Load shifting refers to moving an electricity load from one period of time to another. It differs from other strategies such as energy efficiency because the total amount of energy being consumed doesn’t change. Load shifting is generally done to:
1.- Move energy consumption from a high cost tariff period to a low one (such as moving from peak to off-peak)
2.- Reduce consumption in a period of network peak demand (expensive energy) by spreading out the consumption over a longer period
At its simplest, load shifting is using the timer on your appliances (for e.g. dishwashers and washing machines) to run during low cost tariff periods in the early morning, or changing your work schedule. At the more complex end, it includes having Demand Response Enabling Devices (DREDs) installed on equipment such as air-conditioning, refrigeration systems, pumps and PV systems. This allows the equipment to be turned off (with your permission) for short periods of time by an energy supplier. A good time to consider this is when this type of equipment is being upgraded. For load shifting to be of benefi t, you need to have tariffs which reward reductions at certain time of day - load shifting will have no effect if you are on a fl at rate. Also, load shifting will not be practical if you do not have substantial electricity loads that can be shifted, or if those electricity loads already operate at off-peak times.