Accelerated electricity conservation in Juneau, Alaska: A study of household activities that reduced demand 25%

An avalanche destroyed the main hydroelectric transmission line to Juneau, Alaska in April, 2008. Diesel-generated electricity was substituted, causing electricity prices to increase 500% for 45 days. Electricity demand fell by 25% during the supply disruption. Most of the reduction occurred before the higher rates were implemented. Some conservation – about 8% of historic consumption – persisted after the transmission line was repaired and prices returned to normal. Consumers reduced energy use through a combination of new habits and technical improvements. A survey of residential consumers indicated that the average household undertook 10 conservation actions, with major changes in lighting, space heating, fuel switching, and water and appliance use. We propose a method for prioritizing conservation actions for promotion according to their impact in electricity savings (as a function of popularity, effectiveness, and persistence) and a dynamic framework for electricity use before, during, and after a supply disruption (i.e., both the magnitude and rates of change in electricity conservation).

Research highlights
► An electricity supply disruption caused prices to increase 500% for 45 days.
► Electricity conservation of 25% occurred in a matter of days.
► Electricity conservation of 8% persisted after the supply disruption was repaired.
► Conservation occurred through behavior change and technology adoption.
► The disruption induced consumers to try new behaviors that became new habits.