For heat pump and EV homes

Find the cheapest electricity tariff for how you actually use it

We price every major UK tariff (Standard, Economy 7, Time of Use and dynamic) against your own half-hourly smart meter readings, so you see what you would really have paid.

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What a comparison shows you

Example
Your tariff Flexible Octopus £1,240 a year
Best for you Best Cosy Octopus £1,026 a year
Save about £214 a year by switching

Example figures. Your own comparison uses your real readings and the rates for your region.

  • Independent: no paid rankings
  • Free, no card needed
  • Read-only smart meter link
  • All 14 UK regions
Tariffs from and 1 more

How it works

Four steps, about ten minutes, nothing to install.

  1. Create a free account

    Choose your region once, so you only see tariffs you can get.

  2. Connect your smart meter

    Link the free Bright app and your half-hourly readings arrive every day. No new hardware.

    Or upload a CSV

  3. Compare

    See what every tariff would have cost you, cheapest first.

  4. Switch, or stay put

    Move to the best deal with confidence, or know you are already on it.

See how we work out the costs

Connecting your smart meter is free

Skip the CSV export entirely. Link your existing UK smart meter via the free Bright app from Hildebrand (built on the Glowmarkt platform) and we'll pull your half-hourly usage automatically. No new hardware, no manual exports, no spreadsheets - and it's especially useful for heat pump and EV households where getting the tariff choice right matters most.

  • Works with SMETS1 and SMETS2 smart meters across all 14 UK DNO regions
  • Reads electricity (and gas too, if you want the context)
  • Updates daily once linked, so your comparison stays fresh
  • Read-only access: we never send anything back to your meter

Compared to uploading a CSV every few months, an active Bright link keeps your tariff comparison accurate as suppliers change rates and your usage shifts season to season.

Create a free account

How the smart meter link works

  1. Download the free Bright app (iOS / Android) or visit Glowmarkt on the web and sign up with your smart meter MAC address.
  2. Allow up to 24 hours for Glowmarkt to start pulling half-hourly data from your meter.
  3. Register here, then sign in to Bright on our Connect Bright page. It takes about a minute.
  4. Your comparison starts running automatically against every Standard, Economy 7, Time of Use and dynamic tariff we track.

Tariff types we compare

Standard

A single unit rate for all electricity used, 24 hours a day.

Economy 7

Separate day and night rates with a customisable night window.

Time of Use

Multiple rate bands through the day: peak, off-peak and more.

Dynamic

Half-hourly rates that change with the grid, like Octopus Agile. Can go negative.

Tariffs we compare

We track live rates across 8 suppliers and 277 tariffs across all 14 UK DNO regions.

100Green

1 tariff tracked across all UK regions

Time of Use

British Gas

4 tariffs tracked across all UK regions

Time of Use

EDF

52 tariffs tracked across all UK regions

Standard Time of Use Dynamic

Eon Next

112 tariffs tracked across all UK regions

Standard Time of Use

Good Energy

5 tariffs tracked across all UK regions

Time of Use

Octopus

99 tariffs tracked across all UK regions

Standard Economy 7 Time of Use Dynamic

Price Cap

1 tariff tracked across all UK regions

Standard

ScottishPower

3 tariffs tracked across all UK regions

Time of Use

View all tariffs

Octopus Energy, EDF and E.ON Next rates are fetched from their price lists every day; other suppliers’ rates are checked by hand.

Tariffs by region

Standing charges and rates vary between the 14 UK DNO regions. Pick yours to see the best heat pump and EV tariffs available there.

East Midlands
National Grid Electricity Distribution
Eastern England
UK Power Networks
London
UK Power Networks
North East England
Northern Powergrid
North Wales, Merseyside and Cheshire
SP Energy Networks
North West England
Electricity North West
Northern Scotland
Scottish and Southern Electricity Networks
South East England
UK Power Networks
South Wales
National Grid Electricity Distribution
South West England
National Grid Electricity Distribution
Southern England
Scottish and Southern Electricity Networks
Southern Scotland
SP Energy Networks
West Midlands
National Grid Electricity Distribution
Yorkshire
Northern Powergrid

View all regions

Especially useful for heat pump & EV households

Heat pumps and electric vehicles can add 5,000–15,000 kWh a year to your electricity use, far above Ofgem's typical household figure of 2,500 kWh. At that level of use, even a small difference in unit rate makes a very significant difference to your annual bill.

Many households with heat pumps benefit from smart tariffs like Octopus Agile (dynamic half-hourly pricing) or Time of Use tariffs, where cheap overnight rates can be exploited by scheduling your heat pump or EV charging to run during off-peak periods. But whether that's actually true for your home depends on your specific usage pattern, which is exactly what this tool analyses.

Upload your smart meter data and we'll calculate your exact cost on every available tariff based on when you actually use electricity, not a generic estimate.

Why tariff choice matters more at higher consumption

Household type Typical annual kWh
Typical UK household (Ofgem) ~2,500 kWh
EV owner (avg mileage) ~4,500–5,500 kWh
Heat pump (3-bed home) ~8,000–12,000 kWh
Heat pump + EV ~13,000–18,000 kWh

A 1p/kWh saving on a 15,000 kWh household is worth £150/year. The right tariff choice can save considerably more.

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Independent: suppliers don't pay to be listed or ranked. Where our data comes from