Cost of conserved energy (CCE) curve; x-axis = Savings Potential (TWh/year), y-axis = Cost of Conserved Energy (2007$/kWh);Savings potential = 567 TWh, 30% of reference case.

In this cost of conserved energy (CCE) curve, technical and economic analysis suggests that energy efficiency measures cost less than the electricity they save, meaning that they will more than pay for their initial investment over their lifetime.