Top 10 Solar Panel Suppliers in the US for 2025

Introduction

California continues to lead the renewable energy movement, and solar power is the cornerstone of this progress. With sunshine almost year-round, favorable state policies, and growing consumer demand, more homes and businesses are turning to solar energy than ever before. In 2025, the supplier landscape is vast, making it essential to find a partner you can trust. Whether you’re interested in lowering electricity bills, boosting property value, or embracing sustainability, working with one of the best solar companies in California will set you up for success.

Today’s solar providers are about more than just panels. Many now offer full-service packages that include solar panel installation, financing plans, energy storage, and ongoing system monitoring. To help you make the right choice, this guide highlights the Top 10 Solar Panel Suppliers in California for 2025, along with practical insights into costs, financing, and what to expect during installation.

The US Solar Market in 2025

California remains the largest solar market in the U.S., with more than 1.8 million solar installations across the state. Several factors continue to drive growth:

• The decreasing cost of equipment.

• Generous state and federal tax credits.

• A cultural shift toward clean energy and sustainability.

• Increasingly advanced products, from home batteries to intelligent monitoring apps.

This booming market is excellent for consumers, but it can also feel overwhelming. With so many solar panel companies competing for your attention, knowing who truly delivers quality, reliability, and value is crucial.

Top 10 Solar Panel Suppliers in California (2025)

Here are the top companies making a difference across California’s solar landscape this year.

1. Unicorn Solar

• Overview: Unicorn Solar is a California-based leader offering custom solar solutions forhomes, commercial and utility projects. Built around international expertise, the company designs and sells equipment systems throughtout North, South and Central Americas climate and energy needs.

• Strengths: Known for a customer-first approach, reliable installations, and long-lasting products. Their diverse solar products include panels, batteries, and inverters.

• Services: Residential and commercial solar panel installation, system maintenance, and financing support. They also provide ongoing services, including monitoring and upgrades.

• Service Areas: Strong presence in San Diego and Southern California, with expanding statewide coverage.

2. SunPower

• Overview: SunPower is one of the most recognizable solar names in the U.S., with decades of experience and high-efficiency panels.

• Strengths: Industry-leading 25-year warranty, top-tier technology, and sleek designs.

• Services Offered: Residential and commercial solar panel installation, energy storage, and EV integration.

• Service Areas: Available statewide, with particular strength in Southern California.

3. Tesla Solar

• Overview: Tesla continues to innovate with its Solar Roof and Powerwall systems.

• Strengths: Stylish design, seamless integration with Tesla EVs and energy systems.

• Services: Roof-integrated solar panels, batteries, and custom solar financing options.

• Service Areas: Most of the US , with a focus on urban areas like Los Angeles and San Francisco.

4. Sunrun

• Overview: Sunrun is a top choice for homeowners seeking flexible financing.

• Strengths: Popular for leasing and Power Purchase Agreements (PPAs), making solar more accessible.

• Services: Solar panel installation, battery systems, and flexible payment plans.

• Service Areas: National presence, with a concentration in metro regions.

5. Momentum Solar

• Overview: Momentum Solar focuses on personalized customer service and transparency.

• Strengths: Dedicated project managers, excellent customer education, and strong reviews.

• Services: Full-service solar panel installation, system design, and monitoring tools.

• Service Areas: Available through most of the US.

6. ADT Solar

• Overview: Backed by the well-known ADT brand, this company brings trust and reliability.

• Strengths: Strong warranties, customer support, and a national network.

• Services: Solar systems, energy storage, and integrated home energy solutions.

• Service Areas: Growing rapidly across the US suburbs and smaller cities.

7. Semper Solaris

• Overview: A veteran-owned, California-based company with deep community ties.

• Strengths: Emphasis on American-made products, strong warranties, and veteran leadership.

• Services: Solar panels, roofing, and battery storage.

• Service Areas: Strongest in San Diego and Los Angeles, but available throughout the US.

