Antminer S21 Pro – 245 TH/s (Batch October 2025)

Antminer S21 Pro – 245 TH/s

High-Efficiency SHA-256 ASIC Miner for Bitcoin Mining

Product Overview

The Antminer S21 Pro is a high-efficiency SHA-256 ASIC miner designed for reliable and scalable Bitcoin mining. With a hashrate of 245 TH/s and an energy efficiency of 15 J/TH, it delivers a strong balance between performance and operating cost, making it suitable for both individual miners and large-scale mining farms.

Built with advanced chip technology and an optimized air-cooling system, the S21 Pro offers stable operation, consistent performance, and straightforward integration into existing mining setups. Flexible deployment options, including direct shipping or hosted mining with competitive electricity rates, further enhance overall profitability.

Performance Highlights

• Hashrate of 245 TH/s for SHA-256 mining

• Energy efficiency of 15 J/TH

• Power consumption of 3,675 W

• Optimized for Bitcoin (BTC) and other SHA-256-based cryptocurrencies

• Air-cooled design for dependable day-to-day operation

Historical and Projected Profitability

Based on data from April to August 2025 and an electricity rate of $0.04/kWh:

• Daily profitability range: $10 to $15 USD

• Average daily profit: approximately $12.81 USD

• Estimated ROI: 8 to 14 months, depending on Bitcoin price, network difficulty, and electricity costs

Profitability figures are indicative and subject to market conditions.

Technical Specifications

• Vendor: Antminer

• Brand: Bitmain

• Model: Antminer S21 Pro

• Algorithm: SHA-256

• Supported coins: Bitcoin (BTC), Bitcoin Cash (BCH)

• Hashrate: 245 TH/s

• Power consumption: 3,675 W

• Energy efficiency: 15 J/TH

• Cooling system: Air-cooling

• Noise level: 75 dB

• Dimensions: 450 × 220 × 300 mm

• Operating temperature: 5°C to 45°C

• Network interface: Ethernet

• Power cord: Shipped according to client destination

• Release date: August 2025

Profitability and ROI Insights

• Earnings depend on Bitcoin price, network difficulty, and uptime

• Hosting calculations are based on $0.04/kWh electricity rates

• Use the Profitability Calculator to estimate customized earnings and ROI

Deployment Options: Shipping or Hosting

Shipping

• Direct shipment from Shenzhen

• Delivery via DHL, UPS, FedEx, or TNT

• Estimated delivery time: 5–7 days

• Secure packaging with tracking

• Import taxes may apply depending on destination

• Bulk orders over $500,000 qualify for custom pricing

Hosting

• Available locations: USA, Dubai, Norway, Finland, Ethiopia, Nigeria

• Electricity rate: from $0.04/kWh

• Fully managed operation with 24/7 monitoring and maintenance

Estimated ROI by Location

• USA: $0.065/kWh – 20.23 months

• Nigeria: $0.047/kWh – 17.40 months

• Ethiopia: $0.054/kWh – 18.58 months

• Dubai: $0.059/kWh – 18.84 months

• Finland: $0.069/kWh – 20.85 months

• Norway: $0.064/kWh – 21.85 months

Hosting Benefits

• 7-year full warranty

• 95 percent or higher uptime

• Deployment within 1 to 7 days

• Exchange services for fiat currencies and cryptocurrencies

• 0 percent mining fee, all mined coins belong to you

• Reduced infrastructure costs with access to low-cost energy

Key Features and Benefits

• Strong SHA-256 hashrate with balanced energy efficiency

• Advanced chip technology for consistent Bitcoin hash power

• Compact and durable design for easy farm integration

• Built-in security safeguards protecting mining operations

• Easy monitoring of hashrate, power usage, and temperature

• Stable Ethernet connectivity for remote management

• Supports SHA-256 algorithm and multi-coin mining

Why Choose the Antminer S21 Pro

The Antminer S21 Pro delivers dependable SHA-256 mining performance with efficient power usage and a proven air-cooled design. Its balance of hashrate, efficiency, and flexibility makes it a solid choice for miners looking to maximize Bitcoin profitability through either self-managed or hosted deployments.

Warranty, Shipping, and Support

• Warranty: 7 years for hosted units, 12 months for shipped units (void if misused)

• Shipping: Global delivery within 5–7 days with tracking; bulk orders receive custom quotes

• Payment options: Cryptocurrency or wire transfer; hosting fees deducted from mining revenue

• Customer support: 24/7 assistance for setup, troubleshooting, and ongoing operation

Pre-orders are open for October 1, 2025 delivery. Contact us for bulk orders, hosting packages, or custom pricing.