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Author Topic: APW7 and Z11  (Read 285 times)
baladio16000
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March 22, 2019, 04:54:32 AM
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Bitmain recommends the APW7 power supply for the Antminer Z11, but with 110v it only supplies 800-1000w, which is significantly less than what the Z11 takes, at 1418w.  Am I missing something?
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philipma1957
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March 22, 2019, 05:19:41 AM
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Bitmain recommends the APW7 power supply for the Antminer Z11, but with 110v it only supplies 800-1000w, which is significantly less than what the Z11 takes, at 1418w.  Am I missing something?

Don’t mine with a 110volt circuit.

Or use two units plugged into separate circuits. If you insist on using 110volt.


If you use two psus be careful to wire the z11 correctly.

Or boom 💥

I see BTC as the super highway and alt coins as taxis and trucks needed to move transactions.
fanatic26_
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March 22, 2019, 09:19:49 PM
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You are missing the fact that all mining power supplies in this space expect 220v

You really should look into installing some220 if you plan on mining. 110v just isnt the way to go.
baladio16000
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March 26, 2019, 06:43:49 AM
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I mine in my garage in the U.S., and have been for months on 120v, since the miners are only 620 w each, or less.
lunobird
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March 26, 2019, 06:46:38 AM
 #5

I mine in my garage in the U.S., and have been for months on 120v, since the miners are only 620 w each, or less.

You get a 2 percent efficiency bump if you use 240 volt over 120 volt for the same amount of power being used.   In this bear market every amount of efficiency counts and getting creative with cooling cost matters.

baladio16000
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April 02, 2019, 07:28:44 AM
 #6

I can't install anything permanent regarding 240v.  All I see are step-up transformers.  Are those going to lose significant efficiency?  Can anyone recommend a transformer that plugs into a 120v, 20 amp circuit, that doesn't lose more than, say, 1% efficiency?
yodann
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June 03, 2019, 01:12:46 PM
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how about APW3++? will it be any effect in hashing speed or rejection?
baladio16000
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June 11, 2019, 08:32:17 AM
 #8

APW3++ only does part of the Z11 miner on 120v.  I'm using two power supplies.  An expert said it's not really worth it to use a transformer, unless you have this really big, expensive one, and even those top out at 2% efficiency loss.
roc-noc
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June 30, 2019, 09:34:41 PM
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APW3++ only does part of the Z11 miner on 120v.  I'm using two power supplies.  An expert said it's not really worth it to use a transformer, unless you have this really big, expensive one, and even those top out at 2% efficiency loss.

Not sure what country you operate from. My experience is in the USA but all 110-120v countries should be similar.

Skip the transformer.  Hire an electrician to install 240 volt circuits.  Your power panel should have a 240 volt main breaker.  Homes in the US typically have 100 amps, 200 amps, or 400 amps of 240v at the main panel.  The main breaker turns off all the power to your house.

Commercial buildings usually have much more power. 

An electrician should be able to peel one or more 240 volt circuits from your panel and wire outlets to where you need them.

Figure out the amps you need for your miners and be sure to apply the 80% derating rule for continuous use (required by code).  For example, a 30 amp breaker can only run 24 amps on a continuous load.

Good luck.
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