FreePhase - save when you use electricity smarter

Our beta smart tariff helps you save money, reduce carbon and unlock free electricity moments

What is FreePhase?

FreePhase is a time-of-use smart electricity tariff.

That means:

Electricity prices change throughout the day, so you pay less when demand is lower
You can save money or even get free electricity by using it during cheaper periods

Instead of one flat rate, FreePhase uses three price bands:

🔴 Red: 4 pm–7 pm (peak) – the most expensive time to use electricity
🟠 Amber: 6 am–4 pm & 7 pm–11 pm (mid) – medium price
🟢 Green: 11 pm–6 am (off-peak) – the cheapest

Choose the FreePhase tariff that suits how you use electricity

FreePhase Dynamic – Prices change daily based on energy demand. You could pay less, but costs can vary. Stay ahead by checking tomorrow’s prices, viewing your red, amber and green rates, and seeing when your free electricity hours are coming up
FreePhase Static – Prices stay the same for 12 months. You get predictability, but with slightly less flexibility

The benefits of our FreePhase tariff

Get free and cheaper electricity

Use electricity for free during special periods, when there's more renewable energy on the grid. Pay less outside peak hours. FreePhase is a fixed-term tariff with no exit fees, so you get cost certainty without being locked in.

Save more by using electricity smarter

Shift your energy use away from peak (red) hours and watch your bills go down. Take control and pay less each month.

Flexible electricity that works for you

With FreePhase, you choose when to use electricity. By shifting usage, you also help reduce pressure on the grid and cut carbon emissions.

What you need to get FreePhase

A working smart meter – or be happy to have one installed
Agree to share half-hourly data – so we can apply your tariff correctly
Pay by monthly Direct Debit – simple, automatic and hassle-free

Check if you’re eligible and read the full T&Cs

Choose the FreePhase tariff that suits your home and lifestyle

FreePhase Dynamic

Ideal if:
You’re happy to check electricity prices regularly and shift usage to cheaper times. Green and Amber periods are usually the lowest, so staying informed helps you save the most.

Perfect for:
Homes with solar panels, air source heat pumps, electric vehicles, or anyone keen to cut their energy bills.

Get my Dynamic quote

FreePhase Static

Ideal if:
You want simple, predictable pricing without tracking daily rate changes. Green and Amber periods are always the cheapest, and your rates stay fixed, so you can plan with confidence.

Perfect for:
Anyone looking for price certainty and a set-and-forget approach to energy.

Get my Static quote

The power to plan ahead

Make it easy to use electricity when it’s cheapest, or even free. FreePhase gives you the tools to stay in control and maximise your savings.

Stay one step ahead

Sign up for FreePhase Dynamic to see tomorrow’s electricity prices so you can shift usage to cheaper or free periods and get the most savings.

Track and understand your energy

Using smart meter data, Energy Hub shows exactly how much you’re using and highlights ways to save more. Available in MyAccount and the EDF app.

Never miss a free period

We’ll send a text alert before a free electricity period starts so you can make the most of it.

Why choose a time of use tariff?

What is a time of use tariff?

A time of use tariff gives you different electricity rates at different times of the day. This means you can pay less for the energy you use during off-peak hours, when demand is lower.

Tariffs like FreePhase and Economy 7 are examples of time of use tariffs.

The benefits include:

Lower costs off-peak – use appliances like washing machines, dishwashers or EV charging during cheaper hours to help lower your bill
Better for the environment – off-peak periods often use more renewable electricity, such as wind and solar, helping reduce reliance on fossil fuels
Supports a more stable grid – spreading energy use across the day helps reduce pressure during busy peak times
Works with your smart meter – half-hourly readings help give you more accurate pricing, better visibility of your usage, and more control over how you manage your energy costs

What’s a smart tariff?

A smart tariff is any tariff that works with a smart meter. Your smart meter automatically sends readings, which lets us offer tariffs with more tailored pricing, such as time of use plans.

FreePhase FAQs

Why is FreePhase a beta tariff?

FreePhase is a new kind of electricity tariff that helps you save money and cut carbon. It gives you more control over the price you pay and helps ease pressure on the national grid during peak times.

Because it’s a beta tariff, we’re testing and refining it to make sure it works smoothly. If we need to make improvements along the way, we’ll do so quickly.

We want you to feel confident in your choice. If FreePhase isn’t right for you, you can switch to another EDF tariff at any time, with no exit fees.

Is my bill accurate?

Yes – your bill reflects the electricity you use and the rates that apply at the time you use it.

Because FreePhase is still a beta tariff, there are a few temporary limitations in how the bill is shown:

Red, Amber, and Green rates aren’t on the bill yet. You can see a daily breakdown in the graph or check your consumption and costs in Energy Hub. For FreePhase Dynamic, we show a weighted average unit rate for now.
Daily unit rate changes don’t appear on the bill, and the estimated annual cost currently only includes the standing charge.

You’ll still see that you’re on one of our cheapest tariffs. If you’re shifting your usage, this should be accurate. For FreePhase Dynamic, we recommend using our quoting tool to check your potential savings.

Why doesn’t my In-Home Display (IHD) show my FreePhase prices?

Right now, IHDs aren’t able to show smart tariff prices like FreePhase Dynamic. These prices update frequently, and the IHD wasn’t designed to handle that level of real-time data. We know this isn’t ideal, and working on improvements.

