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Best 5 Solar Companies in Vacaville, CA

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Written By Max Peterson|Last Updated: February 05, 2024

Vacaville homeowners experience 6,900,000 sunny days each year, making the city an excellent environment for solar power. While switching to solar energy comes with upfront costs, local homeowners could ultimately save $1,700 per kilowatt on their electric bills. A professional installer can help you select the best panels to maximize your savings. In this guide, we'll showcase Vacaville's best solar providers and offer advice for your company choice, so you can find the ideal one for your household.

Best High-Efficiency System
  • Builds custom, high-efficiency solar systems suited to each home
  • Extensive coverage area throughout the country
  • Offers energy storage and EV charger add-ons
Best Solar Panel Leasing
  • Provides system monitoring
  • Offers diverse financing options for various budgets
  • Provides EV and solar battery solutions
Best Solar Panel Installation
  • Offers 7 panel brand options
  • 25-year workmanship warranty
  • Offers battery options

Top Vacaville Solar Companies

Sunrun Solar Logo

Sunrun Solar

Based on 52 customer reviews.

Services Offered

Grid-Tied Solar SystemBattery StorageCleaning And MaintenancePermit AssistancePanel InstallationTesla PowerwallFinancing Assistance


  • Informative resources
  • Free quotes
  • Reliable customer support
1215 Striker Ave Ste 120, Sacramento, CA 916-547-5250 sunrun.com
Ambrose Solar Logo

Ambrose Solar

Based on 134 customer reviews.

Services Offered

Battery StorageCleaning And MaintenancePanel InstallationFinancing AssistancePermit Assistance


  • Free quotes
  • Clear pricing policy
  • Informative resources
820 Eubanks Dr Suite A, Vacaville, CA 707-999-8036 ambrosesolar.com
Sunbank Solar Logo

Sunbank Solar

Based on 16 customer reviews.

Services Offered

Off-Grid Solar SystemsPanel Installation


  • Clear pricing policy
  • Free quotes
  • Informative resources
2020 5th St #1713, Davis, CA 888-385-0005 thesunbank.com
Solar Optimum Logo

Solar Optimum

Based on 28 customer reviews.

Services Offered

Tesla PowerwallPanel InstallationBattery StorageFinancing Assistance


  • Clear pricing policy
  • Informative resources
  • Reliable customer support
6012 Egret Ct, Benicia, CA 707-238-7300 solaroptimum.com

More Local Solar Companies

Certified Solar, Heating & Air Conditioning

User Reviews: 4.5/5 

5040 Commercial Cir unit c
Concord, CA 94520

Green Air and Solar

User Reviews: 4.5/5 

3953 Industrial Way
Concord, CA 94520

Bay Valley Solar Roofing

User Reviews: 4.5/5 

1820 Arnold Industrial Way Ste A
Concord, CA 94520

Got Watts?

User Reviews: 4.6/5 

2045 Commerce Ave
Concord, CA 94520

Semper Solaris

User Reviews: 4.2/5 

1990 Olivera Rd Suite E
Concord, CA 94520

Suntrek Solar

User Reviews: 4.4/5 

721 E 18th St
Antioch, CA 94509


User Reviews: 4.3/5 

2150 John Glenn Dr Suite 250
Concord, CA 94520

High Definition Solar

User Reviews: 4.2/5 

1190 Burnett Ave
Concord, CA 94520

Sol R Us

User Reviews: 4.2/5 

1050B Shary Ct
Concord, CA 94518

To share feedback or ask a question about this article, send a note to our Reviews Team at reviewsteam@thisoldhousereviews.com.

Ranking Methodology

Our team has screened dozens of solar contractors near Vacaville, concentrating on the following criteria:

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Facts about Vacaville
Average Max Temp:73°F
Solar Payback Period:6.8 years
Average Daily Sunlight:67%
Homes Powered by Solar:18,709
Average Annual Energy Bill:$1,538
Solar Power per Capita Percentile:48.0%

Expert Tips By

This Old House empowers homeowners with the knowledge and tools they need to tackle various projects and navigate the complexities of homeownership.

