# Solo Mining Bitmain Antminer S21 XP Hydro on Bitcoin (BTC)

Machine-readable solo mining datasheet for running **Bitmain Antminer S21 XP Hydro** on the **Bitcoin (BTC)** SHA-256 network. Evaluates hashrate output, electrical operational expenditure, Poisson block-finding probabilities, and mining economics tracked by BackPoW.

## Executive Summary

- Target Rig: Bitmain Antminer S21 XP Hydro (ASIC)
- Target Network: Bitcoin (BTC) — Algorithm: SHA-256
- Rig Hashrate: 473.00 TH/s (4.730000e+14 H/s)
- Power Consumption: 5,676 W (136.22 kWh/day)
- Energy Efficiency: 12.00 J/TH
- Network Hashrate: 1089.78 EH/s (1.089781e+21 H/s)
- Network Hash Share: 4.340321e-07 (0.000043%)
- Expected Block Discovery: about a 1-in-42 chance per year (mean time: ~41.3 years)
- Operational Breakeven Electricity: 0.1265 USD/kWh

## Solo Mining Metrics Table

| Metric | Value | Unit | Description |
| --- | --- | --- | --- |
| Mining Device | Bitmain Antminer S21 XP Hydro | text | Hardware model name |
| Device Class | ASIC | text | ASIC, GPU, or CPU architecture |
| Device Hashrate | 473.00 TH/s | H/s | Nominal hashrate on SHA-256 |
| Device Power Draw | 5,676 | Watts | Power consumption at wall |
| Energy Efficiency | 12.00 J/TH | unit | Energy per unit hash computation |
| Network Hashrate | 1089.78 EH/s | H/s | Total active network hash power |
| Network Difficulty | 140,577,680M | number | Current consensus target difficulty |
| Block Time (Observed) | 564.7 | seconds | Average interval between blocks |
| Block Reward | 3.1400 | BTC | Full coinbase block reward + fees |
| Coin Spot Price | 82,667.0000 | USD | Current market exchange rate |
| Single Block Value | 259,574.38 | USD | Gross fiat value of one block |
| Mean Time to Block | 41.3 years | time | T = (Nethash / Hashrate) * BlockTime |
| Daily Block Probability | 0.006640% | percent | 24-hour Poisson chance |
| Monthly Block Probability | 0.1990% | percent | 30-day Poisson chance |
| 1-Year Block Probability | 2.40% | percent | 365-day Poisson chance |
| 3-Year Block Probability | 7.02% | percent | 3-year cumulative chance |
| Expected Blocks / Year | 0.0243 | count | Average over 365.25 days |
| Daily Gross Output | 0.000209 | BTC | Expected daily coin yield |
| Daily Gross Value | 17.24 | USD | Revenue before power costs |
| Daily Energy Consumed | 136.22 | kWh/day | Kilowatt-hours consumed |
| Power Cost @ 0.05 USD/kWh | 6.81 | USD/day | Low industrial tariff |
| Power Cost @ 0.08 USD/kWh | 10.90 | USD/day | Standard mining tariff |
| Power Cost @ 0.10 USD/kWh | 13.62 | USD/day | Residential tariff |
| Breakeven Electricity | 0.1265 | USD/kWh | Max rate before loss |
| Hardware Price | 6,400 / 6,735 / 8,127 USD | USD | Market range (min / med / max) |

## Poisson Block Discovery Model & Variance

Solo mining block discovery follows a memoryless Poisson process where every hash attempt has an identical, independent success probability.

- Formula: `P(X >= 1) = 1 - exp(-t / T)`
- `t` is mining duration in seconds
- `T` is mean time between blocks: `T = (Network Hashrate / Miner Hashrate) * Block Time`

Luck percentile table (reference electricity rate 0.08 USD/kWh):

| Luck Scenario | Percentile | Duration | Power (kWh) | Cost @ 0.08 |
| --- | --- | --- | --- | --- |
| 10% Lucky Hit | 10th | 4.3 years | 216,141.6 | 17,291.32 USD |
| 50% Median | 50th | 28.6 years | 1,421,955.0 | 113,756.40 USD |
| 90% Bad Luck | 90th | 95.0 years | 4,723,632.2 | 377,890.58 USD |
| 95% Extreme Drought | 95th | 123.6 years | 6,145,587.2 | 491,646.97 USD |

