Bitmain Antminer S21+ : The Detailed Review
Miners
- tagwu
SUMMARY
The Bitmain Antminer S21+ is a state-of-the-art Bitcoin mining machine, offering a hash rate of 216 TH/s with an efficiency of 16.5 J/TH. It delivers a balanced combination of high performance, energy efficiency, and affordability, with a competitive payback period of 537 days. The machine’s profitability remains attractive, especially in low-cost electricity regions, with a daily net profit of $8.28 at $0.04/kWh. Its future viability is strengthened by its energy efficiency, scalability, and resilience to market fluctuations, making it an excellent choice for both individual miners and industrial mining farms.
Table of Contents
Technical Specifications
| Manufacturer | Bitmain |
| Model | Antminer S21+ (216Th) |
| Release | Feb 2025 |
| Size | 400 x 195 x 290mm |
| Noise level | 75db |
| Fan(s) | 2 |
| Power | 3564W |
| Interface | Ethernet |
| Temperature | 10 – 40 °C |
| Humidity | 10 – 90 % |
Comparing Bitmain Antminer S21+ with Other Top BTC Miners
| Model | Hashrate (TH/s) | Power (W) | Efficiency (J/Th) | Price ($) | Price per T ($/T) | Payback (Days) | Net Profit/Day ($) |
|---|---|---|---|---|---|---|---|
| Antminer S21 Pro | 234 | 3531 | 15.09 | 5,248 | 22.43 | 685 | 7.66 |
| Antminer S21+ | 216 | 3564 | 16.5 | 3,629 | 16.80 | 537 | 6.76 |
| Whatsminer M53S+ | 282 | 6816 | 24 | 3,225 | 11.44 | 479 | 6.74 |
| Canaan Avalon A15 XP | 206 | 3667 | 17.8 | 3,208 | 15.57 | 518 | 6.19 |
1. Outstanding Cost-Performance Ratio
The price per T is only $16.80, which is 25% lower than the S21 Pro ($22.43/T).
Although slightly higher than the Canaan Avalon A15 XP ($15.57/T), the S21+ offers better efficiency (16.5 J/Th vs. 17.8 J/Th).
2. Balanced Power Consumption
The S21+ has a power consumption of 3564W with an efficiency of 16.5 J/Th, which is a balanced choice for electricity costs at or below $0.04/KWh.
While not as efficient as the S21 Pro, the lower price offsets this difference.
3. Shorter Payback Period
The payback period is only 537 days, which is nearly 150 days shorter than the S21 Pro.
While the Whatsminer M53S+ has the shortest payback period at 479 days, its higher power consumption makes the S21+ a more energy-efficient long-term choice.
4. Daily Profitability
The S21+ generates a net daily profit of $6.76, which is close to the best-performing S21 Pro ($7.66).
This means it delivers a similar return with a much lower upfront cost.
5. Ideal for Long-Term Use
Compared to the high-power Whatsminer M53S+ and Avalon A15 XP, the S21+ offers lower heat generation and reduced operational costs, making it suitable for sustained use.
The Bitmain Antminer S21+
BTC Prices History
Bitcoin’s highest price was $108,135, recorded on December 17, 2024 (23 days ago).
Current price is 13.90% lower than its ATH.
All-Time Low (ATL):
Bitcoin’s lowest price was $67.81, recorded on July 6, 2013.
This represents a 137,198.06% increase compared to its ATL.
24-Hour Trading Volume:
Bitcoin’s trading volume in the past 24 hours was $64.57 billion, with a 2.80% rise compared to the previous day.
Market Capitalization:
Current market cap is $1.84 trillion, ranking Bitcoin #1 in the cryptocurrency market.
Fully Diluted Valuation (FDV):
FDV is estimated at $1.95 trillion, assuming the maximum supply of 21 million BTC is in circulation.
Bitcoin remains the dominant force in the cryptocurrency market, demonstrating consistent growth and market leadership.
