What are 'interruptible loads'?

Interruptible loads refer to power consumers that have the capability and willingness to reduce their electricity consumption during times of grid stress or peak demand. These consumers typically include industrial facilities, large commercial users, or even some residential customers who have contracts with utilities that allow for temporary reductions in their power use.

During periods when the electrical grid is under strain—such as during peak use times or due to unexpected generator outages—these consumers can decrease their load as part of demand response programs. This reduction helps maintain grid stability and prevents outages. The ability for these consumers to "interrupt" or decrease their power usage is a critical strategy that utilities employ to manage supply and demand without immediately resorting to more expensive or less environmentally friendly energy sources.

In contrast, the other options describe scenarios that do not accurately capture the concept of interruptible loads. For instance, power consumers that never reduce their electricity use would be in direct opposition to the definition. Generators providing backup power or loads that increase power consumption during peak times do not involve the proactivity needed from participants in interruptible load programs.