Introduced by Ofgem, DCP 161 came into force on 1st April 2018 to ensure that any half-hourly (HH) metered sites are billed fairly and correctly in respect of their Agreed Supply Capacity (ASC). Each HH meter across the UK has an ASC, which is measured in kVA and forms part of the site’s Connection Agreement with the local distribution network (DNO). The ASC is charged at a rate which has been agreed within the supply contract and is affected by both voltage level and area. The penalty charge for exceeding your available capacity will increase on average, by an estimated 81%. This charge will vary significantly from region to region.