Is there a limit to the amount of solar panels a house can have in Washington?

As a general rule, unless there are local limitations, the main limitations to the amount of solar panels you can put on your roof are the available space on your roof, your electricity usage, your providers net metering rules, and the limitations of your house hold electrical system.

How much to install solar panels in Washington?

Based on our research the average price per installed watt is $4.32 in Washington. This means for a 10kW system you can expect to pay $43,200 though pricing can vary significantly between installers based on the projects requirements.

How much do solar panels add to house value in Washington?

Based on a Zillow research study from 2019, home with solar panels sell for roughly 4.1% more.

What direction should solar panels face in Washington?

To generate the most power, solar panels in the United States should face true south as this generally results in the solar panels receiving the most light each day throughout the course of the year. That said, given that energy prices are often variable throughout the day, your installer may recommend you rotate your panels slightly so that the panels will receive more light at the end of the day when energy prices can be more expensive. That said, for most consumers the positioning of solar panels is highly dependent on your home's roof.

How many solar panel installers in Washington?

Based on our continuously updated database of solar installers, we have found 22 verified solar install companies in Washington

Going solar in Washington, DC

In Washington, an average home needs a 9kW solar system in order cover most of their electricity needs. Given the average residential price-per-watt of $4.32 in Washington, a 9kW system can cost around $38,880 depending on applicable rebates and other factors.

Average out-of-pocket cost for a 5 kW system The upfront amount spent to buy and install solar.

Washington: $21,600US Average: $19,594

Average Payback Period The number of years until you break even on the solar investment.

Washington: 13 yearsUS Average: 13 years

Average Net 20-year savings The total amount of money saved over 20 years minus the out-of-pocket cost.

Washington: $12,853US Average: $11,571

Solar Potential in Washington

Estimated system size and solar electricity production per median viable roof in
Washington.

Roof size 393sq. ft.

Capacity 5.5kW DC

Electricity 6.8kkWh AC per yr.

Go Solar for less than your cell phone bill.

Compare solar panels by system size in Washington

Get the most value out of your roof by comparing the different benefits a given system size has.

System Size 5kW

Roof Size Min. space required

358 ft²

Electricity Value Annual Production $1,075 a year

Est. Price

$21,600

Savings from a 5kWthis system

Est. yearly production 7,250 kWh
Est. monthly savings $90
Full payback in 20 years

Environmental Impacts

Reduces CO2 emissions by 4.68 tons a year
Equivalent to planting 215 trees a year
Equivalent to driving 11,577 mi less a year

System Size 6kW

Roof Size Min. space required

429 ft²

Electricity Value Annual Production $1,290 a year

Est. Price

$25,920

Savings from a 6kWthis system

Est. yearly production 8,700 kWh
Est. monthly savings $107
Full payback in 20 years

Environmental Impacts

Reduces CO2 emissions by 5.61 tons a year
Equivalent to planting 258 trees a year
Equivalent to driving 13,892 mi less a year

System Size 7kW

Roof Size Min. space required

501 ft²

Electricity Value Annual Production $1,504 a year

Est. Price

$30,240

Savings from a 7kWthis system

Est. yearly production 10,150 kWh
Est. monthly savings $125
Full payback in 20 years

Environmental Impacts

Reduces CO2 emissions by 6.55 tons a year
Equivalent to planting 301 trees a year
Equivalent to driving 16,208 mi less a year

System Size 8kW

Roof Size Min. space required

572 ft²

Electricity Value Annual Production $1,719 a year

Est. Price

$34,560

Savings from a 8kWthis system

Est. yearly production 11,600 kWh
Est. monthly savings $143
Full payback in 20 years

Environmental Impacts

Reduces CO2 emissions by 7.48 tons a year
Equivalent to planting 344 trees a year
Equivalent to driving 18,523 mi less a year

System Size 9kW

Roof Size Min. space required

644 ft²

Electricity Value Annual Production $1,934 a year

Est. Price

$38,880

Savings from a 9kWthis system

Est. yearly production 13,050 kWh
Est. monthly savings $144
Full payback in 23 years

Environmental Impacts

Reduces CO2 emissions by 7.52 tons a year
Equivalent to planting 345 trees a year
Equivalent to driving 18,616 mi less a year

Current utility bill:

Washington solar incentives, tax credit, and rebates

Washington has 6 rebates and tax credits that you may be eligable for. Visit the official links for more details to see if you apply.

Renewable Portfolio Standard

Value:Varies

Beginning in 2005, the District of Columbia has been required to meet certain investment quotas under renewable portfolio standard laws. The District must derive 100% of its energy from renewable sources by 2032, with intermediate investment targets increasing annually. Sources qualifying to meet the standard were divided into two tiers based on efficiency and emissions; as of 2019, energy from the less efficient tier no longer counts toward the standard. Compliance is measured through credits pegged to a dollar value. Retail customers "generate" these components through their use of renewable energy and "sell" them to utilities through net metering arrangements. Once "in the custody" of the utilities, credits will then go to meet the standard. Additional information on the District RPS can be found on the DCPSC website.

