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Illinois Passes Bill To Require Long-Term Resource Adequacy Contract Procurement For All Retail Customers

Mandates Retail Suppliers Use TOU Rates If Serving Certain Customers


November 4, 2025

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Copyright 2025 EnergyChoiceMatters.com
Reporting by Paul Ring • ring@energychoicematters.com

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Both Illinois houses recently passed and enrolled SB 25 which, among other things, requires the Illinois Power Agency to include in its procurement plan, "the procurement of energy, capacity, environmental attributes, resource adequacy attributes, or some combination thereof intended to serve all retail customers."

SB 25 awaits action by the governor

Specifically, the plan shall feature long-term contracts and, "shall be structured to facilitate new and additive supply resources[.]"

The procurement, "shall be sized to ensure that the substantial majority of any load-serving entity's supply portfolio is not composed of contracts awarded," under the resource adequacy procurement

Contracts may take the form of a sourcing agreement, power purchase agreement, or other instrument as determined by the ICC in approving the plan, and may feature fixed or variable pricing structures, including utilization of a contract for differences in pricing structure, SB 25 states

"Contracts may feature both electric utilities and alternative retail electric suppliers as counterparties," SB 25 states

In the approval of any such resource adequacy contract, SB 25 provides that the ICC, "shall prioritize structures that ensure stable, reliable, and competitively neutral allocations of costs and responsibilities."

"Purchases made under [such] contracts ... shall be funded in a competitively neutral manner as determined by the Commission in approving the plan," SB 25 further states

"To meet contract obligations, the Commission may order collections from all retail customers or from all load-serving entities, including alternative retail electric suppliers as defined in Section 16-102 of this Act, as a means of ensuring a fair and competitively neutral allocation of contract costs," the bill states

"In establishing collections, the Agency may propose and the Commission may approve adjustments for load-serving entities that have contracts entered into before the effective date of this amendatory Act of the 104th General Assembly for energy, capacity, or environmental attributes to ensure customers are not double-billed for the same service," SB 25 states

While SB 25 specifically cites the allocation of costs in a competitively neutral manner, the bill is not as explicit as to the disposition of any resource adequacy products procured under the plan, especially those products for which a nonbypassable charge is imposed

The use of the Illinois Power Agency procurement plan to address policy goals in a competitively neutral manner has been undertaken previously, in removing renewable portfolio obligations from the competitive side of the bill, and undertaking the renewable procurements on behalf of all delivery customers

SB 25 also directs the ICC to develop an integrated resource plan

Retail electric suppliers will be obligated to provide information to the ICC to inform the development of such plan

Specifically, an alternative retail electric supplier shall provide information related to the resource needs of its customers located in an electric utility's service territory

SB 25 also requires a study of whether Illinois should develop a state-specific ISO, or should consolidate all of its utilities into a single RTO, either PJM or MISO, or should maintain the current structure

Among other things, such RTO study shall consider the capacity market benefits and costs of separating from the PJM and MISO territories versus those of the status quo

The ICC and the Illinois Power Agency shall publish the joint final RTO policy study no later than December 1, 2026

SB 25 also requires that an energy storage system or vehicle storage system eligible for net metering under the bill must be served under, as more specifically described below, an hourly or TOU supply rate structure, including when served by a retail electric supplier, if such storage system elects net metering

The bill provides that:

An energy storage system or vehicle storage system eligible for net metering under this subsection may be interconnected behind the meter of a retail customer or at the distribution system level of an electric utility as follows:

(A) if the energy storage system or vehicle storage system is interconnected behind the meter of a retail customer, in order to receive net metering under this subsection, the eligible customer behind whose meter the energy storage system is interconnected must receive service from an electricity provider under an hourly supply tariff, a time-of-use supply tariff, or a time-of-use contract with an alternative retail electric supplier; or

(B) if the energy storage system or vehicle storage system is interconnected at the distribution system level of an electric utility and not behind the meter of a retail customer, the energy storage system or vehicle storage system must receive service from an electricity provider as a retail customer under an hourly supply tariff authorized by Section 16-107, a supply tariff or contract on substantially similar terms and conditions with an alternative retail electric supplier, a time-of-use supply tariff, or a time-of-use supply contract with an alternative retail electric supplier.

Concerning the development of an integrated resource plan noted above, the IRP shall include, among other things, an evaluation of the future electric resource needs in each electric utility's service area for periods of at least 5, 10, 15, and 20 years

The IRP shall also include an analysis of all generation and energy resource options available to meet the plan's range of load forecasts with a focus on the first period of at least 5 years covered by the plan, including an analysis of existing supply found within each electric utility's service area and new supply expected to come online across that period of at least 5 years

The IRP shall include recommendations for how State policy should serve to facilitate the development of new resources

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