Solar Panels Cost $13k-$23k in Whatcom County, WA | August, 2025
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How much do solar panels cost in Whatcom County, WA in 2025?
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In Whatcom County, WA, the cost per watt of solar is around $3.33 per watt in August, 2025.
Each 1 kW (1000 watts) of solar generation capacounty will require an investment of $3,330 for installation. You are able to come to this conclusion as a result of this rate price cost. With a 30% federal tax credit, the average expense for a 5 kW panel install in Whatcom County is approximately $11,655. Please consider, a 5kW system might not be sufficient to satisfy your energy needs.
To your left, you have the option to choose your county and view the average roof size along with the average maximum capacity for solar panel installations on homes in your area. Below, you can see an analysis of the price, payback period and 20 year average savings for a 5 kW system in your county.
Average out-of-pocket cost for a 5 kW system The upfront amount spent to buy and install solar.
Whatcom County: $11,655US Average: $12,523
Average Payback Period The number of years until you break even on the solar investment.
Whatcom County: 7 yearsUS Average: 7 years
Average Net 20-year savings The total amount of money saved over 20 years minus the out-of-pocket cost.
Whatcom County: $15,644US Average: $17,429
Solar Potential in Whatcom County
Estimated system size and solar electricity production per median viable roof in Whatcom County.
Roof size 751sq. ft.
Capacity 10.5kW DC
Electricity 10.1kkWh AC per yr.
Electricity Costs in Whatcom County, WA & What that Means for Your Solar Panel Pricing
The typical monthly electric bill for a Whatcom County energy consumer is 134.56, based on an average usage of 873 kWh. Keep in mind that apartments and smaller dwellings, which usually have lower energy needs, are covered in this number.
The mean rate for electricity in Whatcom County, WA during August, 2025 is 15.42¢ per kWh.
At this time, a 10 kW solar system is priced at $33,300, but the 30% federal tax credit lowers it to $23,310
Go Solar for less than your cell phone bill.
Average solar panel costs by system size in Whatcom County
Presented on the left and below is the cost analysis for different sizes of solar panel systems installed in Whatcom County. Larger solar installations have a greater cost, yet they also provide increased electricity savings and higher income tax credits.
The solar panel calculator, situated down and to the right, provides a detailed cost and benefit analysis based on a typical $134.56 electric bill for Whatcom County. If you want personalized results, change the $134.56 to your typical electricity bill amount.
System Size
Roof Size Min. space required
Electricity Value Annual Production
Est. Price
System Size 6kW
Roof Size Min. space required
429 ft²
Electricity Value Annual Production $1,013 a year
Est. Price
$13,986
Savings from a 6kWthis system
Est. yearly production 6,752 kWh
Est. monthly savings $84
Full payback in 9 years
Environmental Impacts
Reduces CO2 emissions by 2.04 tons a year
Equivalent to planting 94 trees a year
Equivalent to driving 5,047 mi less a year
System Size 7kW
Roof Size Min. space required
501 ft²
Electricity Value Annual Production $1,182 a year
Est. Price
$16,317
Savings from a 7kWthis system
Est. yearly production 7,877 kWh
Est. monthly savings $98
Full payback in 10 years
Environmental Impacts
Reduces CO2 emissions by 2.38 tons a year
Equivalent to planting 109 trees a year
Equivalent to driving 5,888 mi less a year
System Size 8kW
Roof Size Min. space required
572 ft²
Electricity Value Annual Production $1,350 a year
Est. Price
$18,648
Savings from a 8kWthis system
Est. yearly production 9,003 kWh
Est. monthly savings $113
Full payback in 12 years
Environmental Impacts
Reduces CO2 emissions by 2.72 tons a year
Equivalent to planting 125 trees a year
Equivalent to driving 6,729 mi less a year
System Size 9kW
Roof Size Min. space required
644 ft²
Electricity Value Annual Production $1,519 a year
Est. Price
$20,979
Savings from a 9kWthis system
Est. yearly production 10,128 kWh
Est. monthly savings $127
Full payback in 13 years
Environmental Impacts
Reduces CO2 emissions by 3.06 tons a year
Equivalent to planting 140 trees a year
Equivalent to driving 7,570 mi less a year
System Size 10kW
Roof Size Min. space required
715 ft²
Electricity Value Annual Production $1,688 a year
Est. Price
$23,310
Savings from a 10kWthis system
Est. yearly production 11,254 kWh
Est. monthly savings $135
Full payback in 14 years
Environmental Impacts
Reduces CO2 emissions by 3.26 tons a year
Equivalent to planting 150 trees a year
Equivalent to driving 8,072 mi less a year
Whatcom County Solar Panel Installation Incentives & Rebates | 2025
The REAP Grant offers substantial financial support, potentially covering 80% to 100% of the costs for rural businesses and agricultural operations to install photovoltaic or wind energy systems. Think you might be eligible? Verify your qualification with our REAP Grant eligibility tool.
