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City & County of San Francisco interconnection application

City & County of San Francisco is a municipal utility serving 3,670 residential customers in California (EIA-861, 2025). Gridpol files City & County of San Francisco interconnection applications for licensed installers – solar, storage and EV chargers – with single-line diagram and site plan, unlimited for $500 a month.

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California’s commission rule (CPUC Electric Tariff Rule 21 (utility-filed, CPUC-approved); D.20-09-035 timelines; current rulemaking R.25-08-004) does not bind municipal utilitys; City & County of San Francisco sets its own interconnection policy. We confirm its form on the first project. Publicly owned utilities are not under Rule 21 and set their own interconnection rules; PU Code §2827 net metering obligations applied to POUs until their 5% cap; POUs now offer own successor tariffs.

City & County of San Francisco at a glance

Utility

City & County of San Francisco

Type

Municipal utility

EIA utility ID

16612

Residential customers

3,670 (EIA-861, 2025)

Net-metered residential customers

none reported

Service territory

2 counties in California

Documents City & County of San Francisco asks for

  • Interconnection application formFilled in by us from your project data in the utility’s portal or on its form. Gridpol prepares this.
  • Single-line diagram (one-line)Drawn by us from your equipment data: modules, strings, inverter, battery, disconnects, point of interconnection, meter. Gridpol prepares this.
  • Site plan / site layoutDrawn by us from your roof sketch or photos: array, inverter, battery, disconnect, meter and main panel locations. Gridpol prepares this.
  • PV module spec sheetManufacturer data sheet of the modules.
  • Inverter spec sheetManufacturer data sheet (string inverter, microinverter or hybrid inverter).
  • Customer signatureThe account holder signs the application or authorization. We send the signature link.
  • Recent electric billName, service address, account and meter number must match the application.
  • Final inspection sign-offApproved electrical inspection from the authority having jurisdiction after installation.

Typical documents for US utilities – not yet verified for City & County of San Francisco. We confirm City & County of San Francisco’s exact list on the first project.

California interconnection rule

Rule 21 tariff PDFs not read in full (PG&E file too large, SDG&E host unreachable): insurance, disconnect, NEM/NBT fee and document list unverified; documents list is typical, confirm in tariff Section E. NBT cap 1 MW per PU Code 2827 eligibility - confirm.

Commission

California Public Utilities Commission (CPUC)

Interconnection rule

CPUC Electric Tariff Rule 21 (utility-filed, CPUC-approved); D.20-09-035 timelines; current rulemaking R.25-08-004 – Rule 21 - Generating Facility Interconnections · source

Applies to

CPUC-jurisdictional IOUs: PG&E, SCE, SDG&E, Bear Valley Electric, Liberty Utilities (CalPeco); PacifiCorp uses OATT-based process under D.07-07-027. Not munis/POUs (LADWP, SMUD, IID etc.). Wholesale-market facilities go under WDT/CAISO.

Application form

Utility-specific Rule 21 interconnection request forms filed with CPUC (e.g. SCE Form 14-957 for NEM/NBT, 14-732 non-export); submitted via each IOU's online portal.

Timelines

Initial Review 15 BD; Supplemental Review 20 BD; draft interconnection agreement or cost estimate within 15 BD after review; D.20-09-035 requires tracking of 19 timelines and standard construction/meter timelines.

Fees

$800 interconnection request fee; $2,500 supplemental review (SCE page). NEM-2/NBT <=1 MW historically exempt from study costs; NEM/NBT request fee amount is utility-specific (not verified here).

Export compensation

Net billing – Pub. Util. Code §2827.1; CPUC D.22-12-056 (Net Billing Tariff, 'Solar Billing Plan'); Res. E-5301
NBT applies to IOU applications submitted on/after 2023-04-15; exports credited at avoided-cost-based values; required TOU rates (E-ELEC, TOU-D-PRIME, EV-TOU-5); 9-year legacy. Earlier NEM 1.0/2.0 grandfathered.

Not bound by the rule

Publicly owned utilities are not under Rule 21 and set their own interconnection rules; PU Code §2827 net metering obligations applied to POUs until their 5% cap; POUs now offer own successor tariffs.

Other utilities in California

All California utilities →

Gridpol Unlimited

$500 / month

Unlimited interconnection applications. 12-month agreement, signed online. The agreement starts the day you sign; first invoice right away, then monthly.

  • Unlimited interconnection applications
  • Single-line diagram and site plan for every application
  • Pre-submission check against the utility’s requirements
  • Homeowner e-signature link for the authorization
  • Filing in your utility portal accounts or by the utility’s method
  • Utility questions, corrections and resubmissions
  • Follow-up through approval, inspection and PTO
  • Customer list, exports, API and webhooks
Get started

Applications are typically submitted within 2 business days after complete documents. Utility review times are set by each utility.

Get started – $500/month unlimited