With a dynamic energy tariff you pay the real market price for electricity. That price follows supply and demand: around midday solar generation pushes the price down (sometimes below zero), while between 5pm and 9pm demand — and price — usually peak. GB's day-ahead auction sets a price for every hour of the day, so Dymergy calculates the best moment on an hourly basis for Great Britain (unlike the 15-minute pricing used on the continent).
This page turns those hourly prices into one answer. We compare what your appliance costs now with the best time for the rest of today and tomorrow (once tomorrow's prices are known, from around 1pm). Amounts are indicative: market price plus levies, average supplier margin and VAT. Your own tariff may differ slightly.
On sunny days around midday, and also overnight. It's almost always most expensive between 5pm and 9pm, when everyone gets home from work. But it varies day to day — which is why this page calculates it live.
No. With a fixed or standard variable tariff, you always pay the same price per kWh, whatever the time. Only a dynamic tariff lets you benefit from the cheapest hours — and more suppliers now offer them.
Yes. With plenty of solar and wind generation and low demand, the market price can fall below zero — you're then effectively paid for your consumption (excluding levies and margin). It happens increasingly often, especially on sunny afternoons.
From the GB day-ahead electricity market via Elexon/BMRS. Dymergy processes these prices live for 8 European markets, including Great Britain.
With a standard tariff you always pay the same price — even during the cheapest times of day. Ask your current supplier, or follow live market prices on Dymergy.
See live pricesThe same YES/WAIT/NO signal is available as a live MQTT data feed for BMS, controllers and installations — for 8 European markets.
Discover the Dymergy data feed