8. Infinity Energy

• Overview: A family-owned provider with a focus on eco-friendly systems.

• Strengths: Local values, tailored designs, and a strong reputation.

• Services: Solar panel installation, roofing, and storage solutions.

• Service Areas: Throughout the US.

9. Palmetto Solar

• Overview: Palmetto takes a tech-first approach with user-friendly apps for monitoring.

• Strengths: Transparent pricing, clean designs, and strong environmental commitment.

• Services: Panels, batteries, and ongoing support.

• Service Areas: Expanding in Sacramento, the Bay Area, and other urban markets.

10. Elevation Solar

• Overview: Elevation Solar combines solar power with energy-efficiency upgrades.

• Strengths: Whole-home focus, including insulation and energy audits.

• Services: Solar panels, storage, and home efficiency upgrades.

• Service Areas: Expanding presence in inland and suburban California.

How to Choose Between Solar Panel Companies in California

With so many solar panel companies to choose from, here are some factors to consider:

• Reputation: Read reviews and ask for references.

• Credentials: Ensure installers are licensed and certified (NABCEP is ideal).

• Warranties: The longer the better—look for at least 20–25 years on panels.

• Service Areas: Some companies specialize in urban or rural regions.

• Additional Services: Energy storage or smart home upgrades may be worth considering.

What to Expect During Solar Panel Installation

Most providers follow a similar process for solar panel installation:

1. Consultation: Review your energy use and property layout.

2. Design & Proposal: Get a tailored plan with pricing and expected savings.

3. Permits & Paperwork: Your installer will handle city and utility approvals.

4. Installation: Usually completed in 1–3 days.

5. Inspection & Activation: Final checks before connecting to the grid.

Working with an experienced company ensures smoother timelines and minimal hassle.

Solar Panel Cost Nationally– Typical in 2025

The average solar panel cost California homeowners can expect in 2025 is $2.50–$3.50 per watt before incentives. For a 6 kW system, that’s around $18,000–$22,500 paid in several ways leases, loans or cash.

With federal and state tax credits plus local rebates, actual costs can drop significantly. Long-term savings on utility bills make solar an investment that often pays back within 3–5 years. Withoout the ITC it becomes 6 to 9 years.

Solar Financing Options for Homeowners

If paying upfront isn’t an option, today’s solar financing options provide flexibility:

• Loans: Own your system while making monthly payments.

• Leases: Pay a flat monthly fee while the provider owns the system.

• PPAs: Pay only for the power your panels generate.

• PACE Programs: Finance through property taxes in select areas.

The right choice depends on your financial goals and eligibility.

Why California Remains a Solar Leader

California’s solar success is about more than sunny skies. The state has:

• Some of the strongest clean-energy policies in the U.S.

• Rebates and incentives that lower costs.

• A highly skilled solar workforce.

• Innovative companies are driving technology forward.

This combination ensures that California continues to set the standard for the rest of the country.

FAQs

Who are the best solar companies in California right now?
Top providers include Unicorn Solar, SunPower, Sunrun, and Tesla Solar. These are the best solar companies in California that consistently deliver strong products and customer support.

What is the average solar panel cost in California in 2025?
Homeowners typically pay between $18,000 and $22,500 for a 6 kW system before incentives.

How long does solar panel installation usually take?
The installation itself usually takes 1–3 days, though permitting and utility approvals may extend the timeline.

What solar financing options are available?
Options include loans, leases, PPAs, and PACE financing, depending on your budget and eligibility.

Do solar panels increase property value in California?
Yes, homes with solar panels often sell faster and for higher prices in California’s competitive housing market.

Conclusion

California’s solar market is stronger than ever, offering homeowners and businesses a wide range of choices. Whether you want premium technology, flexible financing, or personalized service, the state’s providers have something for everyone.

With so many Top Solar Panel Suppliers available, you can find the perfect partner to fit your needs. By working with one of the best solar companies in California, you’ll reduce costs, increase property value, and play a part in shaping a cleaner future.