Storage / live balancing
Batteries, found.
Live battery actions now use Elexon’s BM Unit register to identify assets by their names and operators—not a guessed list of cryptic codes.
What this can see
Registered Balancing Mechanism units and their latest accepted operating levels. This is not the whole GB battery fleet.
What batteries are doing now
Positive levels mean exporting power; negative levels mean consuming power. The feed refreshes every five minutes.
Identified BM units
…
Units, not unique sites
Registered export
…
Nameplate generation capacity
Exporting now
…
Latest accepted battery levels
Charging now
…
Waiting for live feed
Checking the register and live actions…
Battery names and operating levels come from separate Elexon feeds and are joined here.
The batteries going into homes
The separate MCS series covers certified retrofit domestic batteries. It does not include commercial systems, new-build installations or non-MCS work.
Apr 2025–Mar 2026
44,033
Certified installations
Sampled capacity
414 MWh
42,903 installations with capacity data
Mar 2026
5,774
Installations in the latest month
Largest size band
11–30 kWh
£630/kWh median installed cost
The official battery series starts in September 2023, so it cannot supply a defensible all-time fleet total. The dashboard shows the measured period instead of inventing one.
Sources and coverage
Each source answers a different question; none is presented as a complete census.
The Embedded Capacity Register is a valuable regional register, but it covers National Grid Electricity Distribution—not every distribution network in Great Britain. Read the methodology.