Mike D from Raleigh. Client's 15-minute interval data shows one interval at 410 kW in a month when every other interval was below 180 kW. Utility says the reading is correct. I think it is a meter artifact. How do you make the case that a single outlier is not a valid billing demand?
Single anomalous demand reading — how to dispute
Walt. Request raw interval data from the utility's meter data management system, not just the billing summary. If there is a malfunction the raw data sometimes shows surrounding anomalies too.
Terry. Also ask for meter test records. Utilities are required to test commercial meters periodically. If the meter was overdue that supports the reliability argument.
The raw interval data shows the spike as a single point with no surrounding anomalies. The utility says an isolated spike is consistent with a large motor start.
Derek. A 128 percent spike from a 180 kW baseline in a single 15-minute interval is physically unusual. Ask the utility what specific equipment could have caused that exact magnitude.
They could not name a specific piece of equipment. That inability weakens their position significantly.
File a formal meter accuracy complaint with the PUC. The burden should shift to them to prove the reading is valid.
Jack from Louisville. Had a very similar situation. Filed the PUC complaint and the utility ultimately agreed to remove the anomalous reading after a meter inspection found a loose connection in the instrument transformer circuit.