Bitdeer
SEALMINER A2
AvailableNew
- Hashrate
- 226TH/s
- Power
- 3,729W
- Efficiency
- 16.5J/TH
- Air-cooled
- SHA-256
Price on request
Picture of the model. The unit you receive may differ in appearance.
Bitmain Antminer S21+ 216 TH/s Bitcoin Miner
The Antminer S21+ is an air-cooled Bitcoin miner from Bitmain, rated at 216 TH/s and 3,564 W (16.5 J/TH). It runs on 220–277 V single-phase power.
- Hashrate
- 216TH/s
- Power
- 3,564W
- Efficiency
- 16.5J/TH
- Cooling
- Air-cooled
- Coins
- BTC, BCH, BSV
- Input voltage
- 220–277 V
Retail price
$1,519.05
per unit · $7.03 per TH/s
- 1–4 units$1,519.05
- 5+ unitsVolume pricing available
View volume pricingVolume pricing
| 1–4 units | $1,519.05 |
|---|---|
| 5–19 units | Volume pricing on request |
| 20–99 units | Request Quote |
| 100+ units | Contact Mining Sales |
- Ships in
- 5–10 business days
$1,519.05Free standard shipping. Excludes duties and taxes
Product overview
The Antminer S21+ is an air-cooled Bitcoin miner from Bitmain, rated at 216 TH/s and 3,564 W (16.5 J/TH). It runs on 220–277 V single-phase power.
Condition: New.
216 TH/s
Rated hashrate
16.5 J/TH
Energy per terahash
Air-cooled
Cooling method
3,564 W
Power draw at the wall
Technical specifications
Specifications as published by the manufacturer · last verified October 1, 2026 · Bitmain documentation
Fields the manufacturer does not publish are left out rather than estimated.
Performance
| Hashrate | 216 TH/s (±3%) |
|---|---|
| Power consumption | 3,564 W (±5%) |
| Efficiency | 16.5 J/TH |
| Algorithm | SHA-256 |
| Supported coins | BTC, BCH, BSV |
Power & electrical
| Input voltage | 220–277 V AC |
|---|---|
| Electrical phase | Single-phase |
| Input frequency | 50-60 Hz |
| Maximum input current | 20 A |
Cooling
| Cooling type | Air-cooled |
|---|---|
| Noise level | 76 dB |
Physical & environment
| Dimensions (L × W × H) | 450 × 219 × 293 mm |
|---|---|
| Net weight | 21.5 kg |
| Packaged dimensions | 630 × 350 × 430 mm |
| Gross weight | 24.5 kg |
| Operating temperature | -20–45 °C |
| Storage temperature | -20–70 °C |
| Operating humidity (non-condensing) | 10–90 % RH |
| Maximum altitude | 2,000 m |
Connectivity
| Network interface | RJ45 Ethernet 10/100M |
|---|
General
| Release date | October 2024 |
|---|---|
| Manufacturer warranty | 365 days from the shipping date |
Mining economics
Estimate output and operating cost for the Antminer S21+ at your own power price. Results are calculations from the inputs shown, not a forecast.
Estimated results (per miner, at $0.06/kWh)
- Est. revenue / day
- $7.67
- 0.00009509 BTC mined / day
- Electricity cost / day
- $5.13
- 85.5 kWh × $0.06
- Operating result / day
- $2.54
- Revenue less electricity
- Revenue / 30 days
- $230.04
- Electricity / 30 days
- $153.96
- Operating result / 30 days
- $76.07
- Energy / day
- 85.5 kWh
- Energy / 30 days
- 2,566 kWh
- Break-even electricity
- $0.090/kWh
Estimates only. Not financial advice. Results vary with network difficulty, pool fees, uptime, market conditions, the Bitcoin price and the cost of electricity. They are calculated from the inputs shown at constant difficulty and price, and leave out the cost of the hardware, cooling, downtime, taxes and depreciation.
