Installing a solar system on your home or business is a long-term investment. To get a rough estimate of what system cost and electricity savings might look like for you, try PSE’s Personalized Solar Calculator. If you’re looking to save money on your electricity bill immediately, there are other low and no-cost options. Learn more here.

If you’re not sure if you’re ready to install your own solar, but you’re still interested in supporting renewable energy, you may be eligible for one of our other renewable energy programs, like Green Power or Solar Choice or Community Solar, which do not require any equipment to install or maintain to participate.

Yes, solar panels perform best when facing south (east and west or a combination is OK, too) and are unshaded between 10 a.m. and 3p.m. year-round.

Your solar installation will be shaped by a variety of factors, including your budget, roof space and energy use. Installations are typically sized in kilowatts (kW), the power capacity of the system. On average, 1 kW of solar power in the Puget Sound region can produce about 1,100 kilowatt hours (kWh) annually. Net metering lets you use the energy you generate to offset the cost of energy used from the grid at other times. Net metering does NOT provide any financial benefit to sizing a solar system to generate more energy than you use on an annual basis. To get an idea of system size based on your energy use, unshaded roofspace and budget try PSE’s Personalized Solar Calculator.

Consider other energy efficiency upgrades first. The lower your electric use, the smaller your investment in solar equipment needs to be to offset it. If you’re adding an electric vehicle or other large electrical appliance to your home in the near future, factor that into the sizing of your solar array. If you need to replace your electrical panel to accommodate solar, a qualified solar installer will review options and likely include it in their bid. If your roof isn’t fairly new, you might consider replacing it before installing solar. Once installed, solar panels should last more than 20 years, so any needed roof work should happen before installation.

Start by selecting an experienced installer. Through PSE Recommended Energy Professionals (REPs), you can find a reliable and qualified solar installer who can help determine if your home or business is ideal for solar. The solar installers in our REP network have high customer satisfaction rates and communicate in a timely manner. When considering solar, don’t feel pressured to sign anything before you fully understand the details and cost; be wary of aggressive sales and marketing tactics promising “free” or “no-cost” solar. We strongly recommend getting at least three bids on your solar project and checking references. All installers should include in your bid the total project cost, the cost per kW and the expected annual energy output of the system based on analysis of your site. Make sure that any financing costs are clearly stated.

Many solar installers can help you access financing through a local credit union or other financial institution and explain how that impacts the cost, benefits and estimated return on investment from your installation.

PSE keeps track of the energy you use and the amount of excess power your system generates. You only pay for the net amount of energy that PSE provides, plus your basic monthly charge. If you produce more energy than you use within a given bill period, and have a net metered system, PSE banks the extra net metering credit. Your banked credit will automatically offset energy charges in future bill periods. Per state law, banked net metering credits, cannot be cashed out or transferred to other customers and expire March 31 of each year. This is why we do not recommend sizing your solar array to produce more electricity than you expect to use annually.

For other non-net metered solar  systems, financial credits are added to bills each month. This credit can be used to reduce that month’s bill or accumulate and reduce a future month’s energy bill. This credit does not expire.

PSE Rate Schedule 150 for Net Metering is available to Customers that apply for interconnection of a new or modified solar system until December 31, 2025, or when a new Net Metering rate schedule becomes available, whichever is later. Customers with a solar system approved under the terms of Net Metering Rate Schedule 150 will be allowed to stay in this program.

Yes! While we don’t know yet what future solar rates will be, PSE is committed to the following:

• Schedule 150 Net Metering will remain available until a new rate schedule is in place for customer-connected solar.
• Future solar customers will be able to use the power they generate
• PSE will provide notice before closing Schedule 150 to new applicants and time for applicants to complete their solar installation.
• PSE is participating in state-led efforts to determine the fairest, most equitable approach for future customer-solar rate design.

Batteries add backup power. It is important to know that solar panels on their own cannot produce energy for your home during a grid outage. Solar Energy Systems disconnect automatically from the utility grid in the event of an outage to protect the safety of individuals and restoration crews. However, batteries installed along with solar can be charged from the grid or your solar panels and then can isolate from the grid during a power outage to provide power to some or all of the home's energy loads. The amount of time the batteries can power a home depends on the battery's size and the power used by the house.

Batteries do add to the cost of a system, so it is essential to consider how much value the backup power has to you. PSE also offers programs that provide incentive to customers to install a battery and share a portion of its stored capacity with PSE during peak events. Visit the Flex Batteries page to learn more!

For net metered systems, any excess electricity your solar system sends to the grid is tracked as an energy credit (kilowatt-hours, or kWh) and applied to future electric usage on your account.

For non-net metered systems, such as larger commercial or wholesale generation projects, compensation may be provided through a financial payment arrangement based on the terms of an approved agreement with PSE. The amount and structure of compensation vary depending on the project type and program requirements.

Customers considering a solar project should review the applicable interconnection and compensation options to determine which arrangement best fits their facility and energy goals.