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Investor-owned utility

Ajo Improvement Company interconnection application

Ajo Improvement Company is an investor-owned utility serving 808 residential customers in Arizona (EIA-861, 2025). Gridpol files Ajo Improvement Company 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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Partly researched from official sources. Verify on first project: no Ajo Improvement Company website, application form, interconnection manual or tariff found (web search budget exhausted during this pass); ACC jurisdiction over Ajo assumed from prior entry, not confirmed. Only state rules (A.A.C. Title 14 Ch. 2 Art. 23/26) read. Portal, documents list, fees, tariff and steps must come from the utility.

Ajo Improvement Company at a glance

Utility

Ajo Improvement Co

Type

Investor-owned utility

EIA utility ID

176

Residential customers

808 (EIA-861, 2025)

Net-metered residential customers

18 (EIA-861, 2025)

Service territory

1 county in Arizona

Who submits

Per A.A.C. R14-2-2604 (applies to ACC-jurisdictional public service corporation utilities): customer may designate a Representative to act on its behalf and may e-sign when submitting electronically; customer must execute an Interconnection Agreement before interconnecting. Utility-specific form not found.

Review time (official)

A.A.C. Art. 26: completeness notice within 7 calendar days (R14-2-2614(D)); Level 1 Super Fast Track determination within 14 calendar days after completeness notice; Level 2 Fast Track 21 calendar days; deficient application: applicant has 30 calendar days to respond; after approval, IA sent within 7 days, site inspection within 7 days when required, determination within 3 days of inspection and signed documents (R14-2-2621).

Documents Ajo Improvement Company asks for

  • Interconnection application formUtility's standard Application form/format with supplemental documents listed in its instructions (R14-2-2614(B)); utility form not found Gridpol prepares this.
  • Interconnection agreementExecuted Interconnection Agreement before interconnection (R14-2-2604(F)); may be required with application or sent within 7 days of approval (R14-2-2621)
  • Final inspection sign-off (when applicable)Final electrical clearance from AHJ if required by utility (R14-2-2621(A)(2))
  • UL 1741 / IEEE 1547 certification (when applicable)Level 1 requires Certified Equipment; Expedited (non-export storage / inadvertent export) requires UL 1741 and UL 1741SA-listed equipment

Fees

FeeApplies toNote
Application, additional review, site inspection, meteringACC rules allow these fees only if in a Commission-approved utility tariff; no Ajo tariff found

Utility fees are paid by the installer or customer; they are not part of the Gridpol plan.

Size levels and limits

LevelUp toNote
Level 1 Super Fast Track (R14-2-2617)20 kWInverter-based, Certified Equipment only; must meet screens R14-2-2615(A),(E),(F)
Expedited Interconnection Process (R14-2-2623)20 kWInadvertent-export facilities <=20 kW; non-exporting inverter-based storage up to 500 kW aggregate nameplate
Level 2 Fast Track (R14-2-2618)2000 kW<2 MW, screens R14-2-2615(A)-(J), 21 calendar day review

ACC interconnection rules (Art. 26, eff. 25 Feb 2020) apply to utilities that are public service corporations under Ariz. Const. Art. 15 Sec. 2.

Storage, EV and stamps

Battery storage

A.A.C. R14-2-2623: non-exporting inverter-based energy storage (aggregate nameplate <=500 kW, UL 1741/1741SA, capacity <25% of service entrance rating and <50% of transformer rating, or output <50% of verifiable minimum load) may use the Expedited Interconnection Process.

Common issues the utility lists

  • Application missing documents/information required by the utility -> may be deemed withdrawn if not supplied within 30 calendar days (R14-2-2614(D))
  • Design not meeting R14-2-2615 screens or utility interconnection requirements -> application deemed incomplete/not approved (R14-2-2617)

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

Sources

Arizona interconnection rule

Commission

Arizona Corporation Commission (ACC)

Interconnection rule

A.A.C. R14-2-2601 through R14-2-2628 (Title 14, Ch. 2, Article 26) – Interconnection of Distributed Generation Facilities · source

Applies to

Generating facilities operating in parallel with the distribution system of an ACC-jurisdictional utility (public service corporations: IOUs such as APS, TEP, UNS Electric, and electric cooperatives; cooperatives may use Commission-approved Interconnection Manual timelines per R14-2-2627). Not SRP or municipal utilities (not ACC-jurisdictional).

Application form

Utility-specific application 'on a form provided by the Utility, or according to a format provided by the Utility' (R14-2-2614); utility Interconnection Manuals required (R14-2-2628).

Timelines

Completeness review 7 calendar days (applicant has 30 days to cure). Level 1 review 14 days, Level 2 review 21 days. Interconnection agreement sent within 7 days of approval; site inspection within 7 days of request; approval/failure notice within 3 days after inspection and signed documents; re-inspection within 14 days; application may be deemed withdrawn if not interconnected within 180 days of approval (R14-2-2614, -2617, -2618, -2621). Non-exporting storage and inadvertent-export systems <=20 kW exempt from R14-2-2614 application requirements; Expedited process in R14-2-2623.

Fees

Application/processing, additional-review, inspection and metering fees only if contained in a Commission-approved tariff (R14-2-2614, -2617, -2618, -2621). Customer pays required utility facility/equipment modifications.

Insurance

Utility shall not require general liability insurance as condition of interconnection, nor a particular insurer (R14-2-2607); exception: RUS-financed utilities (cooperatives) may require liability insurance to the extent needed for RUS obligations.

External disconnect

If required by the utility, customer installs a visual-open, manually operated, load-break disconnect switch isolating all ungrounded conductors (gang-operated for multi-phase); utility may add requirements in its Interconnection Manual (R14-2-2624). Inspection checks 24-hour utility access to disconnect (R14-2-2621).

Export compensation

Net billing – A.A.C. R14-2-2301 et seq. (Net Metering rules, eff. 2009); ACC Decision No. 75859 (Jan. 3, 2017)
Decision 75859 replaced retail net metering for new customer-generators of ACC-regulated utilities with an export rate initially set by the Resource Comparison Proxy (RCP) methodology, changes limited to 10%/year; existing NEM customers grandfathered. Exact implementation is utility-tariff specific (APS, TEP, UNSE RCP riders). Details from secondary summaries; decision text not retrieved.

Not bound by the rule

Electric cooperatives are bound by Article 26 but may substitute timelines via Commission-approved Interconnection Manuals and must use best reasonable efforts to meet deadlines (R14-2-2627). SRP and municipal utilities are not ACC-regulated and follow their own interconnection and export-rate policies.

Other utilities in Arizona

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

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