High levels of demand that occur relatively infrequently (e.g. less than 20% of the hours of the year).
Electricity generation plants that run only at times of peak demand or troughs in supply from other sources.
Plug-in hybrid Electric Vehicle (PHEV)
A vehicle that receives motive power from both a battery and a secondary source (e.g. an internal combustion engine). The battery will generally be charged in the same way as that in a BEV, but all electric range will be more limited (e.g. 40 rather than 100 miles).
Power Purchase Agreement
Agreement to purchase some pre-specified quantity of energy over a specified future time period
Feed additives that reduce the production of methane in ruminants
A technology which stores energy in the form of water, pumped from a lower elevation reservoir to a higher elevation. Lower cost off-peak electric power is generally used to run the pumps. During periods of high electrical demand, the stored water is released through turbines.