Antminer S21+ – 235 TH/s

Antminer S21 – 235 TH/s: High-Efficiency SHA-256 ASIC Miner for Bitcoin Mining
The Antminer S21 is a top-tier ASIC miner built for the SHA-256 algorithm, delivering a powerful 235 TH/s hashrate for mining Bitcoin (BTC) and other SHA-256-based cryptocurrencies like Bitcoin Cash (BCH). With 16.50 J/TH efficiency and 3877W power consumption, it offers a great balance of performance and cost, ideal for small and large mining operations. Its advanced chips ensure high performance with low environmental impact, and its compact design fits easily into any setup. Choose shipping or hosting at $0.04/kWh electricity rates to boost profitability.
Historical and Projected Profitability
Profitability Chart: Based on recent data, daily earnings average around $7.97 USD at $0.04/kWh. Actual ROI depends on electricity rates and Bitcoin price/difficulty.
Technical Specifications
Specification
Details
Vendor
Antminer
Brand
Bitmain
Model
S21
Hash Rate
235 TH/s
Algorithm
sha-256
Supported Coins
Bitcoin (BTC)
Power Consumption
3877 W
Energy Efficiency
16.50 J/TH
Cooling System
Air-cooling (2 fans)
Power Cord
Shipped according to client’s destination
Dimensions
400x195x290 mm
Noise Level
75 dB
Operating Temperature
10°C to 40°C
Network Interface
Ethernet
Release Date
June 2025
 
Profitability and ROI Insights
Use our Profitability Calculator to estimate earnings based on Bitcoin prices, $0.04/kWh hosting rates, and network difficulty.
Flexible Deployment Options: Shipping or Hosting
Shipping: Direct delivery from Shenzhen via DHL, UPS, FedEx, or TNT in 5-7 days. Secure packaging with tracking; costs vary by location.
Hosting: Deploy in USA, Dubai, Norway, Finland, Ethiopia or Nigeria with $0.04/kWh rates. Enjoy hands-off operation with 24/7 maintenance.
       Location
       Electricity Rate
       ROI
USA 🇺🇸
$0.065 / kWh
16.7 month(s)
Nigeria 🇳🇬
$0.047 / kWh
14.4 month(s)
Ethiopia 🇪🇹
$0.054 / kWh
15.3 month(s)
Dubai 🇦🇪
$0.059 / kWh
15.6 month(s)
Finland 🇫🇮
$0.069 / kWh
17.2 month(s)
Norway 🇳🇴
$0.064 / kWh
18.1 month(s)
Hosting Benefits
7-Year Full Warranty
95%+ Uptime
Deployment in 1-7 Days
Exchange Services for FIAT and cryptocurrencies
0% Mining Fee – Keep all coins Hosting reduces infrastructure needs and maximizes profits with low-cost energy.
Key Features and Benefits
High Hashrate and Efficiency: Offers 235 TH/s and 16.50 J/TH efficiency for lower energy costs.
Advanced Chip Technology: Uses top chips for strong Bitcoin hash power.
Compact Design: Fits at 400x195x290 mm with durable build.
Enhanced Security: Protects against threats with built-in safeguards.
Easy Monitoring: Tracks hashrate, power, and temperature with adjustable settings.
Versatile Algorithm: Supports SHA-256 and multi-coin mining.
Stable Connectivity: Ensures reliable remote management via Ethernet.
Why Choose the Antminer S21?
The Antminer S21 shines in SHA-256 mining with 235 TH/s hashrate and 16.50 J/TH efficiency, perfect for all miners. Its compact design and simple software suit any scale, while $0.04/kWh hosting boosts profitability. With solid security, it’s ideal for maximizing Bitcoin earnings.
Warranty, Shipping, and Support
Warranty: 7 years for hosted, 12 months for shipped (voided by misuse).
Shipping: 5-7 day global delivery with tracking; bulk orders get quotes.
Payment Options: Accepts cryptocurrency or wire transfer; hosting costs deduct from profits.
Customer Support: 24/7 assistance for setup, troubleshooting, and more.
Order now and start mining Bitcoin efficiently—shipped or hosted. Contact us for bulk deals.