Peak Demand

Also referred to as “Peak Load” or “On-Peak”

“The maximum expected load for a given period of time….” usually expressed in a 24 hour period. (AECT) In winter months, peak demand is often in the morning when people are preparing to go to work and school and in the evening when they return home from work and school. In summer months, peak demand is often from mid-afternoon to early evening, when outside temperatures are at their hottest and the air conditioning is always running

Peak demand is typically characterized as annual, daily or seasonal and has the unit of power. Peak demand, peak load or on-peak are terms used in energy demand management describing a period in which electrical power is expected to be provided for a sustained period at a significantly higher than average supply level. Peak demand fluctuations may occur on daily, monthly, seasonal and yearly cycles. (Wikipedia)

Peak Load

Please see “Peak Demand

Peaking Generation

Generation that only operates at times of high demand, and is not needed at times of low demand. (AECT)


This is a semiconductor device that directly converts “solar energy into electricity.” (IEA) It is one of the main processes solar panels use to produce electricity.

The term “photovoltaic” comes from the Greek φῶς (phōs) meaning “light”, and from “volt”, the unit of electromotive force, the volt, which in turn comes from the last name of the Italian physicist Alessandro Volta, inventor of the battery. (From Wikipedia).