Economy 7 with npower

What is Economy 7 and how does it work?

Economy 7 works through a ‘two rate’ meter which gives you lower cost electricity for a 7 hour period during the night. This means that any electricity you use during the 7 hour night period typically costs one third of any electricity you may use during the day.

To benefit, you will need to have an Economy 7 meter fitted.

Economy 7 meters open/close

If you want to have an Economy 7 tariff you will need to have a two rate meter that records what you’ve used for the day and night periods. Unlike a standard tariff meter, a traditional Economy 7 meter usually has two rows of readings, one for the day and one for the night.

If your Economy 7 meter has been installed quite recently, it will probably have an electronic display screen. These meters will usually display the daytime reading - you will need to press a button to display the night reading.

Economy 7 hours open/close

The Economy 7 cheaper rate period will be 7 hours falling somewhere between the hours of 10pm and 8.30am. The time period in which your 7 hours will fall, varies between different areas of the country, the type of meter you have, and may change at different times of the year; for example when the clocks change to British Summer Time (BST) and back in the autumn.

The best way to find out your exact Economy 7 hours is to look at your supply number which you can find on your bill. This is what it will look like.

Economy 7 supply number

By using the above example and using the map below, this customer’s night hours (in the London region) will be 23:00 to 07:00.

For North Scotland, South Wales and the South West, individual meters will have their own settings.  If you are in an area where meters have different settings, the night hours should be shown on or next to your meter. For more information please contact us on 0800 197 4034 (free from most landlines) or 0330 100 8607 (included in any 'inclusive minutes' from mobiles)

Economy 7 map

Is Economy 7 the best solution for me? open/close

To make sure Economy 7 is right for you and your home, take a look at our recommendations below.

  • Have storage heaters to heat your home
  • You use an immersion heater to provide your hot water
  • You set your appliances such as dishwashers, washing machines and tumble dryers to come on overnight, during your cheaper rate period.

Any electricity you use during the day will cost you more than if you chose our standard single rate tariff. If there are people at home during the day and you heat your home and water using electricity, but don’t have storage heaters or a hot water tank, then Economy 7 probably won’t be the most cost effective tariff for you.

How to make the most out of Economy 7 open/close

Take a look at our top tips which could help you to get the most out of Economy 7.

  • Heat water economically overnight by using an immersion heater with a timeswitch controller.
  • Economy 7 works well with storage heaters that are set to come on during the off peak period. This will help to keep heating costs down
  • You will get the most benefit if your home is well insulated
  • Use plug-in or in-built timers with electrical appliances such as washing machines, tumble dryers and dishwashers so that they come on during the 7 hour off peak period, when electricity is cheaper

If you heat your home and water with gas, Economy 7 could still suit your lifestyle, provided you use the bulk of your electricity at night. For example, if you work shift patterns and are up during the night or if you tend to use very little electricity during the day.

How can I calculate how much electricity I use during the night? open/close

You will need to already be on Economy 7 and have either your Annual Statement or bills which will show your previous 12 month electricity consumption. It needs to be a full 12 months because your summer and winter electricity consumption may vary.

Step 1 - Take a look at your annual electricity predicted costs which you can find on your annual statement.

Economy 7 example bill

Step 2 – By using the calculator below, enter your Day 1st Block units in kWh

Step 3 – Enter your Day next units in kWh

Step 4 – Enter your Night units in kWh

Step 5 – Click on ‘Calculate’ and you will now have your % night usage.

% night rate calculation

Night Usage:
Total units: 0

*35% or more: Economy 7 should be saving you money.

*25%-35%: Take a look at our section 'How to make the most out of Economy 7' or you can call one of our energy Advisers who will be able talk to you about what measures you can take to make the most of your Economy 7 hours.

*25% or below: Economy 7 is probably not the right tariff for you. Call us to find out more about our range of tariffs which could be more suitable for you and your lifestyle.

For existing customers:
0800 073 3000 (free from most landlines)
0330 100 3000 (included in any ‘inclusive minutes’ from mobiles).

The higher percentage you have*, the more likely that Economy 7 is benefiting you. However, this is dependant on the product you are on, your payment method and the area in which you live.

If you would like to find out more information about Economy 7 or to speak to one of our advisers about changing your tariff please call us on 0800 197 4034 or 0330 100 8607.

Terms and conditions

Currently an Economy 7 npower customer on our standard product with average consumption of 5,000 units per year would have to use a minimum of 35% of their electricity at off peak times to make it more cost effective than being a standard single rate customer. This figure will necessarily vary according to the customer's actual consumption, payment method and the area in which they live, and may be lower.

Phone calls: Calling us on a 0800 number is normally free when you call from a landline but charges may vary if you use a mobile. Calling us on a 0330 number will cost you no more than 01 or 02 numbers from landlines or mobiles. If you get ‘inclusive minutes' with your package, calls on a 0330 number will be part of these.