Municipal electric systems and cooperatives should not be treated as ordinary ComEd or Ameren retail-choice accounts. Start with the actual utility and its tariffs. Bill analysis, safe demand management, efficiency and the separate gas account may still offer useful review opportunities.
Confirm the account before selecting a product
Use a current bill for the service premises. Identify the delivery utility, commodity, customer class, account holder and applicable tariff. A city name, supplier logo or prior tenant’s information is not a substitute. Check who can authorize a supply change and whether existing contractual obligations must be resolved. Keep account numbers out of a general inquiry.
Understand energy versus power
A 10 kW load running for two hours uses 20 kWh. That does not mean its contribution to billed demand is always 10 kW: meters average power over defined intervals, equipment may overlap, and the tariff may apply other tests. Keep the interval length, billing period and units beside the data. A monthly kWh total describes energy consumption but cannot reconstruct the peak on its own.
Find what actually sets billed demand
Request the tariff definition and compare billed kW with the measured peak. A ratchet can use a prior peak; a contract minimum can create a floor. Capacity obligations in supply contracts may depend on different periods from local utility demand charges. Ask which component an operating change can affect and when. Avoid adding projected demand and capacity savings together unless the evidence supports both independently.
Test changes safely
Use interval data to identify simultaneous loads, then evaluate staggered starts, charging controls and schedules with the people responsible for the site. Protect refrigeration, ventilation, medical loads, production quality and comfort. A measured reduction is useful only if it is repeatable and does not shift a larger cost elsewhere. Keep a change log and compare equivalent operating periods; a quiet month after a production shutdown is not proof of a controls project’s benefit.
A demand-charge example
Illustrative billing inputs: a current billed demand of 100 kW, proposed billed demand of 85 kW and a rate of $12 per kW. The modeled demand-charge difference is $180 for that month. If a ratchet keeps billed demand at 100 kW, that immediate difference would be zero even if a measured peak falls. The calculator therefore asks for billed demand, with exclusions stated next to the output. It does not certify engineering performance or annual savings.
Separate municipal utility service from aggregation
A city-owned electric utility and a community's aggregation program are different arrangements. Aggregation concerns purchasing for eligible accounts; municipal electric service concerns the utility system itself. First identify the actual delivery provider and business tariff. Do not interpret a statewide supplier advertisement as proof of enrollment eligibility.
Verification before acting
Useful review questions remain even when ordinary retail shopping is not available: billed-demand calculation, operating schedules, account configuration and applicable efficiency or distributed-generation programs. Use the provider's current documents. Confirm gas separately because an electric municipal or cooperative pathway does not identify the gas utility or program.
Decide what a review can actually change
A useful review states the problem first: an unclear charge, a supply renewal, a demand peak, seasonal gas exposure or responsibility across multiple meters. Separate opportunities under the account’s actual rules. Do not treat a supply agreement as backup power or a calculator as utility approval. Ask for written explanations when a component or eligibility condition is unclear.
Sources & further checks
Primary references checked for this guide on October 15, 2026. Follow the source for current tariffs, eligibility and program terms; rates here are not live offers.