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FIG · Equipment

Bitmain Antminer S21 XP Immersion

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Is the Antminer S21 XP Immersion profitable?

The Bitmain Antminer S21 XP Immersion (300Th) mines Bitcoin on the SHA-256 algorithm at 300 TH/s, drawing 4,050 W (13.5 J/TH). At $0.08 per kWh it earns about $11.27 a day, spends $7.78 of that on power, and keeps $3.49. That’s around $105 a month. It stops making money above roughly $0.116 per kWh.

That puts it #64 of 522 on daily profit across every miner we track, and #28 of 262 SHA-256 miners on efficiency. At the current best price of $3,484 it would pay for itself in about 2.8 years if today’s numbers held. They won’t, so treat that as a rough guide. It’s an immersion-cooled unit, released in September 2024.

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$2.92$8.35$251
$0.05$4.86$6.41$192
$0.06$5.83$5.43$163
$0.08$7.78$3.49$105
$0.10$9.72$1.55$46
$0.12$11.66-$0.40-$12
$0.15$14.58-$3.31-$99

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