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FIG · Equipment

Bitmain Antminer S21 XP Hyd 3U

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Is the Antminer S21 XP Hyd 3U profitable?

The Bitmain Antminer S21 XP Hyd 3U (860T) mines Bitcoin on the SHA-256 algorithm at 860 TH/s, drawing 11,180 W (13.0 J/TH). At $0.08 per kWh it earns about $32.30 a day, spends $21.47 of that on power, and keeps $10.83. That’s around $325 a month. It stops making money above roughly $0.120 per kWh.

That puts it #16 of 522 on daily profit across every miner we track, and #21 of 262 SHA-256 miners on efficiency. At the current best price of $8,909 it would pay for itself in about 2.3 years if today’s numbers held. They won’t, so treat that as a rough guide. It’s a hydro (water-cooled) unit, released in January 2025.

Profit at different electricity prices

Same machine, same day, different power bill. Find the row closest to what you pay.

Power pricePower / dayProfit / dayProfit / month
$0.03$8.05$24.25$727
$0.05$13.42$18.88$566
$0.06$16.10$16.20$486
$0.08$21.47$10.83$325
$0.10$26.83$5.47$164
$0.12$32.20$0.10$3
$0.15$40.25-$7.95-$238

Figures updated 16:26 UTC, 25 September 2026, using today’s network difficulty and coin prices. Estimates, not financial advice.