Economy 7

Economy 7

Economy 7 is the name of a tariff provided by United Kingdom electricity suppliers that uses base load generation to provide cheap night-time electricity.

Houses using the Economy 7 tariff require a special electricity meter which provides two different readings - one for the day period and one for the night period. The night (off-peak) period lasts for seven hours, hence the name.

set to start using a timing device.

The specific times when Economy 7 applies vary between different regions and at different times of year. Usually the seven-hour period starts at 1:30am during summer and 12:30am in winter. Some regions use radio teleswitching to control consumers' systems and vary the timing — this uses data carried on the 198 kHz BBC Radio 4 LW signal.

As an example of price tariffs during 2006, Ecotricity charged 22.03 UK pence per kilowatt hour (kWh) for the first 728 kWh's of day usage (per annum) and 12.13 UK pence per subsequent kWh and 4.63 UK pence per off-peak kWh. Whilst Npower charged 17.25 UK pence per kilowatt hour for the first 705 kWh's of day usage, 10.89 UK pence per subsequent unit use and 3.95 UK pence per off-peak kWh. Consequently a house requires at least 20% of its consumption during the off-peak period to save money.

ee also

*Economy 10
*Energy use and conservation in the United Kingdom
*npower
*PowerGen

External links

* [http://www.uswitch.com/energy/economy7.html Economy 7 at uSwitch.com]
* [http://www.nie.co.uk/nieenergy/homeenergy/advice/publications/Downloads/QSG_Economy_7.pdf A Brief Explanation From Northern Ireland Electricity] (PDF file)
* [http://www.knh.org.uk/knh/knhdocs/Doc.aspx?ref=wmao2n A guide to getting the most out of Economy 7 storage heaters] (PDF file)


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