Hydro output
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Reservoir + run-of-river
Hydro
Conventional hydro is concentrated in Scotland and Wales; pumped storage is listed separately to avoid double counting.
Hydro · installed / connected capacity1.91 GW
Conventional hydro only at end-May 2026.
Estimated from half-hourly readings
Average transmission output
Highest half-hourly reading
Live power flow
Hydro generation output
Half-hourly transmission-system readings from Elexon.
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30-day average
Typical hourly output
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Combining the latest 30 days of half-hourly readings.
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Location map
Operating sites
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5selected locations shown
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Coastline: Natural Earth · public domainHistoric daily comparison
Last seven days
Electrical energy generated each day.
Daily energy calculated from Elexon FUELHH half-hourly readings; today is accumulated so far.
Individual locations
Largest and selected sites
Installed power capacity and location from the latest official list.
SiteTypeRegionPower
SloyLarge hydroScotland152.5 MW
GlendoeLarge hydroScotland100 MW
ErrochtyLarge hydroScotland75 MW
FasnakyleLarge hydroScotland69 MW
LochayHydroScotland47 MW
Capacity & sitesDESNZ DUKES 5.11
Snapshot dateEnd-May 2026
Live & historyElexon FUELINST / FUELHH