How much does a 15 kW solar panel system cost in 2022?

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15 kw solar system

Installing a 15-kilowatt (kW) solar system on your home can greatly reduce your monthly energy costs. To maximize your long-term solar savings, you want to be confident you're getting a good price for your solar energy investment. The best way to feel confident about your purchase is to compare multiple offers for 15 kW solar systems against the prices offered by other solar shoppers in your area. Learn more about the cost of a 15 kW solar system, the amount of electricity you can expect your 15 kW system to produce, and the smartest way to shop for solar in EnergySage's guide to 15 kW solar panel systems.

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As of January 2022, the average cost of solar in the U.S. is $2.77 per watt ($41,500 for a 15-kilowatt system). That means that the total cost for a 15 kW solar system would be $30,747 after the 26% federal solar tax credit (not factoring in any additional state rebates or incentives).

To understand the range of prices that solar shoppers are paying for 15 kW solar energy systems across the United States, we analyzed solar quotes from the EnergySage Solar Marketplace. EnergySage makes it possible to shop for the right home solar panel system at the right price by comparing multiple offers from solar installers in your area.

The table below has a range of prices that homeowners have paid for a 15 kW solar energy system in different states. These prices indicate the gross cost, which means that the federal tax credit for solar has not been deducted yet. Depending on where you live, you may also be able to access solar rebates and incentives from the state government, local government, or utilities that can reduce your out-of-pocket solar costs even further. Some states also have a market for solar renewable energy certificates (SRECs), which means you can actually earn additional income by selling the SRECs your system generates.

Even if you live in an area without additional solar incentives or rebates, you can ensure that you get the best price for your solar panel system by reviewing offers from multiple solar companies. Homeowners who compare solar offers on the EnergySage Solar Marketplace generally save 20 percent simply by reviewing multiple solar options from different companies.

How much does a 15,000-watt solar system cost in my state?

15 K W Solar System Price Range
Arizona$31,050 – $38,850
California$36,000 – $44,700
Colorado$42,300 – $51,600
Florida$32,100 – $41,100
Massachusetts$41,250 – $52,050
Maryland$37,650 – $49,950
New Jersey$36,000 – $47,700
New York$40,650 – $54,150
Texas$34,050 – $45,150
Washington$34,650 – $44,550

These numbers can serve as a point of reference for you as you begin the process of shopping for a solar energy system for your home. However, many different factors can affect the cost of your solar energy system. For example, if you choose to install high-efficiency equipment or need special accommodations for a complicated roof, your system will cost more. If you receive a quote from a solar company that is significantly higher or lower than the range for a 15 kW solar system in your state, simply ask them for an explanation. A reputable solar installer will be happy to walk you through their proposal in detail.

It should come as no surprise to you that the amount of sunshine where you live is the most important factor that determines just how much electricity your solar panels will produce. For example, if you install a 15 kW solar panel system on your roof in Phoenix, you'll generate about 25 percent more electricity over the course of a year than if you installed the same system on a roof in Boston. This isn't to say that you have to live in Arizona for solar to be a good option for your home – if you have a high electricity bill, solar is a smart investment for you.

Below is a table with estimated average electricity production numbers for 15 kW solar energy systems in cities across the United States. As a comparison, the average U.S. household uses about 893 kilowatt-hours (kWh) a month, a total of 10,715 kWh per year. We developed these estimates using PV Watts.

Solar electricity output of a 15,000-watt solar panel system in U.S. cities

Average Daily K Wh
Average Monthly K Wh
Average Annual K Wh
Austin, TX60.91,85222,224
Boston, MA54.31,65119,815
Cleveland, OH49.91,51818,213
Denver, CO62.81,91022,918
Hartford, CT51.21,55618,671
Las Vegas, NV72.32,19926,384
Los Angeles, CA65.11,97823,739
Miami, FL60.11,82821,936
New York City52.41,59319,114
Philadelphia, PA53.61,62819,536
Phoenix, AZ71.12,16125,926
Seattle, WA44.81,36216,339

Ready to get started? When you shop for solar through the EnergySage Solar Marketplace, you can review multiple offers from solar companies and find the best offer for your solar installation. The EnergySage Marketplace offers comprehensive, easy-to-understand comparison tables that make it easy to review all of your equipment options and financing offers, as well as solar company reviews. When you compare multiple solar quotes, you can feel confident that you're making the smartest investment possible for your home.

Find out what solar panels cost in your area in 2024
Please enter a five-digit zip code.
  • 100% free to use, 100% online
  • Access the lowest prices from installers near you
  • Unbiased Energy Advisors ready to help
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