Increases in the wholesale market price for energy are causing some rates to double and triple.
The purpose of the investigation is not to point the finger, but to see if any improvements can be made predicting or handling power outages.
Utility regulators voted on Thursday to fine Pennsylvania’s largest gas utility $500,000 for a 2011 natural gas explosion that killed five people in Allentown and called the company’s safety record “downright alarming.”
Power industry officials say they have installed new technology aimed at combating the danger of overheating linked to new electric meters in homes served by PECO.
Including both business and residential customers, about 9.4 percent of PECO customers have switched suppliers; representing about 40 percent of the utility’s load.
State regulators have approved a base rate increase for PGW that is much lower than what the city-owned gas utility requested.