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Electric cooperativeTri-County Electric Cooperative, Inc. (IL) interconnection application
Tri-County Electric Cooperative, Inc. (IL) is an electric cooperative serving 16,203 residential customers in Illinois (EIA-861, 2025). Gridpol files Tri-County Electric Cooperative, Inc. (IL) 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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Tri-County Electric Cooperative, Inc. (IL) is a member of Southern Illinois Power Cooperative, which publishes a model interconnection policy (see below); the Illinois rule (83 Ill. Adm. Code 466) also applies where it covers electric cooperatives. Tri-County Electric Cooperative, Inc. (IL)’s own form is confirmed on the first project.
Tri-County Electric Cooperative, Inc. (IL) at a glance
Tri-County Electric Coop, Inc (IL)
TypeElectric cooperative
EIA utility ID18955
Residential customers16,203 (EIA-861, 2025)
Net-metered residential customers95 (EIA-861, 2025)
Service territory10 counties in Illinois
Wholesale supplier / associationSouthern Illinois Power Cooperative · SIPC Generation Interconnection Process (Interconnection Requests page)
Documents Tri-County Electric Cooperative, Inc. (IL) asks for
- Interconnection application formRequired by the state rule Gridpol prepares this.
- Single-line diagram (one-line)Required by the state rule Gridpol prepares this.
- Site plan / site layoutRequired by the state rule Gridpol prepares this.
- Inverter spec sheetRequired by the state rule
- PV module spec sheetRequired by the state rule
- Battery spec sheetRequired by the state rule
- UL 1741 / IEEE 1547 certificationRequired by the state rule
- Proof of insuranceRequired by the state rule
- Final inspection sign-offRequired by the state rule
- Interconnection agreementRequired by the state rule
- Other utility-specific documentRequired by the state rule
Documents required by the Illinois rule. Tri-County Electric Cooperative, Inc. (IL) may ask for more on its own form; we confirm on the first project.
Illinois interconnection rule
Illinois Commerce Commission
Interconnection rule83 Ill. Adm. Code 466 – Electric Interconnection of Distributed Energy Resources Facilities · source
Applies toElectric public utility distribution companies (ComEd, Ameren Illinois, MidAmerican, Mt. Carmel) for DER <=10 MVA not subject to FERC/RTO jurisdiction (466.10)
Application formStatewide standard forms: Appendix A Level 1 Application and Contract (v8), Appendix B Certificate of Completion, Appendix C Levels 2-4 Application, Appendix D Levels 1-4 Contract, study agreements E-G
TimelinesLevel 1: completeness 7 BD, applicant cure 10 BD, screens 15 BD, applicant 30 BD to sign (+15). Level 2: completeness 10 BD, screens 20 BD, agreement 5/30/45 BD depending on upgrades, supplemental review 30 BD. Witness test within 10 BD of commissioning or deemed waived (App. A); 15 BD notice of commissioning test (466.60(m)).
FeesLevel 1 $50; Level 2 $100+$1/kVA; Level 3 $500+$2/kVA; Level 4 $1,000+$2/kVA (Appendices A and C).
InsuranceLevel 1: proof of current homeowner's or other general liability policy; EDC named additional insured where possible (Appendix A).
External disconnectEDC may require isolation: primary-line lockable visible-break device; secondary-line lockable device with indicated status accessible to EDC; removal of self-contained meter or padlockable draw-out breaker can satisfy it (466.60(i)).
Export compensationNet billing – 220 ILCS 5/16-107.5; 83 Ill. Adm. Code 465
Customers applying/energized on or after 2025-01-01 receive credit only for the electricity supply portion (CEJA); earlier customers grandfathered at full retail; DG rebate under 16-107.6. Applies to electric utilities and alternative retail suppliers.
Municipal utilities and electric cooperatives are not ICC-jurisdictional and set their own interconnection and net metering policies.
- 83 Ill. Adm. Code 466 (LII): https://www.law.cornell.edu/regulations/illinois/title-83/part-466 (retrieved 2026-11-13)
- 466.80 Determining the Review Level: https://www.law.cornell.edu/regulations/illinois/Ill-Admin-Code-tit-83-SS-466.80 (retrieved 2026-11-13)
- Appendix C Levels 2-4 Application: https://www.law.cornell.edu/regulations/illinois/Ill-Admin-Code-tit-83-466-app-C (retrieved 2026-11-13)
- 220 ILCS 5/16-107.5: https://ilga.gov/legislation/ilcs/documents/022000050K16-107.5.htm (retrieved 2026-11-13)
- IPA Power Hour slides (net metering 2025 transition): https://ipa.illinois.gov/content/dam/soi/en/web/ipa/documents/power-hour-7-slides-final.pdf (retrieved 2026-11-13)
Other utilities in Illinois
$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
Applications are typically submitted within 2 business days after complete documents. Utility review times are set by each utility.