used old BITMAIN AntMiner S11 20.5T 16nm BTC SHA-256 Miner Better Than T9 S9 S9j S15 T15 Z9 Mini WhatsMiner M10 M3 Avalon 921
ID: 12604

used old BITMAIN AntMiner S11 20.5T 16nm BTC SHA-256 Miner Better Than T9 S9 S9j S15 T15 Z9 Mini WhatsMiner M10 M3 Avalon 921

0.0 (6 votes) | 7 orders
Price: US $1318.59 / piece
Discount Price:
US $1146.60 / piece



Product Description


1. Hash Rate: 20.5T ±2%(Standard Mode)
                       16T-17.5T  ±2%(Low Power Consumption Mode)
2. Power Consumption: 1435W ± 5%
                                      1024w-1120w  ± 5  %
(at the wall, 93% efficiency, 25C ambient temp)
3. Power Efficiency: 70 J/TH ±7%(at the wall, 93% efficiency, 25°C ambient temp)
4. Rated Voltage: 11.60 ~13.00V
5. Dimensions: 238mm(L)*175.4mm(W)*278.8mm(H)
6. Cooling: 2 x 12038 fan
7. Operating Temperature: 0 °C to 40 °C
8. Network Connection: Ethernet 



Shipping list:


1.Antminer S11 20.5T   (old )                              1 PC                       used only 90% new  



Product Displaying:




The price of mining machines often varies according to such variables as the exchange rate, phantom currency prices, and network difficulty. Does not accept refund requests or returns.



After-sale service:

1. Due to special merchandise, no refunds or returns are accepted after delivery


2. Due to market fluctuations, product prices may be adjusted at any time after your purchase. We do not assume the obligation of prior notice and price compensation.


3. Used machine We guarantee power and power parameters, but the appearance is not guaranteed. Please consider before buying.




warranty service:


1. 90 days from the date of shipment


2. If it is a warranty policy, a defective miner can repair it for free; after the warranty period, the machine needs to pay for repairs according to the actual situation.


3. The following events will invalidate the warranty: Customer first removes/replaces any component by itself; damage caused by lightning or voltage surges; scorched parts on a stray board or chip; miners/circuit boards/components infiltrate due to wet conditions Or corrosion and damage.


4. Pay shipping fees when shipping replacement parts during the warranty period


5. If you have any questions when receiving the package, please communicate with customer service.


shipment :
1. Free shipping default DHL
2. About value declaration:
1KG--2KG -------15USD
8KG ---20KG-------------50USD
< 20KG---------------------100USD
3.Special requirements, please contact the customer.





  • Brand Name: kuangcheng
  • Model Number: s11
  • Products Status: Stock


We are proud to offer international shipping services that currently operate in over 200 countries and islands world wide. Nothing means more to us than bringing our customers great value and service. We will continue to grow to meet the needs of all our customers, delivering a service beyond all expectation anywhere in the world.

How do you ship packages?

Packages from our warehouse in China will be shipped by ePacket or EMS depending on the weight and size of the product. Packages shipped from our US warehouse are shipped through USPS.

Do you ship worldwide?

Yes. We provide free shipping to over 200 countries around the world. However, there are some location we are unable to ship to. If you happen to be located in one of those countries we will contact you.

What about customs?

We are not responsible for any custom fees once the items have shipped. By purchasing our products, you consent that one or more packages may be shipped to you and may get custom fees when they arrive to your country.

How long does shipping take?

Shipping time varies by location. These are our estimates:

Location *Estimated Shipping Time
United States 10-30 Business days
Canada, Europe 10-30 Business days
Australia, New Zealand 10-30 Business days
Central & South America 15-30 Business days
*This doesn’t include our 2-5 day processing time.

Do you provide tracking information?

Yes, you will receive an email once your order ships that contains your tracking information.

My tracking says “no information available at the moment”.

For some shipping companies, it takes 2-5 business days for the tracking information to update on the system.

Will my items be sent in one package?

For logistical reasons, items in the same purchase will sometimes be sent in separate packages, even if you've specified combined shipping.

If you have any other questions, please contact us and we will do our best to help you out.


Order cancellation

All orders can be cancelled until they are shipped. If your order has been paid and you need to make a change or cancel an order, you must contact us within 12 hours. Once the packaging and shipping process has started, it can no longer be cancelled.


Your satisfaction is our #1 priority. Therefore, if you’d like a refund you can request one no matter the reason.

If you did not receive the product within the guaranteed time(60 days not including 2-5 day processing) you can request a refund or a reshipment.

If you received the wrong item you can request a refund or a reshipment.

If you do not want the product you’ve receive you may request a refund but you must return the item at your expense and the item must be unused.

  • Your order did not arrive due to factors within your control (i.e. providing the wrong shipping address)
  • Your order did not arrive due to exceptional circumstances outside the control of CNTRONIC Consumer Electronics Retailer (i.e. not cleared by customs, delayed by a natural disaster).
  • Other exceptional circumstances outside the control of

*You can submit refund requests within 15 days after the guaranteed period for delivery (60 days) has expired. You can do it by sending a message on Contact Us page

If you are approved for a refund, then your refund will be processed, and a credit will automatically be applied to your credit card or original method of payment, within 14 days.


If for any reason you would like to exchange your product, perhaps for a different size in clothing. You must contact us first and we will guide you through the steps.

Please do not send your purchase back to us unless we authorise you to do so.

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