STOR or the Short-Term Operating Reserve is one of the UK’s longest standing balancing programmes.
The programme is widely adopted by UK businesses and targets key times throughout the day when the country’s demand is at its highest and/or due to generation plant unavailability.
The window for the programme varies over the six STOR seasons, but is typically between 7.00am and 2.00pm and 4.00pm and 10.00pm.
Businesses taking part in the STOR programme are paid an availability payment to be on standby during these times and commit to making a reduction in site demand through reducing load or ramping up generation. They also receive an additional utilisation payment when called to respond.
Businesses are usually given twenty minutes of notice that an event is going to be called and respond with their agreed reduction strategy. There are three routes into the STOR programme.