Ethan BrooksBy Ethan Brooks

Updated November 2026

Seattle City Light solar net metering lets you send surplus electricity from your rooftop panels back to the grid and receive credit on your bill for it. This guide walks you through how the credit works, what you need in place before you apply, and the order of steps that keeps your interconnection moving. Read the utility’s current rules before you commit to equipment, since program terms can change.

How Seattle City Light Net Metering Credits Work

Under a net metering arrangement, your meter runs forward when you draw power from the grid and runs backward when your system exports power. At the end of a billing period, the utility nets those two flows. If you exported more than you imported, the surplus becomes a credit you can carry forward to later months. If you used more than you produced, you pay for the difference.

Shopping for one? See our guide: Net Metering in Virginia vs Virginia Community Solar: Which Should You Choose?.

Your credit is only as useful as your system size relative to your usage. A system sized to cover most of your annual consumption will rarely build a large surplus, while an oversized array can leave you with credits that roll over month after month. Pull twelve months of billing history before you size anything, and note your highest-usage months, because summer air conditioning or winter electric heat can flip your balance.

Steps to Apply for Net Metering

The application process runs in a fixed sequence, and skipping ahead usually means resubmitting paperwork. Plan on several weeks of back-and-forth before your system is allowed to operate.

  1. Confirm your home is served by Seattle City Light and that your service is in good standing.
  2. Get a site assessment that shows roof orientation, shading, and the proposed system size in kilowatts.
  3. Prepare a single-line electrical diagram showing panels, inverter, disconnect, and the point of interconnection.
  4. Submit the interconnection application and any required permit documents to the utility and your local building authority.
  5. Wait for written approval before installing or energizing the system.
  6. After installation, schedule the final inspection and any meter change the utility requires.
  7. Confirm that the bill shows your net export and carried-forward credit once the system is live.

What to Prepare Before You Submit

Most delays come from incomplete documents rather than from the utility itself. Gather these items before you file so the reviewer doesn’t have to send anything back.

  • Recent utility bills covering at least twelve months
  • Equipment spec sheets for the panels, inverter, and any battery
  • The single-line diagram, stamped if your permit office requires it
  • Roof and structural details, including rafter size and spacing if the installer provides them
  • Proof of ownership or landlord authorization for the property

Installers familiar with the Seattle interconnection process often handle the application themselves, which can shorten the timeline. If you do it yourself, expect to answer follow-up questions about inverter settings and disconnect placement.

Common Mistakes

  • Sizing the system from a sales estimate instead of your own twelve-month usage history.
  • Energizing the array before written approval, which can void your interconnection.
  • Forgetting that carried-forward credits follow your account, so a move can change what you keep.
  • Ignoring shading from trees or neighboring buildings, which lowers production and the credits it would earn.
  • Assuming the credit is paid in cash. Excess credit is typically applied to future bills under the utility’s rules.

A basic monitoring device helps you check whether your export matches what your bill shows. Look for a meter-level or inverter-based monitoring kit that reports daily production.

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A clamp-style multimeter is useful for confirming circuit currents during commissioning and for routine checks after the system is operating.

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FAQ

Does Seattle City Light pay cash for excess solar power?

Under net metering, excess generation is generally credited against future bills rather than paid out in cash. Check the current tariff for how any remaining balance is handled at the end of the year.

How long does the approval process take?

Timelines vary with application completeness and permit backlogs. Expect several weeks from submission to written approval, and factor in inspection scheduling after installation.

Can I keep my credits if I move?

Credits are tied to the account and service address, so they generally do not transfer to a new home. Ask the utility how remaining balances are settled when you close an account.

Conclusion

Seattle City Light solar net metering rewards a system sized to your real usage and a clean interconnection application. Gather your billing history, get a complete diagram filed early, and wait for written approval before energizing. Consult a licensed electrician or your installer for any work inside your electrical panel.

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Ethan Brooks

About Ethan Brooks

Ethan Brooks is part of our editorial team and reviews and edits our home solar guides, checking product details against manufacturer specifications and owner feedback.