Solar Companies in Pasadena, CA: Installer Counts and License Checks

Installers who connected the most home solar systems on SCE-served Pasadena addresses in 2025

Counts from utility records, not a ranking or endorsement. Check each license's status and complaint history on the CSLB's Check a License page (checked Sept. 24, 2026). These are SCE customers whose service address the utility lists under Pasadena; Pasadena Water and Power customers are not in the data.

Source: California Distributed Generation Statistics (CPUC), Interconnected Project Sites data set, data through May 31, 2026 (checked Sept. 24, 2026).

Home solar on SCE-served Pasadena addresses by the numbers

SCE approved 61 home solar systems at SCE-served addresses listed as Pasadena in 2025, from 35 installers; the top three were named on 20% of them. The busiest year since 2021 was 2023, with 103 (2025: -41%). Another 26 were approved from January through May 2026.

2025 mix: 21% leased or on a power purchase agreement, 79% owned by the household; 79% with a battery; median size 7.05 kW DC.

Hiring a solar company in Pasadena

In Pasadena the utility, not the City, is the first gate for any solar company: Pasadena Water and Power must approve the project through its PowerClerk system before a building permit can be issued, and it caps a system at 150% of your average annual use. PWP bills a tiered rate and sets its own solar rules, so compare at least three written bids that model your own PWP bills, not SCE's.

Start with your Pasadena electricity bill

Pasadena Water and Power, the City's own utility, bills almost all of Pasadena; the Energy Commission's map shows a small SCE area at the edge of the city. PWP charges a tiered rate, effective July 1, 2026: a $17.50 monthly Customer and Grid Access Charge, energy and transmission charges on every kWh, and a distribution charge that climbs from 3.505 cents for the first 350 kWh to 25.233 cents above 750 kWh. A proposal built on SCE or PG&E rates is not a Pasadena proposal.

PWP's approval comes before the building permit

Pasadena reverses the order many homeowners expect. PWP's eligibility rules require its initial review approval before anyone applies for a building permit, and the installer, not the homeowner, submits the application online through PWP's PowerClerk system. The package includes a single-line diagram, a site plan, the signed contract between you and the installer, a copy of your PWP bill, the Net Metering and Surplus Compensation enrollment form, the interconnection agreement, your billing history or square-footage verification, and an HOA approval letter where one applies.

The agreement depends on size. Systems up to 15 kW sign PWP's Small Solar Generator Interconnection Agreement; larger ones sign the Qualifying Facility Interconnection Agreement and must carry insurance. If you add a battery, PWP counts the combined solar and storage inverter ratings toward that 15 kW line, so a battery can move an otherwise small job into the larger agreement. PWP's solar desk is at PWPSolar@cityofpasadena.net or (626) 744-4495.

PWP's equipment and sizing rules

PWP will not approve a system sized to produce more than 150% of your average annual consumption on its billing record for the year before you apply; for new or expanded space it uses 2 watts DC per square foot of conditioned floor area instead. Every system must fall between 1 kW and 1,000 kW CEC-AC, use new equipment from the California Energy Commission's eligible equipment lists, carry at least a 10-year warranty, and have an AC manual disconnect within 8 feet and in line of sight of the PWP meter.

Those rules settle arguments before they start. If one bidder proposes a much larger system than another, ask it to show the PWP billing history behind the size. If a bid does not say where the disconnect goes or how long the warranty runs, it has not been written for PWP.

What a Pasadena quote needs to explain

A comparison to ask for

Because PWP's distribution charge is tiered, the first kWh your panels offset each month are the most expensive ones you buy. Ask two bidders to show your last twelve PWP bills, how many kWh each month fell in the 25.233-cent tier, and how much of that their system removes. A bid that values every offset kWh at one average price is guessing.

Verify the company behind the Pasadena quote

Match the business name and license number on each Pasadena proposal to the CSLB record, then use our contractor verification steps, the quote comparison guide and the PPA, loan, lease and cash comparison.

Permit fees and the filing route are on the Pasadena solar cost and permit page.

Pasadena solar quote questions