Tariffs, changing tariff and swapping your meter when you have a complex meter (e.g. Economy 10, Eco2020, Heatwise)

Here is a quick guide to understanding complex meters and the main types available. Learn more about your meter, rates, and off-peak hours.

Looking for information about Economy 7 meter?
Although you pay two electricity rates for your Economy 7 meter, it isn't classed as a 'complex meter'. Find out more about Economy 7 meters

Economy 10

With Economy 10, you get ten hours of electricity at a lower rate.

Number of electricity rates: two

Off-peak hours: times are set by your local network operator and can be found on the last page of your bill. Here's an example of how it might break down:

• Up to four hours in the afternoon
• Up to two hours in the evening
• Up to seven hours at night

Number of MPANs: one or two

What is an MPAN, and where can you find it

Economy 9

With Economy 9, you get nine hours of cheaper electricity grouped throughout the day and night. It's specifically for heating and hot water, so all other electricity use (for washing machines, hairdryers and so on) is charged at the relevant day or night rate.

Number of electricity rates: two

Off-peak hours:

• Heating and hot water: nine hours during the day (split across various times of the day)
• Rest of the home: Power between 6.30 am-11.30 pm on peak; off-peak the remainder of time

Number of MPANs: two

Heatwise

This meter is available in the East Midlands distribution area and is only for heating and hot water. This means you must have your heating and hot water on a separate circuit from the rest of your home's electricity supply.

Number of electricity rates: can have up to five (three for rates for heating and either Economy 7 or Standard (Variable) tariff alongside this

Off-peak hours:

• Three hours in the afternoon
• Two hours in the evening
• Five hours at night

Warmwise

With Warmise, you get eight hours of cheaper electricity, specifically for heating and hot water at various times of the day. This means you must have your heating and hot water on a separate circuit from the rest of your home electricity supply. All other electricity use (for washing machines, hairdryers, and so on) is charged at the relevant day or night rate.

Number of electricity rates: four (three for power and one for heating)

Off-peak hours: Eight hours (at least two hours between 1-5 pm)

Eco2020

Number of electricity rates: two

Off-peak hours:

• Monday to Friday – 9 pm and 7 am
• Saturday and Sunday – all day and night

Other complex meters

Off-peak (type '1', '2' or 'U'): These meters are found in the South East, South West and London distribution areas only. Off-peak meters offer cheaper electricity chunked together during the day or night.

Cyclocontrol: This system is only found in blocks of flats or maisonettes in London. Your local network distributor controls your heating and hot water times and spreads electricity demand evenly throughout the day.

If you have a complex meter and want to change it to a different meter type, it's best to get in touch with us to see what we can do.