This is a certified refurbished Bitmain Antminer Z15 Pro: the same hardware as the new unit, returned and rebuilt to working spec, then tested under load for at least 48 hours before we list it. If you're mining Zcash (ZEC) or Horizen (ZEN) on the Equihash algorithm and you want enterprise-tier hashrate without paying full retail, the refurbished Z15 Pro is the value play in this category.
Specs are identical to the new unit: 840 kSol/s of hashrate at 2,780W, giving you 3.31 J/kSol efficiency. That's the highest output and best efficiency of any Equihash miner Bitmain ships, and on a refurb price, the per-watt economics get even more attractive than they already are at MSRP.
Every refurbished unit we sell has been: opened and inspected component-by-component, repaired or replaced where needed, fully reflashed to current firmware, and run continuously for 48+ hours at rated hashrate before approval. You'll receive a unit that hashes within ±2% of factory spec or we don't ship it. Each refurb comes with our 30-day operational guarantee, if it fails to hold hashrate within that window, we replace it or refund.
Refurbished stock at The Miner Island moves quickly, we typically have a handful of Z15 Pros in inventory at any given time, not full pallets. Free DDP shipping over $5,000, 3% off when paying with Bitcoin. Message us on WhatsApp to confirm current refurb stock before ordering.
| Algorithm | Equihash |
|---|---|
| Hashrate | 840 kSol/s ±5% |
| Power Consumption | 2780 W ±10% |
| Efficiency | 3.31 J/kSol |
| Noise Level | 75 dB |
| Dimensions | 245 × 132 × 290 mm |
| Weight | 5.9 kg |
| Interface | RJ45 Ethernet 10/100M |
| Temprature | 5 – 40 °C |
| Humidity | 10 – 90% (non-condensing) |
Every order over $5,000 ships DDP-paid from our Hong Kong warehouse, so duties, taxes, and customs clearance are paid before the unit reaches you. You won't get a surprise invoice from the courier on delivery day.
Most orders dispatch within 24 to 72 hours of payment confirmation. Transit time runs 3 to 7 business days to North America, Europe, and the major mining jurisdictions. We share the tracking number the moment the airwaybill is issued.
Every unit carries a 60-day warranty from the date you receive it. Manufacturer warranties (typically 180 to 365 days depending on the brand) run in parallel and we'll help you process those claims directly with Bitmain, MicroBT, Canaan, Goldshell, IceRiver, or Elphapex.
If your unit arrives dead-on-arrival (won't power on, fails the initial hashrate test, or has visible transit damage), we replace it. Document the issue within 72 hours of delivery (a short video or photo set is enough), and we'll ship the replacement.
We accept Bitcoin, Ethereum, Litecoin, USDT, USDC, and a handful of other major cryptos through Plisio. Pay in any crypto and save 3% on your entire order. The discount applies automatically at checkout. For bulk orders over $25,000, message us on WhatsApp to discuss 50/50 staged crypto payment options.
Live estimate based on this unit's hashrate, efficiency, and coin price.
Network difficulty, coin price, and uptime all move. Treat this as a sanity-check, not a guarantee. Baseline issuance data is calibrated to May 2026; numbers drift as networks evolve. We're happy to walk through your specific power cost and target hashrate on WhatsApp.
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