When available, this miner ships from supplier stock in Hong Kong to South African delivery addresses. We confirm availability during order processing. Allow 1–2 business days processing after verified payment plus 5–8 business days for delivery (6–10 business days total). Prices include VAT and import duties. Check the description for condition, warranty and power/cooling requirements. Contact dave@dcmining.co.za before ordering if included accessories or requirements are unclear.
MINER RETURNS AND WARRANTY Notify us within 7 calendar days after delivery for a change-of-mind return. Return the miner by arrangement to Dawin, 63 Wilson Street, Fairlands, Johannesburg, Gauteng, 2170, South Africa. You pay lawful direct domestic return freight; no overseas return is required for change of mind. Conditions and statutory exceptions are in our Refund and Return Policy.
No additional voluntary Dawin commercial miner warranty is included. Your order is covered by the terms agreed when you bought it. Your statutory rights still apply. Manufacturer coverage is offer-specific. Your statutory rights under South African law, including the Consumer Protection Act where applicable, remain unaffected. Contact Dawin before returning faulty or defective goods. Dawin bears return costs where required by law. Do not send a miner overseas without prior written arrangements. See our Miner Warranty and Repair Information.
Description
Product condition and availability
The BITMAIN Antminer S21 Immersion 239 TH/s is a SHA-256 ASIC miner for compatible Bitcoin (BTC), Bitcoin Cash (BCH) and Bitcoin SV (BSV) mining pools. This listing is for the 239 TH/s Normal Energy Mode configuration. Condition: Brand new.
A compatible dielectric-liquid immersion cooling system is required and is not included in the miner price. Confirm a suitable installation before ordering.
Available to order from Hong Kong supplier stock; not held locally in South Africa. We confirm supplier stock during order processing. If we cannot supply your miner from Hong Kong or meet the stated delivery estimate, we will contact you before dispatch with the available options, including cancellation and a refund for an unfulfilled order.
293 × 236 × 364 mm, including the 44 mm handle; 17.15 kg
Inlet oil requirements
30–55°C; flow 1.0 m³/h
Figures shown are for Normal Energy Mode. Higher-energy operation has different electrical and cooling demands and is not the advertised performance of this 239 TH/s offer. Actual performance depends on operating conditions.
Mining results and installation
This miner requires a compatible immersion tank, manufacturer-specified dielectric cooling liquid, circulation and heat-rejection equipment. The external cooling installation is not included. Contact Dawin for consultation so that suitable equipment can be specified and quoted separately before ordering the miner. Cooling systems cannot be ordered directly on this website.
Operate only in a suitable dielectric-liquid immersion installation. Do not operate this immersion miner in air or immerse it in water. Have qualified installers assess the three-phase electrical supply, circuit protection, cabling, cooling-liquid suitability, flow and heat rejection for the actual installation. Follow BITMAIN’s exact S21 Immersion user guide.
The 3,824 W figure is for the miner. External pumps and cooling equipment add power consumption and cost. Mining profitability and returns are not guaranteed; results depend on cryptocurrency prices, network difficulty, electricity and cooling costs, pool fees, uptime and operating conditions. Configure your own mining-pool account and payout details.
Package contents and required equipment
One BITMAIN Antminer S21 Immersion 239 TH/s miner.
Power supply: Included in the selling price.
Power cables: Not included. Compatible power cables must be purchased separately and matched to the supplied unit and three-phase installation.
External immersion cooling system: Required, not included; consultation, specification and separate quotation are needed.
Package inclusions are separate from warranty coverage. Confirm any additional accessories you require before purchase.
Dispatch, delivery and price
Dispatch location: Hong Kong. Allow 1–2 business days processing after verified payment plus 5–8 business days delivery, 6–10 business days in total. Delivery is to South African addresses only. See our Shipping Policy.
Displayed product prices include VAT and import duties. South African delivery costs R270 for orders below R2,500 and is free from R2,500. Applicable delivery charges are shown at checkout.
Manufacturer warranty and Dawin support
BITMAIN’s S21 Immersion user guide describes a 365-day warranty starting from BITMAIN’s shipping date for new machines, limited to the original purchaser buying directly from BITMAIN. Its terms state that warranty responsibility passes to the reseller on resale.
This is general manufacturer information, not confirmation of cover for the supplied reseller unit. Its manufacturer or supplier eligibility, shipment history, remaining duration, South African claim arrangements and freight responsibilities have not been verified. No fresh 365-day period from Dawin’s sale, shipment or delivery is promised. Unverified coverage does not mean confirmed absence of coverage.
If verified manufacturer or supplier cover is included, its terms will be disclosed on the product listing or in your written quotation before purchase, including who provides it, its duration, what is covered, how to claim, repair arrangements and freight responsibilities. Dawin does not include an additional voluntary commercial miner warranty. Earlier agreed rights remain unaffected. Read our Miner Warranty and Repair Information. Contact dave@dcmining.co.za for support.
Statutory rights and returns
Your rights under South African law, including the Consumer Protection Act where applicable, apply independently of any manufacturer or supplier warranty. Statutory faulty-goods claims may be brought directly to Dawin. Dawin bears statutory return costs where required by law.
Notify us within 7 calendar days after delivery for a change-of-mind return. These miner returns are arranged to Dawin, 63 Wilson Street, Fairlands, Johannesburg, Gauteng, 2170, South Africa. You pay lawful direct domestic return freight; no overseas shipment is required for a change-of-mind return. Conditions and statutory exceptions are explained in our Refund and Return Policy. Statutory rights are not conditional on unopened packaging.
Contact Dawin before returning faulty or defective goods so that the appropriate remedy and return arrangements can be confirmed. Optional paid repairs and freight require an itemised quotation and your agreement. Do not send a miner overseas without prior written arrangements. None of this limits your statutory rights or earlier agreed rights.