Benefits of Solar Energy

Solar energy has numerous advantages that will enhance your home for years to come.

  • Better energy independence: Solar systems with battery storage work through blackouts and emergencies, and you won't have to rely on the power grid for your safety and well-being.
  • Reduced carbon footprint: Solar is the universe's most abundant clean energy source, meaning you can lower or beat your home's dependence on non-renewable sources.
  • Lowered energy bills: Solar panels allow you to generate your own energy to power your home, reducing your periodic electricity costs. You can eliminate your bills completely if you go off-grid.

What Solar Incentives Are Available to Vacaville Homeowners?

Governments and utilities often incentivize homeowners for going solar. Here are some of the tax credits, rebates, or other programs you could qualify for.

Incentive Type: Property Tax Incentive

Website: boe.ca.gov

Incentive Amount:

100% of system value; 75% of system value exemption for dual-use equipment

Incentive Type: PACE Financing

Website: wrcog.us

Incentive Amount:

Eligible products can be financed for up to 25 years, depending on the useful life of the eligible product.
Minimum financing: $5,000
The financing may not exceed fifteen percent (15%) of the market value of the property, up to the first seven hundred thousand dollars ($700,000) of the property’s market value, and ten percent (10%) of the remaining value of the Property above seven hundred thousand dollars ($700,000) minus any PACE assessment on the propertyThe total amount of any annual property taxes and assessments shall not exceed five percent (5%) of the property's fair market value, determined at the time program financing is approved.

Incentive Type: PACE Financing

Incentive Amount:

Locally determined

Incentive Type: Rebate Program

Website: selfgenca.com

Incentive Amount:

For projects 30 kW or larger, 50% of incentive will be received up-front; 50% will be received based on actual kWh production over the first 5 years. For projects under 30kW, 100% of the incentive will be paid up front.
Incentives will step down over time. See below for incentive amounts.

Incentive Type: Feed-in Tariff

Website: cpuc.ca.gov

Incentive Type: Feed-in Tariff

Website: ladwp.com

Incentive Amount:

$0.17/kWh adjusted by a time of delivery multiplier
Base price will step down over time as certain MW goals are met

Incentive Type: Rebate Program

Website: gosolarcalifornia.ca.gov

Incentive Amount:

Step 1 Incentive Rates (contact utility to determine current incentive levels):
Single Family Residential Incentives:
Systems that displace natural gas: $29.85 per estimated therm displaced
Systems that displace electricity or propane: Funding has been exhausted
Commercial/Multifamily Incentives:
Systems that displace natural gas: $20.19 per estimated therm displaced
Systems that displace electricity or propane: $0.42 per estimated kWh displaced *** Note, funding has been exhausted in this category for SCE and PG&E
Solar Pool heating: $5.00 per estimated therm displaced

Incentive Type: Personal Tax Credit

Website: ecowatch.com

Incentive Amount:

30% federal tax credit for systems placed in service after 12/31/2021 and before 01/01/2033. Good for: solar water heat, solar photovoltaics, biomass, geothermal heat pumps, wind (small), fuel cells using renewable fuels.

How To Choose the Best Solar Company in Vacaville

The more thorough your company investigation is, the better your solar installation will ultimately operate. Consider each of these criteria in your company search.

Licensing and Training

California requires solar companies to hold licenses for each type of equipment they install, which can include solar photovoltaic (PV) systems, HVAC, water heaters, pool heaters, and boilers. Contractors must take a highly comprehensive educational series, gain four years of field experience, and pass written exams to earn a license. Solar providers can also earn accreditations from standards organizations and trade groups. The most prestigious ones in the industry come from the North American Board of Certified Energy Practitioners. Most company websites will prominently display earned credentials, but you should also ask your estimator for more information.

Cost of Solar Panels in Vacaville

Your solar panels' style will impact how much energy you can generate. Monocrystalline panels perform the best but cost the most. Polycrystalline panels generate less, but they're a great traditional option for low budgets. Thin-film panels are excellent for non-traditional roof shapes and cost the least, but don't work well for large residential installations.