Green Building Requirement

Value:Varies

Beginning in 2006, the District of Columbia has required certain new construction to meet green building requirements. Unique to the District, new municipal buildings amd private buildings over 50,000 square feet are subject to the requirements. Any new city building should meet at least the Silver level of the appropriate LEED standard. New public schools are subject to the LEED for Schools Gold standard, while new public housing projects must meet different Green Communities standards. Beginning in 2009, new and renovated non-residential private buildings over 50,000 square feet should meet at least the Certified level of the appropriate LEED standard. Private schools should meet the LEED for Schools Gold standard. To incentivize compliance with the green building requirements, new private projects pursuing LEED Gold certification may have permit reviews expedited. Additional information is available from the DC environment department website.

Sustainable Energy Trust Fund

Value:Varies

The Sustainable Energy Trust Fund and Energy Assistance Trust Fund provide low-income energy assistance, efficiency improvements, and renewable adoption to D.C. residents. Currently, the D.C. Sustainable Energy Utility holds custodianship. The District obtains funds for the trust via a mandatory surcharge on consumer electric and gas bills. Surcharges go toward assisting low-income families in installing energy-efficient appliances, insulation, lighting, and distributed energy devices (such as solar PV/thermal systems), as well as educational and public outreach initiatives. Currently, the Fund has invested $1.2 billion in total energy improvements and prevented 6.2 million tons of greenhouse gas emissions. Additional information is available from the DC SEU website.

Net Metering

Value:Varies

Distributed-energy customers in the District of Columbia who source power from solar, wind, fuel cells, or other sustainable means are compensated through a net metering arrangement. Upon installation of a distributed energy device, the utility will place a bidirectional meter measuring net excess energy (NEG) generated on-site that is returned to the grid. The utility will credit the customer for the cycle's NEG at a fixed kilowatt-hour rate. Should generation exceed consumption for a cycle, extra credits will carry over to the following month. "Virtual net metering" is available for customers who choose to source their energy from a community solar farm or other renewable "microgrid" within the district limits. These customers will be credited at a proportional "CREF rate" based on the overall net metering credits for the entire microgrid. Additional information is available from the DC PSC website.

Solar Renewable Energy Credits

Value:Varies

A portion of the District of Columbia's renewable portfolio standard must be invested in solar energy through carve-out provisions. By 2023, the District must derive 2.5% of retail energy from on-site solar PV and thermal systems. Compliance with the carve-out is measured through special renewable energy credits earmarked for solar investment (SRECs). Currently, one SREC is equal to one megawatt hour of generated solar energy. Utilities will acquire SRECs under net metering arrangements with their customers that may last for three years before expiration. Should a utility fall short of the yearly RPS solar goal, it will pay an additional compliance fee to the District. Additional information is available from the DC PSC website.

Property Assessed Clean Energy Financing

Value:Varies

Through the PACE program, commercial property owners in the District of Columbia may utilize an "open marketplace" to acquire offers and financing on energy efficiency improvement projects. Under the program, owners may communicate directly with the participating lenders and contractors of their choice and arrange a specialized energy efficiency loan. Effectively, PACE loans come from the District government. Payments are not collected by conventional means; rather, local property tax assessors will service the loan by placing a non-accelerated lien (senior to mortgages) on the property. This means that should the owner sell or transfer their property, payments will become the responsibility of the new owner. Certain safeguards are in place per FHFA directives, including loss reserve funds and disclosures. Residential property is ineligible in most cases due to these new directives. Additional information is available through the District of Columbia website.

Find out who’s the best installer in other DC cities

Washington 22 Installers

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Frequently Asked Questions

As a general rule, unless there are local limitations, the main limitations to the amount of solar panels you can put on your roof are the available space on your roof, your electricity usage, your providers net metering rules, and the limitations of your house hold electrical system.
Based on our research the average price per installed watt is $4.32 in Washington. This means for a 10kW system you can expect to pay $43,200 though pricing can vary significantly between installers based on the projects requirements.
Based on a Zillow research study from 2019, home with solar panels sell for roughly 4.1% more.
To generate the most power, solar panels in the United States should face true south as this generally results in the solar panels receiving the most light each day throughout the course of the year. That said, given that energy prices are often variable throughout the day, your installer may recommend you rotate your panels slightly so that the panels will receive more light at the end of the day when energy prices can be more expensive. That said, for most consumers the positioning of solar panels is highly dependent on your home's roof.
Based on our continuously updated database of solar installers, we have found 22 verified solar install companies in Washington