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Investor-owned utilityAlliant Energy (Iowa) interconnection application
Alliant Energy (Iowa) is an investor-owned utility serving 419,451 residential customers in Iowa (EIA-861, 2025). Applications: PowerClerk (Alliant Energy Connect PowerClerk). Gridpol files Alliant Energy (Iowa) 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 Alliant Energy (Iowa)’s official sources (see below). Fee from IUC standard Iowa Level 1 form ($125); confirm Alliant charges same. Storage-specific rules not extracted.
Alliant Energy (Iowa) at a glance
Interstate Power and Light Co (Alliant Energy)
TypeInvestor-owned utility
EIA utility ID9417
Residential customers419,451 (EIA-861, 2025)
Net-metered residential customers12,379 (EIA-861, 2025)
Service territory84 counties in Iowa
How to applyPowerClerk – Alliant Energy Connect PowerClerk · official link
Who submitsInstaller usually submits on customer's behalf; customer may apply in PowerClerk or mail application + fee to Alliant Energy Renewable Hotline, GO-17, P.O. Box 351, Cedar Rapids IA 52406-0351. Design pre-check tool: dgassist.alliantenergy.com.
Export compensationNet billing – Inflow/Outflow billing (Rate Code IO, Sheet 42)
For installations after 12/30/2020; older Net Metering Pilot (NM) and CSPP frozen
Completeness review within 10 business days (Alliant solar guide); further durations by level per 199 IAC 45.
Documents Alliant Energy (Iowa) asks for
- Interconnection application formIowa Standard Interconnection Request Application (Level 1 or Level 2-4) Gridpol prepares this.
- Proof of insuranceGeneral liability; facility address, customer as insured
- Single-line diagram (one-line)Must show lockable visible disconnect adjacent to Alliant meter Gridpol prepares this.
- Site plan / site layoutPlot plan showing meter location relative to disconnect Gridpol prepares this.
- Inverter spec sheetManufacturer specs + NRTL label info
- PV module spec sheetManufacturer data sheet of the modules.
- Interconnection agreementSigned by customer and installer
- Final inspection sign-offSigned state electrical inspection form before metering
- Other utility-specific documentCertificate of Completion; Attachment 2 if applicable
How the Alliant Energy (Iowa) process runs
- Research/usage history
- Installer submits application, documents and fee in PowerClerk
- Application review (accepted or resubmit)
- Engineering review; written cost estimate to accept
- Sign interconnection agreement and forms
- Install; pass state electrical inspection; witness test if required; metering
- Alliant sends signed agreement + Certificate of Completion = PTO (do not operate before)
Fees
| Fee | Applies to | Note |
|---|---|---|
| $125 | Level 1 (≤20 kVA, lab-certified inverter) | Iowa IUC standard Level 1 form; witness test may add cost-based fee ≤$125 (199 IAC 45.5(10)) |
Utility fees are paid by the installer or customer; they are not part of the Gridpol plan.
Size levels and limits
| Level | Up to | Note |
|---|---|---|
| Level 1 | 20 kW | ≤20 kVA, Iowa 199 IAC 45 |
| Level 2-4 | 10000 kW | ≤10 MVA (Iowa standard forms); Alliant cites IAC rules up to 20 MW |
Storage, EV and stamps
Battery storage
Not addressed on Alliant Iowa page; Alliant DER Technical Interconnection Requirements (eff. 12/1/2025) apply.
Common issues the utility lists
- Incomplete application or missing fee
- Unsigned documents / missing payment
- Insurance proof lacking required details
- One-line without lockable visible disconnect adjacent to meter
- Plot plan not showing meter vs disconnect
- Unreported material modifications
- Operating before PTO
- Inverter left on Constant PF instead of Volt-VAR slows review
Gridpol’s pre-submission check covers these before we file.
Sources
- Alliant Energy Customer Interconnection – Iowa: https://www.alliantenergy.com/ways-to-save/customer-interconnection/iowa (retrieved 2026-11-13)
- Alliant DER Technical Interconnection Requirements (eff. 12/1/2025): https://www.alliantenergy.com/-/media/alliant/documents/ourenergy/customerinterconnection/dertechnicalinterconnectionrequirements.pdf?la=en&sc_lang=en&hash=C7E2AC7A7DB4D8D8134C243D1068398E (retrieved 2026-11-13)
- Iowa standard Level 1 Interconnection Request form (IUC form, as hosted by MidAmerican): https://www.midamericanenergy.com/media/pdf/iowa-level1-interconnectionrequest.pdf (retrieved 2026-11-13)
Other utilities in Iowa
- MidAmerican Energy639,558
- Corridor Energy Cooperative30,992
- City of Ames25,123
- Eastern Iowa Light & Power Cooperative20,472
- Cedar Falls Utilities17,746
- Midland Power Cooperative12,083
- Maquoketa Valley Rrl Electric Cooperative11,161
- Board of Water Electric & Communications10,105
- Iowa Lakes Electric Cooperative9,757
- North West Rural Electric Cooperative9,461
$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.