What is the only form of energy whose price has remained relatively stable for the past 40 years?

The answer: Off-peak electricity, CALMAC CEO Mark MacCracken told Breaking Energy in a recent interview. CALMAC is a thermal energy storage company that uses off-peak electricity to freeze ice overnight. During the day, the power is gradually released to replace air conditioning which generally draws power from the grid during peak and most expensive electricity demand hours. Keep reading →