CleanSpark to buy Antminer S21 Bitcoin mining rigs totaling 4.4 EH/s

The American mining company CleanSpark will acquire the recently unveiled Bitmain Antminer S21 mining rigs with a total hashrate of 4.4 EH/s.

We’ve purchased 4.4 exahashes per second (EH/s) of the recently announced Antminer S21 #bitcoin mining machines.

The most efficient machines to ever hit the market are expected to start arriving in January 2024. Once deployed, $CLSK‘s fleet is expected to average 23.5 joules per… pic.twitter.com/hraCn1NTUo

— CleanSpark Inc. (@CleanSpark_Inc) October 11, 2023

Equipment deliveries are expected to begin in January 2024. The firm noted that the deal was struck on favorable terms. They include seller financing of 20% of the total purchase price ($12.35 million or $2.8 per TH/s). The loan repayment term will be 365 days after the transfer of the devices.

CleanSpark expects that once all miners are deployed, the company’s hashrate will exceed 20 EH/s.

“The S21’s efficiency should not only increase our capacity but also reduce electricity costs per bitcoin mined […] As a result, we expect to finance most of the purchase through operating cash flows,” said CleanSpark CEO Zach Bradford.

The energy efficiency of the new Bitmain miner is 17.5 J/TH, nearly 20% lower than the S19 XP.

By deploying the new batch of equipment, the company aims to improve the fleet’s overall energy efficiency from 28.4 J/TH to 23.5 J/TH — a 17.25% improvement.

Based on the stated financing figures, the deal is worth $61.75 million, with devices costing CleanSpark $14 per TH/s.

In early October, Australian bitcoin miner Iris Energy announced the purchase from Bitmain of 7,000 units of Antminer S21 for $19.6 million — also at $14 per TH/s. The Chinese manufacturer provided the firm with a one-year payment deferral of $2.9 million.

According to Hashrate Index, market quotes for devices with an energy-efficiency rating below 25 J/TH stand at $15.95 per TH/s at the time of writing.

Earlier, media reported about Bitmain’s failure to pay part of employees’ salaries in September.