Bitdeer · Sep 2025
Sealminer A3 Hydro
- Hashrate
- 500.00 Th/s
- Power
- 6.75 kW
- Efficiency
- 13.50 W/Th
- Benchmark
- $0.13/kWh
Half a petahash per chassis at a price point that clears quickly on volume orders.
Top payouts / 24h
- QUAI$20.80
- PPC$17.82
- BTC$16.94
CatalogueSHA-256$20.80/day SHA-256$20.80/day SHA-256$20.80/day
SHA-256Hydro cooledReleased Mar 2026#10 by 24h profit
Bitmain
Antminer S21j XP Hydro
The 2026 refresh of the XP Hydro: 495 Th/s, revised control board, quieter pumps.
Hashrate
495.00 Th/s
Power draw
5.94 kW
Efficiency
12.00 W/Th
Profit / 24h
$20.60
Priced per unit on request — pricing moves with batch, condition and freight destination.
Technical faceplate drawing generated from this unit's own specs — board count, port layout and vent density track the real configuration. Photography available on request.
The short version
The j-revision is a mid-cycle refresh rather than a new platform — same 12.00 W/Th as the original XP Hydro, but with the updated control board, improved firmware watchdog and the newer pump assembly that cut warranty claims noticeably. Buy this over the 2024 XP Hydro if the delta is small.
- Revised control board and firmware watchdog
- Quieter, longer-life circulation pump
- 12.00 W/Th at 495 Th/s
Full specification
- Manufacturer
- Bitmain
- Model
- Antminer S21j XP Hydro
- Release
- Mar 2026
- Algorithm
- SHA-256
- Cooling
- Hydro — direct liquid loop
- Nameplate hashrate
- 495.00 Th/s
- Power at the wall
- 5940 W
- Efficiency
- 12.00 W/Th
- Benchmark power price
- $0.14/kWh
- Electricity cost / 24h at benchmark
- $19.96
- Gross revenue / 24h
- $20.60
- Profit / 24h
- $20.60
- Data source
- August 2026 dataset
Run the numbers
Break-even power price: $0.145/kWh
Gross / day
$20.19
Power / day
−$19.56
Net / day
$0.63
- Net per month
- $19.14
- Net per year
- $229.50
- Margin on revenue
- 3.1%
Gross revenue is the catalogue figure for this unit. Net subtracts electricity at your rate only — pool fees, hosting and hardware amortisation are not included, and payouts move with network difficulty.
Where the money comes from
Best-paying SHA-256 targets over the last 24 hours.
Top coins — revenue
- QUAISHA-256$20.60
- PPCSHA-256$17.65
- BTCSHA-256$16.77
Top coins — profit
- QUAISHA-256$20.60
- PPCSHA-256$17.65
- BTCSHA-256$16.77
Switching targets is a firmware and pool-config change, not a hardware change. Most operators point at the top line and let a profit switcher handle the rest.
What a quote includes
- Unit price at your order quantity
- Lead time and current batch availability
- Freight to your site, duties flagged separately
- Warranty terms — new, refurbished or as-is
- Payback estimate against your real power price
Comparable SHA-256 units
Bitdeer · Mar 2025
SealMiner A2 Pro Hyd 500T
- Hashrate
- 500.00 Th/s
- Power
- 7.45 kW
- Efficiency
- 14.90 W/Th
- Benchmark
- $0.12/kWh
Previous-generation 500T sled. Best value per terahash if power is cheap.
Top payouts / 24h
- QUAI$20.80
- PPC$17.82
- BTC$16.94
Bitmain · Jul 2025
Antminer S21 XP+ Hyd
- Hashrate
- 500.00 Th/s
- Power
- 5.50 kW
- Efficiency
- 11.00 W/Th
- Benchmark
- $0.16/kWh
500 Th/s at a flat 5.5 kW — the easiest retrofit in the range.
Top payouts / 24h
- QUAI$20.80
- PPC$17.82
- BTC$16.94