Right now
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Generation mix
—Share of GB generation this half-hour, including rooftop solar and small wind farms (NESO estimate).
Agile price now
—Home-grown vs net imports
—Share of all electricity supplied this half-hour.
Clean vs fossil
—Renewables are wind, solar, hydro and biomass.
Inside the renewables
—Each source's share of renewable output right now.
Transmission output
Metered output from large power stations and interconnectors, updated every five minutes by Elexon.
By fuel
—Solar is NESO's estimate for all GB solar panels, which this meter can't see directly. It is published about two hours behind.
Interconnectors
—Flows on each cable to and from Europe and Ireland, in MW.
Batteries
Grid batteries charging and supplying power, from the plans they send to the grid operator.
Grid batteries, last 24 hours
—Planned output of battery units registered with the grid operator.
Battery figures
—Totals cover the selected period.
Wind and solar outlook
Forecasts from Elexon and NESO for the next few days, with the last two days for comparison.
Wind and solar, past and forecast
—Solid is measured, faded is forecast.
Outlook figures
—Average wind (blue) and solar (yellow) output for each day ahead.
Where it came from
Generation share, last 24 hours
—Half-hourly generation shares from NESO, including embedded solar and wind.
Period summary
—Average share over the selected period.
Generation, the last 12 months vs the 12 months before
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Swipe the table sideways for average output in GW →
Compared with the same days 52 weeks earlier, so weekdays line up.
Demand
National demand, last 7 days and next 2 days
—Half-hourly demand on the national grid from Elexon, with NESO's day-ahead forecast dashed. Rooftop solar and small wind farms lower this figure, which is why midday dips on sunny days.
Demand figures
—Prices
Octopus Agile and Tracker, London region. Change region at the top of the page.
Agile half-hourly rates
—Tomorrow's rates appear after Octopus publishes them, usually around 4pm.
Best time to plug in
Finds the lowest average Agile price for this run time from the published half-hours ahead. Good for washing machines, dishwashers and EV charging.
Octopus Tracker daily electricity prices
—Loading published daily electricity prices.
Wholesale price, last 7 days
Market Index Price from Elexon, in £ per MWh (divide by 10 for pence per kWh). Agile tracks this day-ahead price, plus a peak-time charge between 4pm and 7pm.
Installed capacity
What the UK has built, from government statistics. These figures change slowly, a few times a year.
Total generating capacity over time
DESNZTotal UK capacity from UK Energy in Brief 2026, split into renewable and everything else. DESNZ publishes these years only, so growth across a gap (for example 2010 to 2020) is shown as the average per year.
UK generating capacity, 2025
DESNZGas, nuclear, solar, pumped storage and totals from UK Energy in Brief 2026. Wind split from DESNZ figures via Wikipedia. "Bio, hydro, other renewables" and "Other" are the remainders of those totals.
Flexibility
2025–26Interconnector capacity by country, MW, from operator ratings.
Wind capacity, 2010–2025
GWOffshore overtook onshore in 2025 for the first time. The dotted line shows growth on the year before (right-hand scale).
Solar capacity, 2010–2025
GW2025 was a record year, led by rooftop systems on homes. The dotted line shows growth on the year before (right-hand scale).
Battery storage capacity
GBOperational grid-scale batteries in Great Britain. The dotted line is growth on the year before (right-hand scale); 2026 is growth so far this year.
Nuclear fleet outlook
5 stations · 6.0 GWEnd dates from EDF's fleet updates. EDF hopes to run Heysham 1 and Hartlepool to 2030 and is seeking 20 more years for Sizewell B. Hinkley Point C (3.2 GW) is expected around 2030.
Records
Records
—Highest and lowest half-hours and days, from NESO and Elexon data.