Skeeby
35 MW, about 70 MWh (2 hours, from the capacity market de-rating class) in South Lancashire, Yorkshire and Humber. Everything on this page is read from published data for the 364 days to 16 October 2026, or is labelled as an estimate.
What it is
| Registered power | 35 MW response and reserve auction registration |
| Storage duration | 2 hours capacity market de-rating class |
| Charging zone | South Lancashire, Yorkshire and Humber |
| Connection site | North Yorkshire |
| Postcode | DL10 7ED |
| Balancing mechanism unit | 2__FCMRO004 a supplier unit registered by the company that trades it; its balancing actions are counted on this page |
Who owns it and who trades it
| Traded by | BGI Trading Limitedruns several sitesconfirmed, Elexon's register |
| Owned by | HARMONY SK LIMITED |
| Owner established from | capacity market registered holder |
Market registers name the party that sells into the market, which for a battery is usually an optimiser under contract rather than the owner. Elexon's balancing mechanism unit register names the seller here and the name is checked against it on every build. How we tell them apart
What it earned
| Line | 364 days to 16 October 2026 |
|---|---|
| Balancing mechanism | −£149k |
| Response and reserve auctions auction implied | £70k |
| Capacity market counted from 29 July 2026, the first day its meter shows energy flowing | £2k |
| Three lines together | not netted |
Balancing is offer revenue and does not net off the cost of the power. The response and reserve figure is the value implied by the published auction results, award quantity times clearing price times the length of the delivery window, and not a settled payment. Capacity market income is the cleared price raised for inflation where the auction set a base period, split by month on EMRS's weights. Method
Outside the balancing mechanism, derived from the meter
Elexon publishes what this unit's meter recorded every half hour. Take away the balancing volumes NESO accepted and what is left is the position the unit ran outside the balancing mechanism: its wholesale trading, its frequency response delivery, and its losses, together. This unit held a frequency response contract in 538 of those half hours. The energy the contract asked of it, contracted megawatts times NESO's published delivery curve at the measured grid frequency, is taken out of the position and valued at the imbalance price, because it sits outside the unit's declared position and that is the price Elexon settles it at. What remains is the traded position, valued at the market index. The volumes are measured. The prices are public benchmarks, not this unit's trades. The product is derived, and is shown apart from the three measured lines above. 168 days to 11 October 2026, 45 of them still provisional in Elexon's settlement runs. Method and caveats
| Line | MWh or £ |
|---|---|
| Metered export, what crossed the meter out | 4,747 MWh |
| Metered import, what crossed the meter in | 5,441 MWh |
| Equivalent full cycles, everything sent out over one full charge | 67.8 over 168 days, 147 a year at that rate |
| Apparent meter to meter efficiency | 87%, an ordinary battery: round trip losses alone |
| Balancing offers accepted | 1,968 MWh |
| Balancing bids accepted | 3,411 MWh |
| Position outside balancing, export | 5,633 MWh |
| Position outside balancing, import | 4,884 MWh |
| Of which expected response delivery, net | −587 MWh 76 out, 663 in |
| Traded position, net | 1,336 MWh 5,857 out, 4,521 in |
| Traded position at the market index, sold | £967k |
| Traded position at the market index, bought | £421k |
| Traded position, net, at the index | £546k |
| Response delivery, net, at the imbalance price | −£84k −£80k at the index |
| Balancing and outside balancing together | £358k £22.22/kW/yr |
When it moved, against when power was dear
Across every half hour this unit was metered the market index averaged £113.93. What it sent out was worth £165.17 a megawatt hour at that same index, 1.45 times the average. What it took in was worth £93.22, 0.82 times. Selling above one and buying below one is a unit positioned into the dear half hours and out of the cheap ones. It measures the half hours it chose, not the price anyone paid it, which is not published.
What it paid to buy energy back
When NESO accepts a bid, this unit delivers less than it had already sold, or takes more in. It pays for the energy it no longer delivers, and that payment is most of what makes the balancing figure above negative. Whether that is a cost or a margin depends on the price it paid. Across 3,411 MWh of accepted bids it paid an average of £114.17 a megawatt hour. The market index averaged £158.14 across those same half hours, so it bought back at £43.97 a megawatt hour below the going price.
| Price it paid | Volume | Average | Cash |
|---|---|---|---|
| below zero | 85 MWh | −£11.93 | £1k received |
| £0 to £25 | 56 MWh | £13.63 | £758 |
| £25 to £50 | 107 MWh | £36.50 | £4k |
| £50 to £75 | 138 MWh | £65.89 | £9k |
| £75 to £100 | 338 MWh | £89.27 | £30k |
| above £100 | 2,686 MWh | £128.98 | £346k |
On 85 MWh the price was below zero: NESO paid this unit an average of £11.93 a megawatt hour to take energy, £1k in all. That is a constrained network with more generation on it than it can move.
The other direction, offers, is much smaller here: 1,968 MWh where NESO asked for more, paid at an average of £144.81 against an index of £99.17.
Checks this unit did not pass cleanly. Published anyway, because a flagged figure with its flag is more use than a blank.
- only 168 of 364 days metered
Where it stands
| All three measured lineswhole fleet, £/kW/yr | 21st percentile230 units |
Percentiles, so 90 means better than nine in ten of the cohort named beside it, on that measure alone, over the same 364 days. Rates are pounds per kilowatt per year, annualised over the days the unit has been on the system, the same figures the performance league ranks on. A high position in the taken-in table is not a fault: a constraint asset is paid to charge, and charging is its job.
The nearest comparables
The five nearest in size in England and Wales, and this battery among them, ranked by what each was paid for every kilowatt it holds over the 364 days to the same date. They run for about the same length of time. Same market, same rules, same weather.
| Battery | MW | Hours | Measured, per kW |
|---|---|---|---|
| Welkin Mill | 33 | 2h | £118.3/kW/yr |
| Wormald Green BESS | 33 | 2h | £67.5/kW/yr |
| Hyde | 37 | 2.5h | £55.6/kW/yr |
| Rusholme | 35 | 1.5h | £34.9/kW/yr |
| Contego Battery | 36 | 2h | £24.2/kW/yr |
| Skeebythis battery | 35 | 2h | not netted |
The three lines are not added together for this site. It paid £439k to charge and the lines we can measure paid it £361k. The energy it bought was sold in the wholesale market and nothing published measures that sale, so subtracting one from the other would show a loss it does not make.
See it on the map
Every figure on this page traces to a published file. If something here is wrong about your asset, the methods section says how to tell us.