Bitmain Antminer S21+ Profitability
Bitmain Antminer S21+, with a power consumption of 3564W, offers competitive profitability for Bitcoin mining under the assumption of an electricity cost of $0.04 per kWh. Here’s an overview of its profitability:
Daily Mining Rewards:
Bitcoin (BTC): 0.00012527 BTC
Forked Rewards (FB): 0.01162511 FB
Daily Revenue (Approximation): The combined mining rewards are valued at approximately $11.70 per day based on current market prices.
Electricity Costs:
- With a power consumption of 3564W running 24/7, daily electricity usage is 85.536 kWh.
- At $0.04/kWh, the daily electricity cost is $3.42.
Net Daily Profit: After subtracting electricity costs, the net daily profit is approximately: $11.70 – $3.42 = $8.28.
Profitability Highlights:
- The Bitmain Antminer S21+ demonstrates strong energy efficiency with a performance of 16.5 J/TH, ensuring competitive profitability.
- The machine is an excellent choice for miners seeking a balance between high hashrate, reasonable energy costs, and steady profitability.
This calculation assumes stable network difficulty, rewards, and electricity costs, making the S21+
Future Perspective of Bitmain Antminer S21+
Bitmain Antminer S21+ is a standout mining machine in today’s competitive cryptocurrency landscape, offering a compelling combination of energy efficiency, high hashrate, and profitability. As the cryptocurrency ecosystem continues to evolve, the future prospects of the S21+ remain promising for several reasons:
Increasing Demand for Energy-Efficient Mining
With a power efficiency of 16.5 J/TH, the S21+ is well-positioned to meet the increasing demand for energy-efficient mining hardware. As electricity costs rise globally and environmental concerns grow, miners will prioritize machines like the S21+ that optimize power consumption without sacrificing performance.
Scalability and Versatility
The S21+ provides a robust hashrate of 216 TH/s, making it versatile for deployment in both large-scale industrial mining farms and smaller mining operations. Its adaptability ensures it will remain relevant even as the Bitcoin network’s mining difficulty increases.
Resilience to Market Fluctuations
The profitability of the S21+ is supported by its low operating costs and competitive output, enabling it to remain viable even during periods of market downturns or lower Bitcoin prices. This resilience makes it an attractive long-term investment for miners.
Anticipation of Bitcoin Halving
With the next Bitcoin halving expected in 2024, mining rewards will reduce by 50%. The S21+’s high efficiency and lower energy costs will give it an edge, as less efficient machines may become unprofitable post-halving. This positions the S21+ as a strategic asset for miners planning for the future.
Ongoing Technological Advancements
CONCLUSION
The Bitmain Antminer S21+ offers a forward-looking solution for miners aiming to maintain profitability in an ever-changing market. Its blend of energy efficiency, cost-effectiveness, and robust performance makes it a valuable asset for long-term Bitcoin mining. As the mining industry continues to evolve, the S21+ is well-equipped to meet future challenges and opportunities, ensuring its relevance for years to come.
FAQs on Antminer S21+
What makes the Antminer S21+ stand out from other mining machines?
The Antminer S21+ offers an impressive hash rate of 216 TH/s, a competitive efficiency of 16.5 J/TH, and an affordable price per T ($16.80/T). This combination ensures high profitability with a shorter payback period compared to many competitors, making it a strong choice for miners seeking a cost-effective solution.
How profitable is the Antminer S21+ under typical conditions?
At an electricity cost of $0.04/kWh, the S21+ generates a daily revenue of approximately $11.70 and incurs electricity costs of $3.42, resulting in a net daily profit of $8.28. This profitability is subject to fluctuations in Bitcoin’s market price and mining difficulty.
Is the Antminer S21+ a good long-term investment?
Yes, the S21+ is built for long-term use with its energy-efficient design and competitive specifications. Its ability to remain profitable amid rising mining difficulty and market volatility makes it a resilient and strategic investment, especially for miners preparing for events like the Bitcoin halving.
