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Investor-owned utility

TEP interconnection application

TEP is an investor-owned utility serving 416,268 residential customers in Arizona (EIA-861, 2025). Applications: PowerClerk (TEP PowerClerk). Gridpol files TEP 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 TEP’s official sources (see below). Fees and review timelines not stated on page.

TEP at a glance

Utility

Tucson Electric Power Co (UNS Energy (Fortis))

Type

Investor-owned utility

EIA utility ID

24211

Residential customers

416,268 (EIA-861, 2025)

Net-metered residential customers

54,718 (EIA-861, 2025)

Service territory

2 counties in Arizona

How to apply

PowerClerk – TEP PowerClerk · official link

Who submits

Solar installers must submit on customer's behalf via PowerClerk (installer login only; New Installer Packet to renewables@ address). Customer signs Interconnection Agreement.

Export compensation

Net billing – Resource Comparison Proxy (RCP) export rate
Rate locked at application date (resets annually 1 Oct) for 20-year term; TOU or Demand TOU plan required.

Documents TEP asks for

  • Interconnection application formInterconnection Application in PowerClerk with drawings (DG Drawing Checklist) Gridpol prepares this.
  • Interconnection agreementCustomer signs; Level 1 via DocuSign, Level 2/3 by e-sign/email
  • Photos (meter, main panel, equipment)As-built photos after installation
  • Other utility-specific documentNotice of (Installation) Completion / Installer System Commissioning Form
  • Other utility-specific document (when applicable)Modification Request Form for major changes; Landlord Authorization; Meter Socket Adapter Signature Form
  • Final inspection sign-offInstaller secures permits, inspections and clearances

How the TEP process runs

  1. Installer submits application in PowerClerk
  2. Utility Renewables review and approval (no construction before approval)
  3. Customer signs Interconnection Agreement
  4. Installer obtains permits/inspections; schedule power kill in PowerClerk if needed
  5. Submit completion notice/commissioning form + photos
  6. Utility sets production/billing meter and leaves door hanger granting PTO

Size levels and limits

LevelUp toNote
Level 120 kW≤20 kWac
Level 2/3>20 kWac

Storage, EV and stamps

Battery storage

Battery systems per SR-710 Distributed Energy Storage Systems (single-phase).

Common issues the utility lists

  • Missing material kit components -> meter set rejection
  • Construction before approval
  • More than one DG meter socket
  • Major modification without approved Modification Request
  • Wrong installation type (expansions must be flagged)
  • No electrical inspection release for power kill
  • Site access issues / electrician absent at power kill
  • Missing #1 label on main service disconnect

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