Free electricity is not a phrase UK energy suppliers throw around lightly. EDF FreePhase Dynamic - the headline EDF smart tariff 2026 and the only three band electricity tariff on the UK retail market - does. The tariff flagged around 192 hours of free power for customers over the last year, every time the wholesale market went negative because of surplus wind and solar. EDF texts the day before each free window so households can move washing, dishwashing, EV charging or hot-water heating into the cheap overnight electricity UK households would otherwise pay full peak rates for.
The free hours sit on top of a three-band price structure: 11.5p per kWh overnight, around 19p in the day, and a higher peak rate from 4pm to 7pm. The night rate alone runs about 44% under the Q3 2026 standard variable tariff (which climbs to 26.11p per kWh from 1 July), and the tariff is capped at 75p/kWh for the first 12 months. The right household pockets around £186 a year on passive use, closer to £250 with light load shifting - before a single free-hour credit lands.
What is the EDF FreePhase Dynamic tariff?
EDF FreePhase Dynamic is the EDF time of use tariff for 2026, charging three different unit rates at fixed times of day. Overnight demand falls while wind generation often keeps running, so wholesale prices drop and EDF passes that through as a cheap Green rate. The late-afternoon peak tightens the grid and becomes the Red rate.
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The EDF FreePhase green band covers seven hours overnight at 11.5p per kWh, Amber covers the 14 standard-rate hours either side of peak, and Red is the three-hour 4pm-7pm crunch. On top of the bands, FreePhase Dynamic drops to 0p per kWh for short flagged windows whenever the wholesale market goes negative - typically high-wind, low-demand periods, with a day's text notice so loads can be moved in.
Switch to FreePhase Dynamic and start collecting free electricity hours
EDF is the UK's biggest generator of zero-carbon electricity and one of Britain's largest suppliers. FreePhase Dynamic carries no exit fees and a 75p/kWh price cap for 12 months - so the upside is free hours and a cheap overnight rate, with limited downside if it does not suit your pattern.
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How the EDF FreePhase free electricity hours work
Free electricity hours trigger when wholesale electricity prices on the day-ahead market go below zero - usually overnight or on weekends with high wind output and low demand. Across 2024, EDF counted around 192 hours of equivalent free power available on this basis. That is the headline sales pitch for FreePhase Dynamic and the single biggest reason to switch.
EDF sends a text the day before each free window opens, so households can stack washing, dishwashing, immersion heating, EV charging or anything else that bends to a schedule into the free period. Customers who never check the messages still benefit from the cheap 11.5p Green band overnight - the free hours simply layer on top.
EDF FreePhase Dynamic eligibility
The tariff requires a second-generation smart meter (SMETS2) because billing depends on half-hourly consumption data. An older SMETS1 meter or no smart meter rules you out until one is installed, and EDF arranges installation as part of the switch at no extra cost. Postcode coverage is not yet universal, so the EDF FreePhase signup page checks your area before you commit.
Already an EDF customer? With a SMETS2 meter and a standard EDF tariff, you can often move to FreePhase Dynamic from inside your EDF online account without a full supplier switch.
FreePhase Dynamic vs FreePhase Static
EDF offers FreePhase in two flavours. Dynamic tracks daily wholesale prices - which is what unlocks the ~192 free electricity hours and lower headline rates - with a 75p/kWh maximum-price guarantee as a floor. Static locks the same three-band structure for 12 months at sign-up: predictable rates, no wholesale risk, no free hours.
| Feature | FreePhase Dynamic | FreePhase Static |
|---|---|---|
| ~192 free electricity hours/yr | Yes | No |
| Three-band rates | Variable daily | Fixed 12 months |
| Cheap when wholesale dips | Yes | No |
| Wholesale risk | Yes (capped 75p/kWh) | None |
| Best for | EVs, engaged households | Set-and-forget |
For most households reading this review, Dynamic is the stronger pick - free hours plus wholesale upside outweigh the variability, with the 75p cap as a safety floor. Static suits households who want full price certainty over headline savings.
EDF FreePhase savings: a worked example
For a household using 2,700 kWh a year (Ofgem's Typical Domestic Consumption Value), the EDF FreePhase savings depend on how usage spreads across the three bands. In the passive case - usage roughly 29% Green, 58% Amber, 13% Red - the annual bill on FreePhase Dynamic lands around £519, against £705 on the Q3 2026 SVT at 26.11p. That is a £186 saving with no behaviour change, before any free-hour credits.
