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Economy 7 is 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 ...
The typical use of a teleswitch is to manage the start and end times of off-peak charging periods associated with tariffs such as Economy 7 and Economy 10.This includes switching between 'peak' and 'off-peak' meter registers as well as controlling the supply to dedicated off-peak loads such as night storage heating.
The equivalent Economy 7 costs are 21.34p per kWh during the peak usage period with 7.83p per kWh during the off-peak usage period, and a standing charge of 18.90p per day. [28] Timer switches installed on washing machines , tumble dryers , dishwashers and immersion heaters may be set so that they only switch on during the off-peak usage period.
Economy 10 thus requires a special multi-tariff meter, different from an Economy 7 meter. For example, customers in central Scotland (within the Scottish Power Energy Networks DNO area) are on the following times: 3 hours in the afternoon (1.30pm - 4.30pm) 4 hours in the evening (8.30pm - 12.30am) 3 hours in early morning (4.30am - 7.30am)
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For instance, a small car might need only 10–15 horsepower (7.5–11.2 kW) to cruise at 60 mph (97 km/h). It is likely to be geared for 2500 rpm or so at that speed, yet for maximum efficiency the engine should be running at about 1500 rpm (gasoline) or 1200 rpm (diesel) to generate that power as efficiently as possible for that engine ...
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