Thanks to the 30% federal income tax credit, residential solar installations are accessible for most people, turning solar power a sensible investment in various states. Furthermore, a variety of state and local programs are available to encourage solar adoption.
There are 15 solar rebate and incentive initiatives currently offered in Washington by various utilities and government bodies.
Solar incentives in WAIncentive Description Value
Renewable Energy Sales and Use Tax Exemption
Value:Varies
Most renewable energy systems in Washington state are at least partially exempt from sales/use tax. Qualifying technologies include solar, wind, some biomass, hydroelectric, geothermal, landfill gas, and hog fuel (wood-burning.) Total exemptions are available for hog fuel systems and solar devices rated for less than 10 kW. Other systems will receive a 75% exemption applied at the time of purchase. Exemption certificates are available from the Department of Revenue and must be presented to the equipment dealer.
Renewable Energy Standard
Value:Varies
Washington first established a renewable portfolio standard in 2006 upon the passage of a statewide referendum. The most recent standard goals required at least 15% of each utility's retail electricity to be generated using renewable technology by 2020. Compliance with the standard is measured using a Renewable Energy Credit system pegging one megawatt hour of electricity to a variable dollar amount. Utilities may generate credits using their own renewable facilities or purchase them from customers through tariff programs. Should a utility fail to meet its standard quota, it will be fined for each credit it is deficient. Utilities are exempt from the standard if they do not have load growth or if renewable energy investment would not be cost-effective.
Interconnection Standards
Value:Varies
Distributed generation and interconnection practices in Washington state have been standardized since 2007. All private utilities are subject to the standards; local public utilities and cooperatives are exempt. Each new renewable energy system to be interconnected will be assigned one of three regulatory Tiers. A system's Tier determines the IEEE/UL/NEC standards it must follow and the rigor of the permit process, including application fees and turnaround times. Tier 1 ends at 25 kW, while Tier 2 ends at 500 kW. External disconnect switches are required for systems at or above Tier 2. Utilities may require customers to carry liability insurance or a minimum warranty for their system.
Green Building and Energy Reduction Standards for State Agencies
Value:Varies
Since 2005, new state buildings and public remodeling projects in Washington state have been required to follow certain green building standards. Any new occupied public building at least 25,000 square feet in size must meet the requirements for LEED Silver certification and pursue formal accreditation from the US Green Building Council. Remodeling projects should incorporate as many LEED principles as possible, though they are not required to pursue formal certification. Additional information is available from the Washington Department of Enterprise Services.
Clark Public Utilities - Solar Energy Equipment Loan
Value:Varies
Residential customers of Clark Public Utilities may be eligible for special loans to fund new solar energy systems and components. The maximum available principal per loan is $30,000 at 3.5% APR. The principal determines both repayment period duration and the applicable fees and conditions. Additional information is available from the CPU website.
