may also require roof work, this dual-scope model is a practical fit.
- Certified Tesla Powerwall Installer with additional storage options (Enphase Battery, Qcells) for Net Billing–friendly designs.
- A GAF Certified Plus contractor offering a roof warranty of up to 50 years. Useful when re-roofing with solar. Also comes with $0-down financing for eligible projects.
- Monitoring, maintenance, and repairs are offered after PTO.
A single contractor for panels, batteries, and roofing, backed by long warranties and battery certifications, makes American Array a straightforward choice among California solar installers.
4. GC Electric Solar
GC Electric Solar positions itself as a battery-ready, value-driven solar installer under California’s Net Billing reality. It pairs year-long warranties with manufacturer programs. Their team emphasizes pro mapping, end-to-end execution, and dedicated oversight.
- 25-year workmanship, 10-year leak-free roof-penetration coverage, and 25-year remote monitoring service included.
- REC ProTrust and Panasonic Premium installer designations. Labor + equipment backed by manufacturer warranties.
- Tesla Premier Installer with listed partnerships for Enphase and Generac, covering today’s common PV + storage choice.
Homeowners seeking a single point of accountability for their solar experience can benefit from the best solar deals in California offered by GC Electric Solar.
5. SUNERGY (Fremont)
SUNERGY leads with an Enphase-centric, battery-first philosophy. The company highlights its in-house crews, tight quality control, and comprehensive warranty posture
- 25-year warranties on panels, inverters, workmanship, and racking accompanied by a 15-year warranty on battery storage.
- Saves up to 20k in the first year for homeowners with no subcontractors needed.
- Platinum-level Enphase installer with a permit-to-PTO workflow.
- Offers solar installation loans powered by Sungage financing.
For homeowners shortlisting the best solar companies in California for PV + storage, SUNERGY pairs top-tier Enphase credentials with in-house delivery and extended reliability.
6. Citadel Roofing & Solar
Citadel is an integrated California solar company that delivers a unified solar installation experience, managing design, construction, and long-term care. They emphasize execution (permit-to-PTO) and dedicated post-install service, aligning with homeowner needs.
- 10-year workmanship, with manufacturer’s 25-year panel warranties.
- Their process outlines design through city/utility commissioning approval before energizing your system.
Among others, Citadel provides homeowners with a single accountable contractor for PV modules, storage, and roofing, backed by evident workmanship and equipment protection.
7. New Day Solar
New Day Solar leads with an education-first approach to residential solar installation and battery storage while keeping delivery in-house from scoping to support. It centers on practical guidance and high-scale projects, which is beneficial if you want a California solar company that handles all the work for you while you understand the finances.
- Quotes include site assessment, permitting, net-metering agreements, plus 25-year module & inverter warranties and a 10-year workmanship warranty.
- Offers maintenance programs and is listed as an Enphase Platinum Installer (cleaning, inspections, annual monitoring & reports).
- Pricing outlines loans and PPA options (which include maintenance services).
With New Day Solar, you have storage options for both new and existing solar systems. It combines high-tier battery models with clear warranties and genuine post-install care.
8. SunLux
SunLux is a lifecycle-focused residential solar installer. The company highlights a 25-year commitment across components and services, as well as active support for Tesla Powerwall 3 and Enphase-based systems.
- Lists 25-year system (panels/inverter/racking), parts & labor, production guarantee, monitoring, and tech support.
- The latest content available provides homeowners with lessons on how to use their solar monitoring app to track production/consumption.
- Provides a clear understanding of the distinction between performance (production) and product warranties, as well as 25-year expectations.
SunLux offers end-to-end solar services with an exceptional, documented 25-year production, parts/labor, and monitoring package, which includes an all-in-one execution roadmap.
9. Renova Energy
Renova Energy focuses on residential solar and backup support, offering self-managed roofing and ongoing maintenance services. It highlights certifications (Tesla, FranklinWH, Maxeon) and formal maintenance programs, signaling an extended period of support.
- Offers up to 30-year system coverage with an industry-leading 12-year workmanship/roof protection pledge.
- Delivers service after PTO with RenovaPLUS maintenance plans (cleaning, inspections, monitoring) and an always-on service & maintenance request channel.
- Renova provides roof surveys and roof work alongside solar, reducing handoffs when reroofing is needed.
Renova is among the top solar companies in California, combining battery certifications, in-house roofing, and formal maintenance programs designed for long-term growth and support.
Top 6 Solar Panel Manufacturers in California
Here is a list of the top solar module manufacturers that installers should be aware of:
1. Auxin Solar
Auxin Solar is a solar module manufacturer in California that manages production in San Jose. It supplies U.S.-made PV to installers that want faster logistics and a domestic supply chain. Auxin Solar positions itself as a practical solar manufacturing company for residential and small commercial projects statewide.
- The current line spans mono- and bifacial N-type modules in the ~435–600 W class, offering product and power warranties.
- Wattage options include 435 W, 480 W, 530 W, 580 W, and 600 W.
- Up to a 25-year product guarantee and 30-year linear power warranty.
- As a U.S. manufacturer, Auxin can support projects aiming for the IRA domestic content bonus, provided the criteria are met (the developer must certify per IRS rules).