Additional accessories, such as electric vehicle (EV) chargers and battery storage, will add to your overall costs. However, they might make your solar system more efficient and convenient to use. Not all solar providers provide these add-ons, so look for a provider that installs them if it's crucial for you.

A majority of Vacaville homeowners select solar systems designed for five kilowatts (kW) of electrical capacity. These systems cost about $17,350 to install, considering both parts and installation. You can see more specific cost information in the table.

Solar Panel CostAverage Cost
Solar Monocrystalline$1,280
Solar Polycrystalline$998
Solar Battery$819
Solar Home EV Charger$3,071

Financing Solar Energy in Vacaville

There are many ways to pay for new solar panels, and the right one will help you decrease overhead. A few of the most common options include power purchase agreements (PPAs), loans, cash payments, and leases. Though it requires a large up-front payment, cash is the most economical choice because it doesn't accrue interest and qualifies you for incentives. Solar loans are the second most effective option. As with a home or auto loan, you'll pay a monthly rate towards system ownership, including interest. You can still apply for cost-saving solar incentives, and depending on your lender, you could put as little as $0 down. Solar leases involve paying a set monthly rate to use rooftop panels. A PPA (Power Purchase Agreement) lets you pay a monthly rate based only on the energy you use, as with an electric bill. We typically don’t recommend these two options because you won't own the system and cannot use solar incentives. Ask each provider you're vetting about the payment options it offers. A salesperson can help you determine the most suitable option for your budget.

The table below lists the average payback periods for different capacities of solar systems in Vacaville.

You are eligible for a 26% federal tax credit for new solar energy devices until the year 2032. Local and state governments and utility companies might also offer discounts, rebates, and specialized financing options that could save you more.

Solar System CapacityEstimated Payback period
1 kW1.4 years
2 kW2.7 years
5 kW6.8 years
10 kW13.7 years

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Frequently Asked Questions About Solar in Vacaville

How much money could I save by going solar in Vacaville?

Most Vacaville homeowners spend about $1,538 on energy each year. Your costs could drop by $1,725.35 for each kilowatt you generate after you pay off a solar array.

Is solar energy common in Vacaville?

Yes, solar energy is readily available in Vacaville. A growing number of area homes already access solar power on-site or through utility grids, and California has about 74255 jobs comprising its solar economy.

Should I expect a property value increase after adopting solar power?

Yes, solar panels will increase your property value. According to the National Renewable Energy Laboratory (NREL), for every dollar you reduce on energy bills, your home value increases by $20. So, if your panels save you $600 per year on energy costs, your property could appreciate $12,000.

What maintenance do my solar panels need, and how often do they need it?

To preserve your solar system's efficiency, inspections and cleanings every six months are usually enough. In dry or dusty seasons, your panels might need cleanings every one to two months. Your provider can recommend a maintenance schedule. Its team could also tackle the cleaning for you.

What size should my new Vacaville solar system be?

A typical Vacaville solar home has a 3.1-kW panel array, but you might need a larger system if your energy needs are higher. Solar contractors will consider your property's energy consumption and roof shading to suggest the appropriate system for you.

What is the average payback period for Vacaville solar panels?

Most Vacaville homeowners pay back a solar loan in 7.0 years. You can shorten the payback period by paying off extra loan principal each month.

What's the difference between a PPA and traditional financing?

The main differences between a PPA and traditional financing are that you pay a fluctuating monthly rate based on your energy usage and don't own your system. Your service provider installs and maintains the panels, and you pay for the generated electricity for 10–25 years. Afterward, you can continue the contract or buy the system.

You might consider a PPA if you don’t want to be responsible for maintaining your panels and don’t want to invest in a system, but keep in mind you won’t be paying toward ownership or be able to access any solar financial incentives. Many solar experts don’t recommend PPAs. Our guide covers other financing options above.

To share feedback or ask a question about this article, send a note to our Reviews Team at reviewsteam@thisoldhousereviews.com.