Grays Harbor PUD - Net Metering
Value:Varies
The Grays Harbor Public Utility District operates a unique net metering program. Credits for net excess generation are awarded at the end of each year and amount to half of the normal retail price. While the Grays Harbor program technically does not follow the letter of the state's net metering laws, customers may earn additional benefits and have a greater incentive to adopt renewable energy. Additional information is available through the utility website.
Seattle City - Solar Permit Requirements
Value:Varies
Seattle's zoning laws and local ordinances contain special provisions and accommodations for solar energy within city limits. All new solar projects are required to obtain electrical permits, but may not need building permits if the total system weight is less than 1,000 pounds or the system does not require alterations/stand-alone structure of more than $4,000. Setback requirements prohibit systems from being located in a front yard. However, solar panels may extend up to four feet from the normal height limit for the zone. A central guide is available from the city website detailing all applicable regulations and process flows.
WSHFC Sustainable Energy Program
Value:Varies
The Sustainable Energy Program/Trust is a division of the Washington State Housing Finance Commission. Residents and businesses undertaking new green construction or making energy efficiency improvements may be eligible for at least $50,000 of special financing. Interest rates of 2 - 4% are available. To qualify, a project should improve the site or entity's energy efficiency by at least 10%. Standard engineering reviews and pre/post-work energy audits apply. Additional information is available from the WSHFC website.
Evergreen Sustainable Development Standard for Affordable Housing
Value:Varies
The Evergreen Sustainable Development Standard is Washington's green building rubric tailored for new affordable housing. Standards are based on LEED and incur points for compliance. Small energy efficiency practices can earn 1 point, using renewable energy (such as solar PV) can earn five points, and exceeding the total standard will earn 15 points. New affordable housing projects should earn at least 50 points; remodeling projects should earn at least 40 points. Additional information and a copy of the standard are available from the Washington State Department of Commerce.
Renewable Energy Manufacturing Program
Value:Varies
The Sustainable Energy Program/Trust is a division of the Washington State Housing Finance Commission. Residents and businesses undertaking new green construction or making energy efficiency improvements may be eligible for at least $50,000 of special financing. Interest rates of 2 - 4% are available. To qualify, a project should improve the site or entity's energy efficiency by at least 10%. Standard engineering reviews and pre/post-work energy audits apply. Additional information is available from the WSHFC website.
Mandatory Utility Green Power Option
Value:Varies
Washington state law requires all public or private electrical utilities with a customer base of at least 25,000 to offer green power options. Customers can purchase 100% renewable energy in fixed blocks. This energy may be derived from solar, wind, biomass, hydroelectric, landfill gas, or a combination of these technologies. Each customer will be notified of the green power option on a quarterly basis. Annual reports on program uptake and resources are available from the state legislature.
Tax Abatement for Solar Manufacturers
Value:Varies
In 2005, former Washington governor Christine Gregoire approved a legislative corporate tax cut for the state's solar energy device and component manufacturers. Current tax rates for these companies are at least 43% below the average liability. Tax incentives only apply to businesses producing silicon components, semiconductors, solar cells, converters, and other components directly involved in the production of photovoltaic energy. The special rates expire in 2027. Additional information is available from the Department of Revenue.
Net Metering
Value:Varies
In Washington, any renewable energy system rated for under 100 kW is eligible for net metering. All public/private utilities and cooperatives must offer interconnection and net metering to new renewable energy customers. Upon agreeing to a net metering contract, the energy system's owner will have a bidirectional meter installed to measure net excess generation (NEG) sent back to the grid. Utilities will credit customer bills for NEG at an avoided-cost rate per kilowatt hour. Should generation exceed consumption for any given cycle, NEG credits may roll forward to subsequent months. Additional information is available from the Washington Utilities and Transportation Commission.
