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Electric cooperative

Clay-Union Electric Corporation interconnection application

Clay-Union Electric Corporation is an electric cooperative serving 3,917 customers in South Dakota (EIA-861, 2025). Gridpol files Clay-Union Electric Corporation 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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South Dakota’s commission rule (ARSD 20:10:36 (Small Generator Interconnection)) does not bind electric cooperatives; Clay-Union Electric Corporation sets its own interconnection policy. We confirm its form on the first project. Electric cooperatives and municipal utilities are not rate-regulated by the PUC and set their own interconnection and buyback policies.

Clay-Union Electric Corporation at a glance

Utility

Clay-Union Electric Corp

Type

Electric cooperative

EIA utility ID

3716

Customers

3,917 (EIA-861, 2025, short form: all customer classes)

Net-metered residential customers

none reported

Service territory

5 counties in South Dakota

Wholesale supplier / association

Basin Electric Power Cooperative

Documents Clay-Union Electric Corporation 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 Clay-Union Electric Corporation. We confirm Clay-Union Electric Corporation’s exact list on the first project.

South Dakota interconnection rule

Commission

South Dakota Public Utilities Commission

Interconnection rule

ARSD 20:10:36 (Small Generator Interconnection) – Small Generator Facility Interconnection · source

Applies to

Public utilities (PUC rate-regulated IOUs: Xcel/NSP, Black Hills, NorthWestern, MDU, Otter Tail) for facilities <=10 MW not under FERC/RTO jurisdiction

Application form

Commission tier application forms (application forms available from the commission, 20:10:36:33); certificate of completion; interconnection agreement

Timelines

Tier 1: acknowledgment within 3 business days, completeness within 10 BD, applicant 20 BD to cure, review within 15 BD after complete (20:10:36:33). Completion requires passed screens, code inspector approval, witness test if done, certificate of completion, executed agreement (20:10:36:34).

Fees

Tier 1 $50; Tier 2 $50 + $1/kW up to $500; Tier 3 and 4 $100 + $2/kW up to $1,000 (20:10:36:06).

Insurance

Tier 1: proof of adequate homeowners/general/commercial liability; Tier 2 up to $500,000; Tiers 3-4 up to $1,000,000 at utility request (20:10:36:26). Endorsements (utility additional insured etc.) not required for residential <=10 kW (20:10:36:27).

External disconnect

Only if required by the utility: primary-line lockable visible-break device; secondary-line lockable device with clearly indicated status; lockbox alternative (20:10:36:15).

Export compensation

None statewide
No statewide net metering rule; compensation per utility tariff (e.g. avoided-cost/PURPA).

Not bound by the rule

Electric cooperatives and municipal utilities are not rate-regulated by the PUC and set their own interconnection and buyback policies.

Other utilities in South Dakota

All South Dakota 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