Montgomery County Car Wash Electricity: Multi-Site Guide
Car Washes · Montgomery County, Ohio
Market-reference note: Numerical default-price examples below retain their cited 2026 reference period. They are historical class-level context, not a current account quote. Confirm the applicable business rate, components and effective dates on your bill before comparing an offer. How to establish your benchmark.
Can several car washes in Montgomery County share one electricity contract?
Yes, with one caveat: Montgomery County is served by two investor-owned utilities (AES Ohio and Duke Energy Ohio), and suppliers price each utility territory separately. A single master agreement can still cover every site, with a price column per utility.
Rural sites served by an electric cooperative — Butler Rural Electric Cooperative and Pioneer Electric Cooperative — are in the same position.
Portfolio math for car washes in Montgomery County
Take an illustrative operator with three smaller and two mid-size locations (3,000 ft² and 5,000 ft²):
| Portfolio measure | Estimate |
|---|---|
| Combined annual use | 232,000 kWh |
| Combined capacity tags | about 44 kW |
| Capacity cost at 2026/27 price ($329.17/MW-day) | about $5,299 a year |
| Illustrative tags at the 2024/25 RTO reference ($28.92/MW-day) | about $466 a year |
| Value of each 0.5¢/kWh in supply price | about $1,159 a year |
How these numbers are built: annual use = 12.2 kWh/ft² (EIA CBECS 2018 Table C22, 'Other service' (broad group that includes car washes). Not car-wash-specific.). Peak demand assumes a 30% load factor; the capacity tag assumes 50% of that peak falls in the grid's summer peak hours. Capacity cost uses PJM's 2026/27 clearing price of $329.17/MW-day (about $120 per kW-year) before utility scaling factors. These are illustrations for sizing a decision — your own bills and interval data are what suppliers price.
Utilities and default prices across Montgomery County
| Utility | Small-business default generation price | Cities on this site in the county |
|---|---|---|
| AES Ohio | Varies by rate schedule (on your bill) | Centerville, Dayton, Huber Heights, Kettering, Riverside, Trotwood |
| Duke Energy Ohio | Historical class reference: 11.36¢/kWh (effective June 1, 2026) | — |
Structuring a multi-site contract
- Master agreement with site schedules. Sign one agreement and list each location on a schedule, so opening or closing a car wash is an amendment, not a new negotiation.
- Add/delete rights. Ask for the right to add new locations at the contract price (or a formula) and to remove closed locations without penalty up to a set share of volume.
- Aggregate bandwidth. Measure usage tolerance across the whole portfolio rather than meter by meter, so one busy site doesn't trigger true-up charges.
- Co-terminous end dates. Put every site on the same end date so the next bid covers the full portfolio.
- Aggregation exits. Locations at 700,000 kWh a year or less may be in a community aggregation program; confirm how each will be moved to the new supplier and whether any exit terms apply.
Operating issues specific to car washes
Load comes in bursts as each car passes through, concentrated on weekends and after snow or pollen events. Starting several blower motors at once can set the monthly demand peak.
Across a portfolio, the biggest wins usually come from standardizing settings and comparing sites against each other. For car washes, that means:
- Use soft-starts or VFDs on blower motors and stagger their starts.
- Tune dryer run time to vehicle length and speed.
- Use reclaim-water systems to reduce pumping and heating energy.
Winter salt season can make January–March your busiest months; make sure your contract volume band covers it.
FAQ
Can a car wash operator buy electricity for all Montgomery County locations together?
Yes. A supplier can put every shoppable site under one agreement; expect separate prices for AES Ohio and Duke Energy Ohio accounts.
Which Montgomery County locations can't be included?
Sites served by electric cooperatives (Butler Rural Electric Cooperative and Pioneer Electric Cooperative) generally can't be enrolled with a retail supplier.
How can a car wash lower its demand charge?
Soft-start or VFD blowers and staggered motor starts.
Related: Car washes in Ohio · Montgomery County utilities
Decision worksheet: Montgomery County car wash operations
Price current operations and planned changes separately
Dayton-area growth, building works or altered hours can make historical bills a poor representation of the next term. Identify which changes are committed and which are only possibilities. Obtain a documented supplier response to the changed load rather than silently extending last year’s model.
For a car wash in this market, the useful starting evidence is vehicle-processing peaks separately from winter protection loads. This is a review question, not an assumption that every local facility has the same equipment or schedule. Record what your site actually does, then explain the difference between the historical bill period and the proposed contract term.
| Delivery-utility guide for Montgomery County | Evidence needed before pricing |
|---|---|
| AES Ohio | Confirm the actual account class and contract; service territory is not the same as a county boundary. |
| Duke Energy Ohio | Confirm the actual account class and contract; service territory is not the same as a county boundary. |
The local guide is a starting map, not an address-level enrollment determination. Keep utility bills and account identifiers in the private document package, not the initial website inquiry. The Ohio bill guide explains how to identify the delivery and supply companies.
A car wash review should test these operating questions
- Load separation: identify pumps, blowers, water treatment and freeze protection. Distinguish electricity use from gas, water and other operating costs before comparing a retail electric offer.
- Change case: document tunnel expansion, reclaim equipment or changed winter opening hours. Ask the supplier whether that change affects quoted volume, capacity treatment, demand assumptions or the offer’s validity.
- Comparable performance: track kWh per vehicle with temperature and wash package recorded. A raw dollar-per-month comparison mixes prices and operations; a unit measure needs the operating context beside it.
- Account responsibility: Which freeze-protection loads must remain on overnight? Record the responsible party and who can authorize a contract before asking someone to sign.
- Contract fit: Can seasonal low-volume months be explained before pricing? Ask for the answer in the actual agreement or written offer schedule, rather than relying on a sales summary.
Evidence table for the next decision
| Question for this car wash | Bring this evidence | What a useful answer looks like |
|---|---|---|
| Has the bill risen because of price or operations? | Same-period kWh, peak kW where billed, hours and production/occupancy records | A separation of rate, volume and demand effects; no automatic savings claim |
| Will the next term resemble the last twelve months? | The planned tunnel expansion, reclaim equipment or changed winter opening hours | A base case and a change case, with supplier tolerances shown |
| Are supply offers priced on equal terms? | Start dates, included components, additional fees and offer expiry | One comparison matrix that identifies every excluded or adjustable item |
| Is the site free to enroll when proposed? | Current agreement, renewal notice and actual utility confirmation | A documented timeline that avoids an unintended rollover or early-exit charge |
Portfolio review across Montgomery County
Use a separate row for every property rather than one total for the whole business. Start with Centerville, Dayton, Huber Heights, Kettering, Riverside, Trotwood. A common owner can negotiate a master agreement, but meters still have their own rate classes, delivery utilities, start dates and operational constraints. Do not assume that pooling bills creates a volume discount or makes a municipal meter eligible.
For car washes, preserve kWh per vehicle with temperature and wash package recorded at site level before rolling it into a portfolio dashboard. Otherwise a busy or continuously operating location can hide the cost of an idle one. Align contract end dates only after identifying any early-exit costs, add/delete rights and ownership-transfer provisions.
Turn this into a review request
Use the private comparison and renewal tools for a first pass. They do not submit your figures. If you want help, choose “Offer comparison” or “Renewal planner” on the Ohio inquiry form, identify Montgomery County, and describe the question without account numbers or attachments. A supplier bid follows only if the account and decision support that step.
Primary reference points: PUCO electric-bill definitions, Ohio customer classifications and customer-choice guidance. Operating prompts above are planning guidance, not measured local savings or a claim about a specific customer.