Bitmain's specification sheet for the Antminer S23 XP Hyd. gives 600 TH/s at 5,340 W on the wall, 8.9 J/TH, and under the heading "Phase" it gives the number 3. The input voltage row reads 380~415. That one row settles whether the machine is relevant to a British reader, before efficiency gets a hearing.
Start with the economics anyway, because they are better than the last few machines we looked at. Bitcoin's difficulty is 140.6 trillion, implying 1,006 EH/s. The last 144 blocks paid 3.136755 BTC each including fees, which at £59,886 is 2.6612p per terahash per day net of a one per cent pool fee. The 600 TH/s bin grosses £15.97 a day and draws 128.2 kWh to do it, so it needs electricity at 12.46p per kWh to cover its own power and nothing else.
Nobody in Britain buys domestic electricity at 12.46p. Ofgem's cap for the quarter to 31 December 2026 sets the electricity unit rate at 26.32p, 2.11 times breakeven, which would lose £17.76 a day per machine. Octopus Agile in Eastern England had published 46 of its 48 half-hourly rates for today when we looked, median 28.27p, with one cheap half-hour at 10.30pm of 5.35p. Eleven of the 46 came in under 12.46p, five and a half hours of the day; the other seventeen and a half lose money. One point in the reader's favour: VAT has been removed from electricity until 31 March 2027, and Octopus's feed bears that out, so these are the figures a household actually pays.
Then the supply
A British house has single-phase 230 V and this machine will not accept it. At 5,340 W across three phases at 400 V it draws 7.71 A per phase, and Bitmain's sheet caps input current at 12 A with the footnote "Caution: Wrong input voltage may cause server damaged." A 13 A socket delivers about 2.99 kW, so the machine is 1.79 times over it. A 32 A radial delivers 7.36 kW, which looks sufficient and is not, because the shortfall is voltage and phase, not amperage.
The cooling is the second installation, and Bitmain's documentation gives it away: the machine is a cold plate with 10 mm coolant connectors, no fans and no pump, and its coolant instructions sit in chapter 9 of the manual for a liquid-cooling shipping container. Bitmain's own 200 kW cabinet for these machines, $20,000, specifies a 7.5 kW pump at 79 dBA, a 550 kg external cooler 2.3 m tall that "should be placed outdoors", and a 326 A three-phase supply.
Bitmain publishes no noise figure for any of its seven hydro models, worth knowing when a reseller prints 50 dB. Whatever the box measures, the loop does not remove the noise; it moves it to a fan unit in the garden at 78 dBA.
Three-phase at 380–415 V and a 550 kg cooler outdoors. The efficiency figure is the least important number on the sheet.
The machine you can actually buy
Bitmain's store lists the S23 XP Hyd. at $15,300 shipping from November 2026, which is $25.50 per terahash before VAT, freight or duty — all three expressly excluded. It does not list a plain "S23 Hydro" at all. That machine, 580 TH/s at 5,510 W and 9.5 J/TH, exists only at resellers: a UK seller quotes £10,800 excluding VAT for the 580 TH/s bin, £18.62 per terahash, or £22.34 with VAT. Two sellers advertising 580 TH/s will only sell the 563 TH/s bin, so check which number the price divides into.
And because Bitmain does not sell it, nobody buying one holds a Bitmain warranty: the terms say the 365-day cover "only applies to the original purchaser who purchased the machine directly from BITMAIN". There is no Bitmain repair centre in the UK, and European returns go to the Netherlands, customs on the buyer both ways.
| Hashrate and power, 600T-10 bin | 600 TH/s ±3%, 5,340 W ±5% |
| Efficiency | 8.9 J/TH at 35°C inlet coolant |
| Supply | 380–415 V, three-phase, 12 A max |
| Network hashrate, difficulty | 1,006 EH/s, 140.6T |
| Hashprice | 2.6612p per TH per day, net 1% pool fee |
| Gross revenue, consumption | £15.97 a day, 128.2 kWh |
| Breakeven electricity | 12.46p per kWh |
| Ofgem cap unit rate to 31 Dec 2026 | 26.32p per kWh |
| Agile half-hours below breakeven | 11 of 46 published |
| Revenue per installed MW | £2,990 a day |
| Price, Bitmain store | $15,300, $25.50/TH ex-VAT, ships November |
Specifications, price, warranty and the cooling-cabinet sheet from Bitmain's own product and support pages; reseller prices from a UK seller and five independent retailers; difficulty and the 144-block reward including fees from mempool.space, with network hashrate derived from difficulty rather than taken from its reported figure; bitcoin price in sterling from CoinGecko. All retrieved 26 October 2026, 06:23–07:04 UTC. Electricity is Octopus Agile, Eastern England, 46 of 48 half-hourly rates published for today at the time of writing — that region and that day only. Ofgem's 26.32p is the typical direct debit unit rate for 1 October to 31 December 2026, the cap period in force; Ofgem states VAT is removed from electricity to 31 March 2027, and Octopus returns identical VAT-exclusive and VAT-inclusive values today, so no uplift applies above. Hashrate, wattage and the $15,300 are all the 600T-10 bin; the £10,800 is a different machine, the 580 TH/s S23 Hyd. at 9.5 J/TH, on the VAT basis stated. Contested: one UK listing gives 23.5 A per phase and 0 dB for a 5,510 W machine, which is impossible, so Bitmain's 12 A is used. Revenue is gross of hosting, downtime and depreciation. Not a recommendation and not a forecast.