Renewable Energy Cost Recovery Incentive Payment
Value:Varies
The Sustainable Energy Program/Trust is a division of the Washington State Housing Finance Commission. Residents and businesses undertaking new green construction or making energy efficiency improvements may be eligible for at least $50,000 of special financing. Interest rates of 2 - 4% are available. To qualify, a project should improve the site or entity's energy efficiency by at least 10%. Standard engineering reviews and pre/post-work energy audits apply. Additional information is available from the WSHFC website.
Energy Efficiency and Solar Grants
Value:Varies
The Sustainable Energy Program/Trust is a division of the Washington State Housing Finance Commission. Residents and businesses undertaking new green construction or making energy efficiency improvements may be eligible for at least $50,000 of special financing. Interest rates of 2 - 4% are available. To qualify, a project should improve the site or entity's energy efficiency by at least 10%. Standard engineering reviews and pre/post-work energy audits apply. Additional information is available from the WSHFC website.
Are solar panels worth it in Whatcom County, WA?
If you're expecting to reside in your home past the solar system's payback period, solar panels are a smart decision in Whatcom County. Installing a 5 kW solar system in Whatcom County, WA will, on average, save you $20,639.4 over 20 years, and you can expect to break even in about 7 years.
The cost of not having solar panels in Whatcom County, WA
Without solar panels or another backup power source, you miss out on the savings highlighted previously and rely entirely on your electric utility for electricity. Recent media examples have revealed that complete dependence on your utility company isn't always the best condition.
Lately, the average number of utility outages per customer annually in Whatcom County has been about 1.1. Each outage, on average, lasts for 167 minutes. In the case of major events like planned maintenance, grid management errors or winter storms, this period can rise substantially.
Take a look at the component below to see the number of current electricity customers without power in Whatcom County.
Owning a solar panel system, with or without a backup battery, could reduce the pressure of any future outages you may experience.
Power Outages
Currently, 0 customers are being tracked in Whatcom County.
What impacts the cost of solar panels in Whatcom County, WA?
Your Energy Needs - With larger solar panel systems, the cost per watt declines, despite the greater upfront expense. Homeowners often realize that setting up a solar system that can cover their entire electric bill is advantageous, resulting in optimal savings.
Make & Model - Solar panels come in a range of makes and models. Considering the brand preferences that your installer may have, it's essential to select a reputable installer. For consumers desiring a better long-term experience, investing in superior quality makes and models is critical.
Solar Panel Type - For many good reasons, monocrystalline panels are now the standard in the industry. Even though they are pricier, they generate additional energy. Many installers utilize panels made from this material.
Your Property - Each property and home is one of a kind. Uneven ground, trees, or additional hindrances can increase the difficulty of installing solar panels. By using satellite images, the majority of solar installers nowadays can evaluate your home and incorporate these factors into the initial cost estimate.
Labor Rates - Employees are paid varied wages from different companies, and these costs are handed down to the consumers. Paying higher wages typically results in companies receiving better reviews for their work and customer service.
Permitting & Interconnection - Permitting and utility interconnection fees change locally and will influence your installation cost. Quality installers will factor these costs into your first quotes to prevent unexpected expenses.
See what solar panels cost in other Whatcom County cities
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Whatcom County, WA Solar Panel Cost FAQs
The typical cost per watt for solar panels in Whatcom County, WA as of August, 2025 is $3.33/W. Post federal tax credit, a 5 kW solar panel system installation in Whatcom County, WA will roughly cost $11,655.
Right now, Washington has 15 rebates and incentives available through a variety of utility companies and government entities. In addition, the 30% federal income tax credit is available to almost everyone.
Opting for cash payments results in the highest savings, but there are now numerous financing options for solar panels that are financially sensible. Many installers have partnerships with financing companies and will provide this information in your initial quotes.
Yes, in Whatcom County, WA, 5 kW solar panel systems typically pay off in 7 years, and users save around $20,639.4 in electricity costs over 20 years.
Savings from 
Environmental Impacts 
