Rate class drift after a store remodel or refrigeration upgrade
A remodel changes the load, but the rate schedule on the account may not follow. How to spot a site billed on the wrong class after a capital project.
Vikram Rao · June 9, 2026 · 6 min read
Key takeaways
- Rate schedule eligibility usually depends on measured demand or connected load, so a capital project can move a site across a threshold.
- Some utilities reassign classes automatically on a review cycle; others wait for the customer to request the change.
- Compare each account's trailing 12-month peak demand to its schedule's eligibility range after any remodel, new refrigeration, or LED retrofit.
Schedules are built around a load profile
Commercial tariffs divide customers into classes by size. The dividing line is typically peak demand in kilowatts, sometimes connected load or annual energy use, and sometimes a combination. A small general service schedule might serve customers below a demand threshold and charge mostly on energy. A medium or large schedule above that threshold uses demand charges and often time-of-use periods. The thresholds are set by each utility and appear in the eligibility section of the tariff.
Customers are assigned to a class when service starts. After that, whether the assignment is revisited depends on the tariff and on the utility's practices. Some tariffs say the utility will review a customer's class annually based on the highest demand in the prior 12 months. Others place the burden on the customer.
How a capital project moves the load
A grocery remodel that adds open-case refrigeration and a new compressor rack can raise peak demand by 30 kW to 80 kW. A convenience store that adds a foodservice kitchen does the same. A refrigeration upgrade to higher-efficiency compressors can go the other way and lower peak demand enough to drop a site beneath the floor of its current schedule.
Either direction creates drift. If demand has risen across a threshold and the account stays on the smaller schedule, the customer may be undercharged and exposed to a utility correction. If demand has fallen and the account stays on a larger schedule, the customer pays demand charges and fixed charges that no longer fit. The second case is the refund opportunity.
What to compare after a project closes
The check is simple in principle. Take the account's highest 15-minute demand for each of the last 12 months. Find the eligibility criteria for the schedule the account is on, and for the neighboring schedules. If the account's demand history fits a different schedule better, build a comparison of what the last 12 months would have cost under each.
Be careful with the comparison. Different schedules may have different seasonal structures, minimum charges, ratchets and time-of-use windows, and some are optional while others are mandatory above a threshold. A cheaper-looking schedule that carries a long minimum contract period or restricts other programs may not be better. The comparison must use the full tariff, not just the headline rate.
Making the change and claiming the difference
Where the tariff says the utility must assign the correct class and did not, a request to move the account and a claim for the difference over the lookback period is appropriate. Where the tariff says the customer must request the change, retroactive relief is limited, often to the date of the request or a short period before. In that case the lesson is speed.
Add a trigger to the capital project process: when facilities closes a refrigeration or electrical project, a rate review for each affected account is a close-out task. It takes an hour per site and prevents a year of drift.