Even for businesses the focus is usually on cutting demand at times of high prices, not the converse. The contract looks something like "You pay 10% less per k

Even for businesses the focus is usually on cutting demand at times of high prices, not the converse. The contract looks something like "You pay 10% less per kWh, but in return we get to turn off the power to this part of your warehouse for up to one hour per day". It works for places that have, say, big industrial freezers - set the thermostat half a degree lower and the outages aren't a problem.