EDF FreePhase tariff rates 2026: confirmed rates for every UK DNO region
EDF FreePhase divides the day into green (cheapest, 23:00–06:00), amber (standard level), and red (mild uplift, 16:00–19:00) bands. The exact pence-per-kWh figures vary by DNO region. This page shows the current confirmed rates for every UK region, sourced directly from the tariff database.
Overview
EDF FreePhase (currently Freephase Static 12m v3, updated May 2026) divides the day into three colour-coded rate bands. There is no fixed cheap window during the day — all the discount is concentrated in the overnight green period. The amber rate during the day is at the standard cap level, meaning you're neither penalised nor rewarded for daytime use.
Rate structure:
- Green (cheapest): 23:00–06:00 — approximately 30–35% below the standard day rate
- Amber (standard): 06:00–16:00 and 19:00–23:00 — at the standard cap level
- Red (mild uplift): 16:00–19:00 — modest premium above the standard rate
Current EDF FreePhase rates by DNO region (May 2026)
The rates below are the confirmed current figures pulled directly from the tariff database. EDF FreePhase has regionally differentiated rates across all 14 UK DNO regions.
| Region | Standing charge | Green (23:00–06:00) | Amber (standard) | Red (16:00–19:00) |
|---|---|---|---|---|
| Eastern England | 53.95p/day | 15.72p/kWh | 22.59p/kWh | 42.99p/kWh |
| East Midlands | 53.61p/day | 15.39p/kWh | 21.53p/kWh | 39.75p/kWh |
| London | 44.83p/day | 15.28p/kWh | 22.13p/kWh | 40.66p/kWh |
| Merseyside & N Wales | 70.78p/day | 16.11p/kWh | 23.73p/kWh | 45.11p/kWh |
| Midlands | 59.72p/day | 15.64p/kWh | 21.60p/kWh | 40.19p/kWh |
| North East | 64.30p/day | 15.37p/kWh | 21.80p/kWh | 39.77p/kWh |
| North West | 47.63p/day | 15.49p/kWh | 22.28p/kWh | 43.85p/kWh |
| Northern Scotland | 49.70p/day | 15.58p/kWh | 22.40p/kWh | 42.45p/kWh |
| South East | 54.45p/day | 15.66p/kWh | 21.96p/kWh | 46.77p/kWh |
| South West | 57.86p/day | 15.77p/kWh | 21.89p/kWh | 44.47p/kWh |
| South Wales | 57.90p/day | 15.58p/kWh | 21.88p/kWh | 46.43p/kWh |
| Southern England | 64.39p/day | 15.68p/kWh | 22.10p/kWh | 38.41p/kWh |
| Yorkshire | 64.20p/day | 15.45p/kWh | 22.03p/kWh | 42.09p/kWh |
| Southern Scotland | 57.57p/day | 15.69p/kWh | 23.01p/kWh | 39.36p/kWh |
How the rate structure works
Green window (23:00–06:00): Seven hours of cheap overnight electricity. For a heat pump household, this is the primary window for hot water cylinder reheating and overnight space heating preheat. A 200-litre cylinder takes approximately 75–90 minutes to reheat — well within the seven-hour window.
Amber rate (standard level): During the 17 hours outside the green and red windows, you pay approximately the Ofgem standard cap rate. Unlike Economy 7, this is not inflated — you're simply not getting a discount. Heat pump use during amber hours doesn't hurt you, it just doesn't earn you anything.
Red rate (16:00–19:00): The mild peak rate is typically 30–40p/kWh depending on your region — noticeably above the amber rate but significantly lower than Cosy Octopus's peak of 52.88p/kWh. Running a heat pump during red hours is suboptimal but not catastrophic.
How FreePhase compares to other heat pump tariffs
| Tariff | Cheap hours/day | Cheapest rate (Eastern England) | Peak rate |
|---|---|---|---|
| EDF FreePhase | 7 (overnight) | 15.72p/kWh | 42.99p/kWh (mild) |
| Cosy Octopus | 8 (3 windows) | 14.93p/kWh | 52.88p/kWh (steep) |
| British Gas Heat Power | 10 (overnight + midday) | ~16.28p/kWh | None (standard rate) |
| E.ON Next Pumped | 21 (super off-peak + off-peak) | ~8.00p/kWh | ~33.34p/kWh |
FreePhase has fewer cheap hours than British Gas Heat Power and a higher cheapest rate than E.ON Next Pumped. Its advantage is simplicity — one overnight window, a mild peak that's manageable if unavoidable, and no exit fees.
Is EDF FreePhase right for your home?
FreePhase suits households where most heat pump run-time can be concentrated overnight and in the early morning, and where the absence of a midday cheap window isn't a significant loss. It's a lower-risk alternative to Cosy Octopus for households that can't reliably avoid a steep peak rate.
Compare EDF FreePhase against every other heat pump tariff using your actual half-hourly smart meter data on Heat Pump Tariffs.
All rate data sourced directly from the Heat Pump Tariffs database, updated from the EDF Kraken API. Rates shown are effective from May 2026.