Annual electricity cost: 2,700 kWh at Q3 2026 rates
Most households overlook the fixed comparison. A typical 24p one-year fix costs £648 vs FreePhase Dynamic's £519. Even the best fix at ~22p (£594) sits ~£75 higher on passive use, and active shifting to the Green band stretches the gap to ~£139 a year. Loads easiest to move: dishwashers and washing machines on delay timers, immersion heaters, EV charging.
EDF FreePhase Dynamic vs a fixed tariff
Fixed tariffs appeal because they are simple, but every unit at a typical 24p mid-market fix costs more than FreePhase Dynamic's Amber rate, let alone the Green.
| Factor | EDF FreePhase Dynamic | Fixed tariff (~22-24p) |
|---|---|---|
| Annual cost: passive use | £519 | £594-£648 |
| Annual cost: active shifting | ~£455 | Not possible |
| Saving vs best fix | £75-£139 | Baseline |
| Exit fees | None | Often £50-£100 |
| Smart meter required | Yes (SMETS2) | No |
| Behaviour change | Shift loads overnight | None |
EDF FreePhase Dynamic vs Octopus Agile
EDF FreePhase vs Octopus Agile is the other comparison that matters. Agile prices change every 30 minutes off the wholesale market, with overnight rates often below 10p, so households willing to automate around half-hourly prices can land a lower annual bill on Agile. FreePhase Dynamic is the simpler choice, with a fixed 11.5p per kWh tariff overnight, free hours flagged by text, and no automation needed. Our cheapest time of day to use electricity guide compares the major UK time-of-use tariffs side by side.
EDF FreePhase Dynamic pros and cons: who should switch
The tariff works best when a meaningful share of consumption moves to the 11pm-6am Green window. For EV drivers that share is large by default, which is why EDF FreePhase is widely treated as the best EV tariff UK 2026 has on offer for households that do not want to automate around half-hourly prices.
EV owners charging overnight. Dishwashers and washing machines on delay timers. Immersion heaters on a timer. High overnight base load: server, aquarium, dehumidifier, electric storage heating.
Cooking, showering and heating that routinely runs 4pm-7pm. Young families with early-evening peaks. Anyone unable to shift at least a quarter of usage out of the Red band - a fixed deal will suit better.
The Red band is the risk - at 35p per kWh it sits above the 26.11p SVT rate. Open your smart meter app and check 4pm-7pm use for a typical weekday; if that window is low or shiftable, FreePhase Dynamic saves you money.
The SwitchInsights take
For households with any flexibility - an EV, an immersion heater, delay-timer appliances - EDF FreePhase Dynamic is the standout mainstream EDF smart tariff for 2026. The ~192 free electricity hours a year are unique to FreePhase, the Green band is fixed at 11.5p (not floating like Agile), and the 75p/kWh maximum-price guarantee removes downside risk. Compare live rates in the SwitchPilot tariff tracker before you commit, then start your switch above.
EDF FreePhase Dynamic FAQ
What is the EDF FreePhase Dynamic tariff?
A time of use tariff UK 2026 from EDF with three rate bands - 11.5p overnight (11pm-6am), around 19p standard daytime and evening (6am-4pm and 7pm-11pm), and around 35p at peak (4pm-7pm) - plus around 192 free electricity hours a year flagged by text when wholesale prices go negative.
How much are the EDF FreePhase savings vs the price cap?
Around £186 a year for a typical 2,700 kWh household on passive use against the Q3 2026 SVT. Active shifting of appliances and EV charging to the overnight Green band lifts that to roughly £250. Heavy 4-7pm usage saves less.
How do the EDF FreePhase free electricity hours work?
EDF flags around 192 hours a year - typically when wholesale prices go negative because of surplus wind or solar - and sends a text the day before each free window. Run washing, dishwashing, EV charging or hot-water heating in those windows for zero unit cost on top of the cheap overnight Green band.
Is EDF FreePhase Dynamic cheaper than Octopus Agile?
It depends on usage and engagement. EDF FreePhase Dynamic gives a fixed 11.5p overnight rate with no automation needed, whereas Octopus Agile is variable and can drop lower but demands more active management.
Are there exit fees on EDF FreePhase Dynamic?
No - FreePhase Dynamic is exit-fee-free, so you can leave for another EDF tariff or supplier without penalty.
Is EDF FreePhase the best EV tariff UK 2026 has?
For EV drivers charging overnight without wanting to automate around half-hourly prices, yes - the flat 11.5p Green band beats any fixed deal. EV drivers willing to automate may prefer Octopus Intelligent Go.
How to switch to EDF FreePhase Dynamic
Start on the EDF FreePhase signup page. Enter postcode and current supplier, confirm a SMETS2 meter, and EDF handles the rest in around 5 working days.