## Hardware Benchmark Profile

- Device: Bitmain Antminer S21 XP Hydro
- Slug: bitmain-antminer-s21-xp-hydro
- Architecture: ASIC
- Algorithm: SHA-256
- Hashrate: 473.00 TH/s
- Power: 5,676 W
- Efficiency: 12.00 J/TH
- Market Cost: 6,400 / 6,735 / 8,127 USD

## Blockchain Network Overview

- Blockchain: Bitcoin (BTC)
- Consensus: SHA-256
- Network Hashrate: 1089.78 EH/s (1.089781e+21 H/s)
- Difficulty: 140,577,680M
- Block Time: 564.7 seconds
- Block Reward: 3.1400 BTC (approx 259,574.38 USD)
- Spot Price: 82,667.0000 USD
- Cost of Production (Flagship): 49,089.65 USD (Bitmain Antminer S23 XP Hyd)

## Tracked Solo Mining Pools

Solo pools for Bitcoin (BTC) routing 100% of block rewards to the miner address:

| Pool Name | Fee | Link | Low Hashrate |
| --- | --- | --- | --- |
| web.public-pool.io | 0% | [web.public-pool.io](https://web.public-pool.io) | No |
| pool.solomining.de | 0% | [pool.solomining.de](https://pool.solomining.de) | No |
| solo.mineshop.eu | 0% | [solo.mineshop.eu](https://solo.mineshop.eu) | No |
| grandpool.io | 0.01% | [grandpool.io](https://grandpool.io/pools/bitcoin) | No |
| luckymonster.pro | 0.5% | [luckymonster.pro](https://luckymonster.pro) | No |
| kano.is | 0.5% | [kano.is](https://kano.is) | No |
| zsolo.bid | 1% | [zsolo.bid](https://zsolo.bid) | No |
| parasite.space | 1% | [parasite.space](https://parasite.space) | No |
| millpools.cc | 1% | [millpools.cc](https://millpools.cc/btc-pool) | No |
| mining-dutch.nl | 1.5% | [mining-dutch.nl](https://www.mining-dutch.nl/pools/bitcoin.php) | No |

## Machine-Readable JSON Summary

```json
{
  "coin_id": "Bitcoin",
  "coin_name": "Bitcoin",
  "ticker": "BTC",
  "algorithm": "SHA-256",
  "hardware_name": "Bitmain Antminer S21 XP Hydro",
  "hardware_slug": "bitmain-antminer-s21-xp-hydro",
  "hardware_type": "ASIC",
  "miner_hashrate_h_s": 473000000000000.0,
  "power_watts": 5676.0,
  "efficiency": "12.00 J/TH",
  "network_hashrate_h_s": 1.0897810260135576e+21,
  "difficulty": "140,577,680M",
  "block_time_seconds": 564.732,
  "block_reward_coins": 3.14,
  "spot_price_usd": 82667.0,
  "single_block_value_usd": 259574.38,
  "mean_time_to_block_seconds": 1301129425.7562122,
  "daily_block_probability": 6.64016428396641e-05,
  "monthly_block_probability": 0.0019901324808268006,
  "yearly_block_probability": 0.02396224050380502,
  "expected_blocks_per_year": 0.024254005309009768,
  "daily_gross_usd": 17.23673755127425,
  "daily_kwh": 136.224,
  "breakeven_electricity_usd_per_kwh": 0.1265323111292742,
  "hardware_price_usd": {
    "min": 6400.0,
    "median": 6735.0,
    "max": 8127.0
  },
  "retrieved_utc": "2026-10-21T18:57:14Z"
}
```

## Provenance & Integration Links

- Retrieved: 2026-10-21T18:57:14Z
- Canonical HTML page: https://backpow.com/Bitcoin/bitmain-antminer-s21-xp-hydro
- Coin datasheet: https://backpow.com/Bitcoin.md
- Hardware datasheet: https://backpow.com/hardware/bitmain-antminer-s21-xp-hydro.md
- Solo pools directory: https://backpow.com/solo-pools.md
- Live queries over MCP: https://mcp.backpow.com/mcp (tools `calculate_solo_mining_odds`, `get_hardware_benchmarks`)
- Licence: CC BY 4.0 — https://backpow.com/llms.txt