Network data as of 2026-10-28 13:00 UTC · price: mempool.space · difficulty: mempool.space · block reward 3.1391 BTC
Electricity cost by power price
Daily and 30-day electricity cost of Antminer S21+ at 3,564 W, with the estimated revenue beside it.
| Electricity price | Electricity / day | Electricity / 30 days | Est. revenue / day | Est. net / day |
|---|---|---|---|---|
| $0.03/kWh | $2.57 | $76.98 | $7.67 | $5.10 |
| $0.05/kWh | $4.28 | $128.30 | $7.67 | $3.39 |
| $0.06/kWhselected | $5.13 | $153.96 | $7.67 | $2.54 |
| $0.07/kWh | $5.99 | $179.63 | $7.67 | $1.68 |
| $0.10/kWh | $8.55 | $256.61 | $7.67 | -$0.89 |
| $0.12/kWh | $10.26 | $307.93 | $7.67 | -$2.60 |
| $0.15/kWh | $12.83 | $384.91 | $7.67 | -$5.16 |
| $0.20/kWh | $17.11 | $513.22 | $7.67 | -$9.44 |
Compare miners
How the Antminer S21+ compares with the closest alternatives by cooling type and efficiency.
| Model | Hashrate | Power | Efficiency | Cooling | Price | $/TH | Side by side |
|---|---|---|---|---|---|---|---|
| Antminer S21+ (this miner) | 216 TH/s | 3,564 W | 16.5 J/TH | Air-cooled | $1,519.05 | $7.03 | |
| SEALMINER A2 | 226 TH/s | 3,729 W | 16.5 J/TH | Air-cooled | On request | — | Side by side |
| SealMiner A2 228T | 228 TH/s | 3,730 W | 16.4 J/TH | Air-cooled | $3,561.55 | $15.62 | Side by side |
| NerdOCTAxe 9.6T | 9.6 TH/s | 160 W | 16.7 J/TH | Air-cooled | $284.05 | $29.59 | Side by side |
| NerdQaxe++ Rev 6.1 6T | 6 TH/s | 100 W | 16.7 J/TH | Air-cooled | $274.55 | $45.76 | Side by side |
Written comparisons: S21 XP vs S21+, M60S++ 218T vs S21+
Shipping
Standard shipping is free to every destination we ship to. If you need it faster, choose express shipping at checkout and we quote it before you pay. Import duties, taxes and customs clearance are set by the destination country and are the importer's responsibility unless your quotation states otherwise.
- Package dimensions
- 630 × 350 × 430 mm
- Gross weight
- 24.5 kg
Documentation
Links open the manufacturer's own documentation on the manufacturer's website.
Antminer S21+ questions
How much electricity does the Antminer S21+ use?
The Antminer S21+ draws 3,564 W at the wall (±5%). Running continuously that is about 85.5 kWh per day and 2,566 kWh per 30 days. Multiply by your electricity price to get the running cost, or use the calculator.
What is the hashrate and efficiency of the Antminer S21+?
Rated hashrate is 216 TH/s (±3%) at 16.5 J/TH. Lower J/TH means less energy per unit of hashrate. See Understanding J/TH.
What voltage does the Antminer S21+ need?
Input voltage is 220–277 V AC, single-phase at 50-60 Hz. It cannot run on a 110–120 V household circuit. Confirm your supply, breaker and cabling with a qualified electrician before ordering. See Bitcoin miner power requirements.
How is the Antminer S21+ cooled?
The Antminer S21+ is air-cooled with built-in fans. It needs a steady supply of cool intake air and a path to exhaust hot air. Rated noise is 76 dB. Compare options in Air vs hydro Bitcoin miners.
How loud is the Antminer S21+?
The manufacturer rates it at 76 dB. That is industrial-level noise and unsuitable for a living space without a dedicated, sound-treated enclosure.
Can I order the Antminer S21+ in bulk?
Yes. Orders are handled by quantity: small quantities through checkout when a price is published, and larger quantities by quotation with pricing, batch and logistics confirmed by sales. Request a wholesale quote.
Similar miners
The closest alternatives by cooling type and efficiency.
Bitdeer
SealMiner A2 228T
AvailableNew- Hashrate
- 228TH/s
- Power
- 3,730W
- Efficiency
- 16.4J/TH
- Air-cooled
- SHA-256
$3,561.55$15.62/TH
NerdMiner
NerdOCTAxe 9.6T
AvailableNew- Hashrate
- 9.6TH/s
- Power
- 160W
- Efficiency
- 16.7J/TH
- Air-cooled
- SHA-256
$284.05$29.59/TH
NerdMiner
NerdQaxe++ Rev 6.1 6T
AvailableNew- Hashrate
- 6TH/s
- Power
- 100W
- Efficiency
- 16.7J/TH
- Air-cooled
- SHA-256
$274.55$45.76/TH
Wholesale & project supply
Need the Antminer S21+ in volume?
Send quantity, destination and required date. Sales replies with batch availability, unit pricing and freight options for your order size.
- 20+ units
- Mixed models
- Container orders
- Project procurement
Antminer S21+
$1,519.05