Bitmain Antminer S21 XP vs Canaan Avalon A1566
Mining profitability comparison for Bitcoin (BTC), Bitcoin Cash (BCH)
Verdict: Bitmain Antminer S21 XP vs Canaan Avalon A1566
For Bitcoin mining, the Bitmain Antminer S21 XP is the more efficient choice, delivering roughly 54% more hashrate per watt than the Canaan Avalon A1566. The Bitmain Antminer S21 XP draws 185W less, cutting electricity costs by about $113/year at $0.07/kWh. Bottom line: if power efficiency is your priority, the Bitmain Antminer S21 XP is the stronger pick — but confirm with your real electricity rate and current hardware prices below, since acquisition cost ultimately drives ROI.
Specifications
| Spec | Bitmain Antminer S21 XP | Canaan Avalon A1566 |
|---|---|---|
| Type | ASIC | ASIC |
| Algorithm | ||
| Hashrate (BTC) | 270 TH/s | 185 TH/s |
| Power Draw | 3245 W | 3430 W |
| Efficiency | 12 J/TH | 18.5 J/TH |
| Supported Coins | BTC, BCH | BTC, BCH |
| Release Year | N/A | N/A |
Hashrate & Efficiency per Coin
| Coin | Bitmain XP HR | Canaan A1566 HR | Power A | Power B | More Efficient |
|---|---|---|---|---|---|
| BTC | 270 TH/s | 185 TH/s | 3245 W | 3430 W | S21 ✓ |
| BCH | 270 TH/s | 185 TH/s | 3245 W | 3430 W | S21 ✓ |
Daily Electricity Cost at Different Rates
Electricity cost only (not including coin revenue). Lower is better for any given rate.
| Electricity Rate | Bitmain Antminer S21 XP | Canaan Avalon A1566 | Difference |
|---|---|---|---|
| $0.04/kWh | $3.12 | $3.29 | -$0.18 (A cheaper) |
| $0.06/kWh | $4.67 | $4.94 | -$0.27 (A cheaper) |
| $0.07/kWh | $5.45 | $5.76 | -$0.31 (A cheaper) |
| $0.1/kWh | $7.79 | $8.23 | -$0.44 (A cheaper) |
| $0.12/kWh | $9.35 | $9.88 | -$0.53 (A cheaper) |
| $0.15/kWh | $11.68 | $12.35 | -$0.67 (A cheaper) |
| $0.2/kWh | $15.58 | $16.46 | -$0.89 (A cheaper) |
Pros & Cons
Bitmain Antminer S21 XP
- Best efficiency among air-cooled SHA-256 ASICs (12 J/TH)
- 270 TH/s — highest hashrate in the S21 air-cooled lineup
- Standard air-cooled form factor: no special infrastructure needed beyond dedicated power
- Highest acquisition cost in the S21 air-cooled range (~$6,000–$7,500)
- 3,245 W still requires a dedicated 16 A / 220 V circuit
- Price premium over S21 Pro narrows at lower BTC prices
Canaan Avalon A1566
- Manufacturer diversity — an alternative to Bitmain/MicroBT duopoly
- Competitive efficiency at 18.5 J/TH
- Strong track record for reliability in large-scale deployments
- Smaller firmware and third-party support ecosystem
- Fewer authorised resellers outside Asia
- Slightly lower absolute hashrate than the S21 (185 vs 200 TH/s)
Frequently Asked Questions
Is the Bitmain Antminer S21 XP or Canaan Avalon A1566 more profitable for Bitcoin mining?
Based on hashrate-per-watt efficiency, the Bitmain Antminer S21 XP is more efficient for Bitcoin mining. However, actual profitability depends on your electricity cost, hardware acquisition price, and coin price — use the live calculator for exact numbers.
What is the power consumption difference between the Bitmain Antminer S21 XP and Canaan Avalon A1566?
For Bitcoin mining, the Bitmain Antminer S21 XP draws 3245 W while the Canaan Avalon A1566 draws 3430 W. The Bitmain Antminer S21 XP uses 185 W less power, which at $0.07/kWh saves ~$113 per year in electricity.
Can both the Bitmain Antminer S21 XP and Canaan Avalon A1566 mine the same coins?
Yes — both units can mine Bitcoin (BTC) and Bitcoin Cash (BCH). You can switch between these coins with a simple pool configuration change.
Which unit has a better ROI?
ROI depends on hardware acquisition price, electricity cost, and coin price trajectory. The more efficient unit (better J/TH or hashrate per watt) will generally have a lower operating cost per coin mined, but the absolute ROI timeline is determined by the purchase price. Always model both units in the MiningReturns calculator with your specific electricity rate and current market prices.
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Enter your electricity rate for live earnings estimates on both units.