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Investor-owned utility

APS interconnection application

APS is an investor-owned utility serving 1,287,097 residential customers in Arizona (EIA-861, 2025). Applications: PowerClerk (APS Interconnection (PowerClerk)). Gridpol files APS 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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Process verified from APS’s official sources (see below). Guide dated Oct 2021 (file 2024); fees, review timelines and current export rate not confirmed.

APS at a glance

Utility

Arizona Public Service Co (Pinnacle West Capital)

Type

Investor-owned utility

EIA utility ID

803

Residential customers

1,287,097 (EIA-861, 2025)

Net-metered residential customers

190,456 (EIA-861, 2025)

Service territory

14 counties in Arizona

How to apply

PowerClerk – APS Interconnection (PowerClerk) · official link

Who submits

Installers apply in PowerClerk; customer authorizes via Authorization Form signed by APS customer of record and property owner (DocuSign). Customers can view/initiate via aps.com.

Export compensation

Net billing
Not confirmed from APS page in this research.

Documents APS asks for

  • Interconnection application formPowerClerk application Gridpol prepares this.
  • Letter of authorization / designated agent formAuthorization Form (DocuSign)
  • Interconnection agreementSigned by customer of record and system owner (DocuSign)
  • Site plan / site layoutShow SES/meter, inverter(s), utility disconnect, lock-boxes, walls/gates, North arrow; no copyrighted drawings Gridpol prepares this.
  • Three-line diagramThree-line diagram for inverter systems (one-line acceptable for residential single-phase load-side connection) Gridpol prepares this.
  • Customer signatureConsumer Acknowledgement (A.R.S. §44-1763) and Disclaimer (rooftop solar)
  • Other utility-specific document (when applicable)Executed contract (residential buy/finance/lease) incl. total system cost incl. permit
  • Battery spec sheet (when applicable)Battery spec: DC voltage, Ah, efficiency, UL listings
  • Final inspection sign-offGreen tag/permit clearance; if AHJ doesn't inspect: notarized APS Letter-in-Lieu of Electric Clearance
  • Other utility-specific document (when applicable)CT enclosure approval; UL field inspector letter + sticker photo for taps

How the APS process runs

  1. Installer submits PowerClerk application with required documents
  2. APS reviews: requests revisions or approves - system may be built
  3. Installer uploads final docs (green tag/clearance, CT approval, UL letter)
  4. APS reviews final docs and schedules inspection/meter set; verifies field matches diagrams
  5. APS grants PTO (door hanger + email) or lists items to fix

Size levels and limits

LevelUp toNote
Pre-application recommended≥500 kW-AC aggregate
>1 MWcontrol schematics, relay settings, sequence of operations

Storage, EV and stamps

Battery storage

Energy storage systems must submit battery specification sheets; governed by APS Interconnection Requirements manual.

PE stamp

Commercial: one-line/three-line stamped by AZ-registered electrical PE. Residential: only when APS requires in writing (or AHJ-issued building permit accepted). – PE-stamped drawings are not included in Gridpol.

Common issues the utility lists

  • Illegible applications or not meeting Interconnection Requirements manual
  • Copyrighted/proprietary/confidential drawings not accepted
  • Field conditions not matching approved diagrams at meter set

Gridpol’s pre-submission check covers these before we file.

Sources

Other utilities in Arizona

All Arizona 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