On this page you will find a range of key terms explained. Please click on a letter below to be taken to a list of terms and on "show" to read the explanation.
Terms for letter 'Z'
A tariff in respect of an evergreen contract which is no longer capable of being entered into by all domestic customers.
A contract where a customer takes a supply of electricity, gas or both in a manner otherwise than under a contract that has been expressly entered into with a supplier.
The UK government department responsible for policy in the fields of energy and climate change.
An exemption from or relaxation of a rule (which may include the imposition of alternative rules).
A determination is a binding decision by us, including our reasons, in relation to a dispute referred to us under the Acts or the relevant licence provisions.
The circumstances in which a dispute between a licensed energy network company and a customer may be referred to the Gas and Electricity Markets Authority (“the Authority”) for determination are set out in: Ofgem guidance on determination of disputes [pdf].
Individual determinations are published on our Electronic Public Register.
A method of payment where a fixed or variable amount is taken from a bank account each month, quarter or year.
Any form of payment, saving, rebate benefit or reward that is in any way linked to a Domestic Energy Supply Product. One example is the dual fuel discount.
A customer that uses energy for non - commercial purposes.
Companies who sell energy to and bill domestic customers in Great Britain.
A type of energy contract where a customer takes gas and electricity from the same supplier (or two affiliated suppliers).