World Library  
Flag as Inappropriate
Email this Article

Economy 7

Article Id: WHEBN0002974608
Reproduction Date:

Title: Economy 7  
Author: World Heritage Encyclopedia
Language: English
Subject: Radio teleswitch, Economy 10, Storage heater, Energy in the United Kingdom, Open-pit coal mining in the United Kingdom
Collection: Electric Power in the United Kingdom
Publisher: World Heritage Encyclopedia
Publication
Date:
 

Economy 7

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

Houses using the Economy 7 tariff require a special electricity meter which provides two different readings - one for electricity used during the day, priced higher, and the other for the night, priced lower. The night (off-peak) period lasts for a total of seven hours, hence the name; however it may or may not be a continuous period, as it may alternate between the two prices during the night.

The first mention of Economy 7 is in 1978:[1] "A new off-peak tariff known as the 'Economy 7' tariff was introduced in October [1978]. It featured a seven-hour night rate some 20 per cent cheaper than most night-time tariffs, made possible by economies in the night-time operation of the system." In more recent years the difference between day and night rates has become much larger, with typically over 50% reduction [2] (though dependent on the supplier). Choice of the Economy 7 tariff results in either or both of an increased standing (fixed) charge or increased daytime rate. (Also known as "White Meter", mainly in Scotland, with appropriately white-cased meters.)

Contents

  • Timing and switchover 1
  • Pricing 2
  • See also 3
  • References 4
  • External links 5

Timing and switchover

Economy 7 Meter and Teleswitcher

The night storage heaters and hot water boilers are generally on a separate circuit which is only switched on when the night rate is activated, although any electrical appliance on an ordinary circuit during this period also runs at the lower rate of billing, such as a dishwasher or washing machine set to start using a timing device. Some such machines have timers built-in partly for this purpose, for example Bosch dishwashers.[3]

In newer houses, a digital meter automatically switches to record both ranges. The wiring in the house is rarely different for Economy 7. Many consumers will however choose to set devices such as storage heaters and water heaters to turn on during the hours of Economy 7 to save money. Few houses now have devices controlled solely by the timer on the electricity meter itself.

The specific times when Economy 7 applies vary between different regions and at different times of year. Typically the seven-hour period starts at 1.30am during British Summer Time and 12:30am during Greenwich Mean Time (winter).[4] Some regions use radio teleswitching to control consumers' systems and vary the timing. This uses data superimposed on the 198 kHz BBC Radio 4 long-wave signal.

Pricing

Electricity supply in the United Kingdom is deregulated and the several providers offer different tariffs, much as telephone or internet service providers do. Economy 7 can offer some consumers savings, but a careful analysis should be done. For example, if the price is double the normal tariff during the 'day' period, and half the normal during the 'night' period, then to break even the consumer would need to use over 2/3 of their energy during the 'night' period. (Typically this makes sense when heating/water is electric rather than gas, or if a resident of the home owns an electric vehicle.) An Economy 7 tariff can end up costing significantly more than a standard tariff without restructuring current energy usage.[5]

See also

References

  1. ^ ["http://www.etk.ee.kth.se/personal/nt/elecpow/history/" Electricity Supply in the UK: A chronology], "Electricity Council, UK", "1987" 
  2. ^ ["http://www.energychoices.co.uk/partner-lp_economy-7/economy-7.html#3" "http://www.energychoices.co.uk/partner-lp_economy-7/economy-7.html#3"] 
  3. ^ Dishwashers / Free Standing / Bosch Logixx,   "Time delay (1 – 24 hours) - set your dishwasher to clean overnight and use lower energy costs"
  4. ^ https://customerservices.npower.com/app/answers/detail/a_id/179/~/what-are-the-economy-7-peak-and-off-peak-periods%3F
  5. ^ http://www.energychoices.co.uk/economy-7.html

External links

  • Economy 7 at uSwitch.com (price comparison site)
  • A Brief Explanation From Northern Ireland Electricity (PDF)
  • A guide to getting the most out of Economy 7 storage heaters (PDF)
This article was sourced from Creative Commons Attribution-ShareAlike License; additional terms may apply. World Heritage Encyclopedia content is assembled from numerous content providers, Open Access Publishing, and in compliance with The Fair Access to Science and Technology Research Act (FASTR), Wikimedia Foundation, Inc., Public Library of Science, The Encyclopedia of Life, Open Book Publishers (OBP), PubMed, U.S. National Library of Medicine, National Center for Biotechnology Information, U.S. National Library of Medicine, National Institutes of Health (NIH), U.S. Department of Health & Human Services, and USA.gov, which sources content from all federal, state, local, tribal, and territorial government publication portals (.gov, .mil, .edu). Funding for USA.gov and content contributors is made possible from the U.S. Congress, E-Government Act of 2002.
 
Crowd sourced content that is contributed to World Heritage Encyclopedia is peer reviewed and edited by our editorial staff to ensure quality scholarly research articles.
 
By using this site, you agree to the Terms of Use and Privacy Policy. World Heritage Encyclopedia™ is a registered trademark of the World Public Library Association, a non-profit organization.
 


Copyright © World Library Foundation. All rights reserved. eBooks from Project Gutenberg are sponsored by the World Library Foundation,
a 501c(4) Member's Support Non-Profit Organization, and is NOT affiliated with any governmental agency or department.