If the deposit is in the form of a Letter of Credit, Surety Bond, or other form of acceptable funding, the projects will be invoiced monthly for the work performed.

Projects that enter the Cluster must provide Commercial Readiness Deposits at different stages of the study process, as outlined in LGIP Sections 3.4.2(vi), 7.5, 8.1, and 11.3. During the Cluster Request Window, the required deposit is two times (2x) the Study Deposit. After the Cluster Study, or any subsequent restudy issued, the deposit increases to 5% of the assigned Network Upgrade costs. To execute the Facilities Study Agreement, the deposit will increase to 10% of the assigned Network Upgrade costs identified in the most recent Cluster Study or Restudy Report. To execute a LGIA, the deposit must equal 20% of assigned Network Upgrade costs, minus any Commercial Readiness Deposits already paid.

No. Distribution Upgrades are not reimbursable.

Following Commercial Operation, eligible reimbursable Network Upgrade and Stand Alone Network Upgrade costs are generally repaid through Transmission Credits under Article 11.4 of the LGIA and Article 5.2.1 of the SGIA. Full reimbursement does not extend beyond 20 years from the Commercial Operation Date (COD).

Yes, suspended projects are included.

As per LGIP Section 4.4.1, prior to the execution of the Cluster Study Agreement, a decrease of up to 60% of electrical output (MW) of the proposed project, through either a decrease in plant size or a decrease in Interconnection Service level will be allowed. As per LGIP Section 4.4.2, prior to the execution of the Facilities Study Agreement, a decrease of up to 15% of electrical output of the proposed project through either a decrease in plant size or a decrease in Interconnection Service level will be allowed. As per Section 4.4.1, for any increase in electrical output, these will be considered as a new application and thus can be submitted during the next Cluster Study Window.

The major milestones in the Cluster Study Process can found in Idaho Power’s Generation Interconnection Process Flow Charts.

Idaho Power may evaluate certain POI changes during the Customer Engagement Window and communicate any needed modifications and alternative POIs during this time. The ability to modify a POI ends upon execution of the Cluster Study Agreement. Modifications after execution of the Cluster Study Agreement constitute a Material Modification pursuant to LGIP Section 4.4. Please review Idaho Power’s Generation Interconnection Business Practices, Section 4 additional POI modification information.

Following issuance of the Cluster Study Report or Cluster Restudy Report, Interconnection Customers will participate in a Cluster Study Meeting. Projects electing to proceed are required to provide updated Site Control documentation and increase their Commercial Readiness Deposit, referred to as “Decision Point 1”. Idaho Power will then determine whether a Cluster Restudy is required. If no Cluster Restudy is required, Idaho Power will issue a Facilities Study Agreement and proceed to the next phase of the study process. Please refer to Idaho Power’s Generation Interconnection Process Flow Charts for additional information regarding study milestones and timelines.

Idaho Power does not currently have any proposed processes that include a resource solicitation cluster.

Idaho Power will notify the Interconnection Customer if a potentially impacted Affected System is identified during the interconnection study process. Idaho Power will also provide contact information for the Affected System, as applicable. The Affected System will determine whether additional studies are required and may perform studies under its own tariff, procedures, and timelines. Any required Affected System Upgrades and associated agreements will be administered in accordance with the applicable tariffs and interconnection procedures.

If another Transmission Provider identifies Idaho Power as a potentially impacted Affected System, Idaho Power will review the information provided and determine whether an Affected System Study in necessary. If an Affected System Study is required, Idaho Power will coordinate with the applicable Transmission Provider and Interconnection Customer in accordance with Idaho Power tariff and interconnection procedures. The expected timelines and procedures can also be found in Idaho Power’s Flowchart.

Construction timelines vary based on the facilities required to interconnect a project. For a typical Large Generator Interconnection project at the time of this answer (Q3 2026), Idaho Power often estimates approximately 4 to 5 years from execution of the Generator Interconnection Agreement (GIA), funding, and Notice to Proceed, Additional permitting requirements, including federal land permitting through agencies such as Bureau of Land Management (BLM), transmission line construction, environmental reviews, or procurement of long-lead equipment such as transformers may extend project schedules beyond this timeframe. For current estimates, please reach out to the Generator Interconnection team (generatorinterconnection@idahopower.com).

Procurement timelines for major electrical equipment, including breakers, transformers, reactors, series capacitors, and communications equipment, vary based on manufacturer availability, production, capacity, and market conditions. Because lead times frequently, Idaho Power does not publish fixed procurement timelines. The most current assumptions applicable to a project will be evaluated during the Facilities Study process.

A TSR is used to request transmission service across Idaho Power’s transmission system. Idaho Power’s OATT requires Transmission Customers to submit TSRs requesting the right to deliver electricity to any specific POD. A TSR is required separately and independently from a GIA or from any offtake agreement – that a project may enter into with Idaho Power or another entity. Additional information about requesting transmission service is available at https://www.idahopower.com/energy-environment/energy/delivering-power/transmission-planning-and-services/ or on OASIS.

An offtake agreement is an agreement under which a generating facility agrees to sell its output to another entity, and that entity agrees to purchase it. For purposes of these FAQs, offtake agreements may include Energy Sales Agreements (ESA) under the Public Utility Regulatory Policies Act of 1978 (PURPA); Power Purchase Agreements (PPA) not under PURPA; Battery Service Agreements (BSA) under which an entity pays for the right to use (charge and discharge) a battery energy storage system; or other applicable agreements. If a project enters into an offtake agreements with Idaho Power, Idaho Power may act as the Transmission Customer and submit the TSR for delivery of the project’s output (for BSAs, for delivery of the charging and discharging energy). If a project has not entered into an offtake agreement with Idaho Power, and wants to transmit energy across Idaho Power’s system, the project must act as the Transmission Customer and submit the TSR or engage with another Transmission Customer to do so. Additional information regarding offtake agreements can be obtained from the applicable Idaho Power department by emailing EnergyContracts@idahopower.com.

Yes. A TSR is required for any transmission service, independent of the GI Process and Selection of NRIS in the GI Process does not provide transmission service rights. For the avoidance of doubt, the TSR may identify additional upgrades not identified in the Generator Interconnection Process.

Unless interconnection customer specifically requests grid-charging not be evaluated, any Project with an ESS component will be evaluated during the Cluster Study for grid-charging and identify the interconnection, transmission or distribution facilities necessary to interconnect such that grid-charging can be achieved from an interconnection perspective. The grid-charging results do not convey any right to transmission service for, nor constitute an agreement to allow, the ESS to charge from the grid.

In order to charge and discharge a standalone ESS, the ESS operator would need to either (1) enter into an offtake agreement with Idaho Power, in which case Idaho Power may act as the Transmission Customer and submit the required TSRs, as discussed above; or (2) submit TSRs for transmitting the charging and discharging energy across Idaho Power’s system.

PowerClerk is Idaho Power’s online application and project management platform used for certain Generator Interconnection processes.

At this time, PowerClerk is available for customers participating in Idaho Power’s Annual Cluster Study Process (Cluster 2 and later) and customers submitting a Generator Interconnection Pre-Application. Idaho Power will expand PowerClerk functionality and availability in the future.

For projects managed through PowerClerk, Idaho Power uses PowerClerk as the primary method of communication. Notifications regarding study activities, deficiencies, requested information, project milestones, and other correspondence will be sent to the Primary and Secondary contacts elected by Interconnection Customer by Interconnection Customer within the platform. Interconnection Customers may also log into PowerClerk to view project information, document submissions, and history of communications associated with their project. Interconnection Customers are responsible for maintaining current contact information and monitoring communications from PowerClerk throughout the study process.