The PCAC (Power Cost Adjustment Clause) is the difference (greater or less than) between the current power cost and the base power cost. The base power cost is our power suppliers’ electric rate, which is what our rates are based on. The current power cost is the cost of producing power for a given billing period from any and all generators currently supplying power to our power supplier. The PCAC fluctuates due to costs associated with producing power at the generators for consumption. Therefore, depending on overall energy consumption, the PCAC rate may be a credit or a debit from month-to-month. The PCAC is reported to and monitored by the WI Public Commission Service (PSC). The PSC is an independent regulatory agency dedicated to serving the public interest. The agency is responsible for the regulation of Wisconsin public utilities, including those that are municipally owned.