Got it! Let’s summarize and double-check the calculations step by step to make sure everything is clear and accurate.

Antminer Z15 Pro Mining Analysis

1️⃣ Mining Output

Hash rate: 840 KSol/s

Network hash rate: 13.67 GSol/s

Block reward: 1.5625 ZEC

Block time: 75 seconds

Daily ZEC mined ≈ 0.11 ZEC ✅ (matches your chart calculation)

2️⃣ Power Consumption

Miner power: 2780 W → 2.78 kWh per hour

Daily consumption: 2.78 kWh × 24 h = 66.72 kWh/day ✅

Electricity cost scenarios:

0.3 yuan/kWh → 66.72 × 0.3 ≈ 20.02 yuan/day

0.78 yuan/kWh → 66.72 × 0.78 ≈ 52.04 yuan/day

3️⃣ Daily Revenue (ZEC price 490–500 USD)

0.11 ZEC/day × 490–500 USD/ZEC ≈ 53.90–55 USD/day

Convert to yuan (≈7.15 CNY/USD) → 53.9 × 7.15 ≈ 385 yuan/day ✅

4️⃣ Daily Net Profit

At 0.3 yuan/kWh → 385 – 20 ≈ 365 yuan/day

At 0.78 yuan/kWh → 385 – 52 ≈ 304.96 yuan/day ✅

5️⃣ Payback Period

Miner cost: 4,999 USD ≈ 35,700 yuan

At 0.3 yuan/kWh → 35,700 ÷ 365 ≈ 98 days

At 0.78 yuan/kWh → 35,700 ÷ 304.96 ≈ 117 days ✅

✅ Summary

ParameterValueDaily ZEC mined0.11 ZECDaily electricity cost20.02 – 52.04 yuanDaily revenue385 yuanDaily net profit305 – 365 yuanPayback period98 – 117 days

Conclusion:

Even at a higher electricity cost of 0.78 yuan/kWh, this Antminer Z15 Pro pays for itself in less than 4 months, making it highly profitable under current ZEC prices.

If you want, I can also make a visual chart showing profit vs electricity cost and ZEC price, which makes it super easy to see how your payback period changes. Do you want me to do that?