A customer had realized their electric costs were increasing this summer. We looked into the occurrence within their facility, which shows a couple key points:
This chart represents the past 3 years of metered peak demand (kW) and the AEP-Ohio cost portion of the electric bill (transmission/ distribution costs). The green line of cost data shows this instantaneous use is more of a function of the transmission/ distribution costs than in previous years.
This past summer there was one month (June 2016, 211 kW) with a peak kW which exceeds the previous peak demand. The previous high was set in September 2013 at 236 kW.
So, really there is no one reasons electric bills have risen, but the combination of rate structure increases and equipment operations - poor control, aging equipment, or all these factors together.