Among the list of solar panel manufacturers in California, Auxin stands out from the others. It pairs U.S. manufacturing with bankable warranties, current N-type/bifacial options, and logistics advantages for California solar installers.
2. SunSpark Technology
SunSpark is a solar panel producer in Riverside, CA, providing solar installers with California-made mono and bifacial modules. It centers on all-black 108-cell, half-cut formats in the 400–415 W class, plus a bifacial 400–410 W variant with transparent backsheet.
- Each module is backed by 25-year linear power + 25-year workmanship coverage.
- Double-stage 100% EL inspection. Rated 5400 Pa snow / 2400 Pa wind with bifacial rear-side gain table access.
- 1000/1500 V system voltage options; −0.36%/°C Pmax temp coefficient; NOCT 43 °C ±2 °C.
For solar installers in California prioritizing electrical ratings and long warranties, SunSpark’s California-made modules offer straightforward engineering data and predictable logistics.
3. GAF Energy
GAF Energy builds Timberline Solar®: a nailable, roof-integrated PV shingle, out of its San Jose R&D/manufacturing center (with expanded U.S. capacity). The new ES 2 shingle delivers 57 W per shingle (≈~1.7 kW per roofing square at ~30 shingles), enabling faster installations and cleaner lines compared to rack-mounted panels.
- 57 W per energy shingle; 68 ¾″ × 16 ⅞″ × 1″, 10.1 lb; 2:12+ roof pitch; −40 °F to 122 °F ambient range.
- Approx. 30 shingles/square ≈ 1.7 kW. Handy for quick system sizing on reroofs.
- +23% energy efficiency compared to the prior generation, larger active area, and refined wiring/transition boxes for improved engineering speed and aesthetics.
GAF Energy is among the top solar manufacturing companies. It combines Timberline Solar® ES 2 with BIPV shingles, has recognized UL listings, and offers 2025-level output. It serves as an elegant alternative to racked modules on an asphalt roof.
4. NeoVolta
NeoVolta builds AC/DC-coupled home batteries that pair cleanly with California’s PV systems. The flagship NV14 combines a 7.68 kW hybrid inverter with a 14.4 kWh LiFePO₄ pack in a NEMA 3R cabinet. Add the NV24 to reach 24 kWh on one inverter.
- NV14 ≥70% of 14.4 kWh for 15 yrs / 6,000 cycles / 45 MWh (NV24: 9.6 kWh, 15 yrs / 6,000 cycles / 30 MWh).
- NV14 ships with a 7.68 kW, 120/240 V hybrid inverter (208 V, 3-phase capable), reducing the box count on installations.
- NV24 adds +9.6 kWh; the new NVPlus (10.2 kWh) carries a 15-year warranty for modular designs.
- Outdoor-rated cabinet & integrated sub-panel streamline backup-load wiring on retrofits.
NeoVolta is a California-based solar panel producer offering long, transparent 15-year terms and installer-friendly, UL-listed residential energy storage that scales from 14.4 to 24 kWh.
5. IronRidge
IronRidge supplies the XR Flush Mount ecosystem and FlashFoot2 attachments that many California crews standardize on for pitched-roof residential work. The platform is UL 2703 & UL 3741 listed, has a Class A fire rating, and includes a “free Design Assistant” that outputs engineering, BOMs, and permit-ready packs.
- 25-year product warranty across XR rails and system components.
- Three-tier sealing, tested to UL 441 rain and TAS 100-95 wind-driven rain, and installs with a single 7/16″ socket.
- Design → quote → permit → install, with shareable projects and distributor ordering.
It delivers racking that’s 25-year warranted, UL 3741 compliant with Tesla/MidNite paths, and backed by a practical design/permit tool for fast residential PV deployment.
6. QuickBolt
QuickBOLT builds roof attachments with asphalt-shingle residential solar. Their signature over-the-shingle QB2 with Microflashing® is designed for fast, clean installs while meeting demanding lab and code tests. The company backs its hardware with a 25-year manufacturer warranty and publishes engineering data installers can hand straight to AHJs and homeowners.
- Three parts: Microflashing®, L-foot, dual-drive shoulder screw, and Miami-Dade NOA approval.
- Third-party tests show no leakage at ASTM E331 (15 psf; also 120 min @ 30 psf) and ASTM E2140 (6″ water column for 7 days).
- Tighten to 150 in-lb to compress Microflashing; rail slot accepts 5/16″ or 3/8″ bolts; compatible with asphalt, EPDM, and TPO roofs.
- 25-year manufacturer warranty. Eligible installers can pair hardware with SolarInsure’s 30-year parts & labor protection.
QuickBOLT’s QB2 platform delivers a tight, code-ready path for residential PV for solar installers in California who want fast, over-the-shingle mounting with test data and extended terms.
Simplify Shortlist to Installation Process With These Top-Rated Solar Panel Companies
The fast-paced changes in California’s solar industry center on the smart moves made by proven residential solar installers and solar manufacturing companies. Use the installer list to request 2–3 bids and insist on clear line items: $/W for PV, $/kWh for batteries, a written production guarantee, a workmanship term, and who owns execution and monitoring.
In the same state, you can also find the best solar installers in the Sacramento region. Inspect manufacturers as well, but first thoroughly understand the solar network in various areas of California.
