Auto Dealership Energy Procurement in Illinois

Auto dealerships are a mixed-use energy account: bright showrooms and lots, extensive HVAC, a service shop full of equipment, and — increasingly — EV charging. For Illinois dealerships and auto groups, procurement plus attention to demand and charging load protects a real operating cost.

Who this is for

Dealer principals, general managers, and controllers at Illinois franchised and independent dealerships, including multi-rooftop auto groups.

The dealership load profile

• Lighting and HVAC — showroom, lot, and service-area lighting plus significant HVAC across large glass-heavy buildings.
• Service-bay equipment — compressors, lifts, and shop tools that add to load and demand.
• Natural gas for space heating, where the gas utility depends on location.
• EV charging (growing) — a rising driver of both energy and peak demand.

A dealership's load is unusual because it blends three different building types under one roof. The showroom behaves like a retail space with long lit hours and large glazed areas that push HVAC hard in both summer and winter. The service department behaves like a light-industrial shop, where compressors, lifts, alignment racks, and diagnostic equipment cycle throughout the day. And the lot behaves like outdoor area lighting that runs from dusk to close, often on a fixed schedule. Because these loads don't all peak at the same moment, the site's demand pattern is shaped less by any single piece of equipment than by how the day stacks up — service bays busy mid-morning, HVAC climbing through the afternoon, lot lighting layering on at dusk.

Demand and capacity mechanics for a dealership

On demand-billed rate classes, the utility measures the highest interval of electricity draw in the month and bills that peak kilowatt (kW) figure separately from the energy you consume. For a dealership, that peak tends to land when service equipment, full HVAC, and lighting overlap. In the ComEd/PJM zone, a facility's capacity tag (PLC) — set by how much the site draws during regional system peak hours — carries that peak forward into the supply cost for an entire delivery year. That is why a single hot summer afternoon can influence a full year of capacity charges. A PJM capacity auction clearing price, worth noting, is not itself a line item on your bill; it flows through the delivery-year and PLC mechanics and the terms of your supply contract. Interval data is what shows whether a dealership's peaks are sharp and addressable or broad and structural.

EV charging changes the demand picture

As EV sales and service grow, charging can raise peak demand and shift a rooftop's rate class or capacity profile. DC fast chargers in particular can add a large block of demand in minutes, and if that block coincides with the existing service-and-HVAC peak, it stacks directly on top of the billed kW. Because uncontrolled charging peaks can add demand charges that exceed the charging energy cost itself, model charging load before installation rather than discovering it on the next bill. Some sites can use scheduling, staggering, or load-management controls to keep charging out of the site's peak window — whether that is feasible depends on how the chargers are used, and interval data is the starting point for evaluating it.

What to watch for

• Rate-class drift after adding load. Adding chargers or expanding a service department can push a rooftop across a demand threshold into a different rate class. Check the class before and after any material load addition.
• Renewal timing across the group. An account that rolls past its contract end date can fall to a month-to-month holdover rate. Track end dates so no rooftop lapses.
• Reliability is a utility matter. Choosing a supplier changes only the supply portion of the bill. Delivery, maintenance, and outage response stay with ComEd or Ameren; on-site backup power is a separate decision, not something a supply contract provides.

Auto groups and portfolios

Multi-rooftop groups are best handled as a grouped multi-location procurement, grouping electricity and gas by utility and aligning renewals across the group. Because a group can straddle ComEd and Ameren electric territories and more than one gas utility, it usually resolves into a few coordinated groups sharing a renewal calendar rather than one master contract. A cross-portfolio view also surfaces rooftops sitting on mismatched rate classes or expired contracts that a single-site look would miss.

Getting started

Provide 12 months of electric and gas bills for a dealership (and interval data where charging is planned), and the account or group can be reviewed and priced on matched terms through the procurement process. No savings figure is promised in advance.