In the meantime, there are easier ways to track your prices and energy use:

EDF Price Watch page – see today and tomorrow’s prices
EDF Energy Hub – explore your usage and costs.
Third-party apps and tools – our FreePhase community has built great tools to help track prices and usage
For tech enthusiasts – if you love data, you can dive into your usage with our open API

Will I pay any exit fees to leave my current tariff if I want to sign up to FreePhase?

No, you won't pay any exit fees if you leave your current tariff early, when signing up to one of our FreePhase tariffs.

Do I pay any exit fees if I want to leave my FreePhase tariff early?

No, you won't pay any exit fees to leave your FreePhase tariff early. You can change to a different EDF tariff at any time without penalty if you find the FreePhase tariff isn't right for you. But if you do decide to leave your FreePhase tariff for any reason, you may not be able to join another FreePhase tariff for nine months.

Can I take part in the Sunday Saver challenge if I'm on a FreePhase tariff?

No, you can't take part, as you have to be on a one or two-rate tariff to do the Sunday Saver challenge. Our FreePhase tariffs have three electricity rates.

How do I qualify for FreePhase tariffs?

To join FreePhase, you must:

Be an existing EDF customer
Or, join EDF on our Standard Variable tariff
You'll also need a working smart electricity meter that can send us half-hourly reads

How do I switch to a FreePhase tariff?

If you're already an EDF customer, simply get a quote; you'll then be given an estimate which will depend on how much electricity you think you'll use during each of three time periods. You can then choose to join a FreePhase tariff if you're happy with your quote.

If you're not yet an EDF customer, you'll need to join our Standard Variable tariff first. Find out more about how to switch energy suppliers.

What's the difference between EDF's standard tariffs and FreePhase tariffs?

FreePhase is a time-of-use tariff, which means electricity prices change depending on when you use it. You pay less during off-peak periods (Amber and Green times).

In contrast, EDF’s tariffs – like our fixed energy tariff or Standard Variable charge the same rate all day, no matter when you use electricity.

Are time of use, smart, three phase and multi rate tariffs the same?

Time-of-use tariffs are smart tariffs where the price of electricity varies depending on when you use it, rather than staying the same all day.

Smart tariffs use a smart meter to track your usage (usually in half-hourly intervals) and automatically apply the right price.

Multi-rate tariffs also offer different prices at different times, but they can work with smart or traditional meters (like Economy 7). Older meters use separate registers, while smart meters record usage digitally.

Three-phase meters are usually found in older or high-demand properties. These aren’t compatible with FreePhase tariffs.

In short:

Time-of-use and multi-rate tariffs both have variable pricing
Smart tariffs rely on smart meters
Three-phase refers to a type of meter, not a tariff

How do you calculate the red, amber and green rates?

Prices change every day based on wholesale electricity costs for the next day. We use Nord Pool’s day-ahead market prices and apply a formula:

Red:

Price = C × W + P - GD

(Coefficient × Wholesale Price + Peak Premium - Government Discount)

Amber & Green:

Price = C × W - GD

(Coefficient × Wholesale Price - Government Discount)

What do C, W, and P mean?

C (Coefficient): A multiplier that covers extra costs suppliers pay (like network charges). It varies by region
W (Wholesale Price): The average market price for electricity during that time period
P (Premium): An extra amount added only during peak hours (4 pm–7 pm) to cover higher costs at that time. Also varies by region
GD (Government Discount): From 01/04/2026, we will be passing through the Energy Company Obligation (ECO) and the Renewables Obligation (RO) savings. This cost will be discounted from your unit rate

Price cap

No individual unit rate will ever exceed £0.75 per kWh (including VAT), no matter what happens in the market.

What are the current C and P values?

Region	Grid Supply Point	C	P
Eastern	A	2.05	13.16
East Midlands	B	2.05	6.46
London	C	2.15	9.29
Merseyside & North Wales	D	2.17	7.52
Midlands	E	2.03	7.04
Northern	F	2.03	6.08
North Western	G	2.08	11.06
Southern	H	2.08	8.6
South Eastern	J	2.01	15.54
South Wales	K	2.08	8.64
South Western	L	2.01	11.26
Yorkshire	M	2.04	4.35
South of Scotland	N	2.05	7.21
North of Scotland	P	2.2	6.48

Will these values change during my tariff?

Yes. Changes to Coefficient and Premium values will occur automatically every April, but only in a manner fully linked to fluctuations in non-energy and peak-hour costs, which, regrettably, we do not control! Once they have been changed, we will ensure the current applicable C & P values are available here, so you will also have visibility of the latest values.

In short

Your price each day = wholesale electricity cost × a regional multiplier (C), plus a small extra charge (P) during peak hours. This ensures prices reflect real market costs while covering essential supplier expenses.

How do you calculate the FreePhase Dynamic standing charge?

The standing charge may change every January, April, July and October by tracking the EDF Standard Variable Tariff standing charge plus a FreePhase service fee. We will calculate the standing charge every three months using the following formula:

Standing Charge = A + B

A: The EDF Standard Variable tariff standing charge applicable for those months and your region

B: The FreePhase service fee

What are the current A and B values?

A: You can view the rates here

B: The current Freephase service fee for 10 March 2026 to 30 June 2026 is 0p (nil)

Your current standing charge will be set out in your MyAccount.

Will these values change during my tariff?

Yes. Changes to the EDF Standard Variable tariff standing charge and FreePhase service fee will occur automatically every January, April, July and October. Once they have been changed, we will make sure the current applicable values are available here, so you will also have visibility of the latest values.