Bitcoin Forum

Hello community,

i have several Antminer S9's and a problem with my electricity which is voltage drops and the machines keep restarting. So my question is can i add a not so big UPS on each and every miner NOT to keep it running on power drop but to clear any peaks on the electricity

The amount of power S9s draw is too much for a standard home UPS. You would have to buy something large and expensive.

You are in a tough situation in the sense of ROI with this need for UPS system.  :-\

okay so what can i do to protect the machines ? circuit breakers? and also can i add extra net switches so i can somehow protect the control board from peaks on the LAN from the ISP?

You need a bigass online UPS.
But that is most likely going to hurt your profit.

Basic things for mining hardware:
-stable electricity
-stable internet
-appropriate cooling

Check out GE LanPro series for example and contact a professional electrician, find out price and other details.

Just like de'ja vu all over again... ;)
Please ref https://bitcointalk.org/index.php?topic=1888591.msg18761611#msg18761611 for my choice of UPS.
And yes they are big'uns.

you can add cheap offline UPS if the sole purpose is to clear the peaks and provide
at leats a couple of minutes of online time,just buy the cheapest ones
or you can use https://www.amazon.com/gp/product/B003Y24DEU for example
it won't be able to keep all five miners online but will provide surge protection and level the peaks

The cheap ones are honestly not worth it at all, if you're going to get a UPS get a good one that'll keep it up for as long as possible. The cheaper you go the lower the quality and the less time it adds. Also, we're talking about S9s and 865 watts won't keep it running for long.

If it runs at all. Even a halfway-decent UPS should shut down as soon as you exceed its rating.

yes,you are right,it won't hold for long
but the purpose is not to keep the miners online at all time and all costs,if I understood OP correctly-
he has unstable electricity so the blackouts are very short in time but happen pretty often
the cheap ones ( offline 600+ rating or so ) should be able to switch to the battery and back till the power is restored (2 minutes or less),the ROI on s9s is what he has to keep in mind
it would be only too easy to buy five 200$ 2000 rating online UPS and  sleep well
one of the main reasons s9's break down is the power failure though,blades and controllers are dying like flies
and one blade costs what 300$ if your warranty expired?
so make sure you weigh pros and cons when you decide how much you want to spend on UPS/surge protection

honestly your pretty stuck, a cheap UPS will need its battery's replaced pretty much every year, a good quality one may last 2-3 years. so its really not worth it. if its short brown out then a good quality PSU should be able to handle that as they have capacitors to fill short gaps and voltage dips and surges. S9 is about 1000watt which for a good UPS will cost about $1200 per miner, if it was DC then theres a few solutions but theres no cheap solutions for AC current that i know of

i guess if you where seriously desprate and it happend very often and you didnt care about wasting extra power you could do

wall socket  ---- 12vDC step-down convertor---- nice big 12vDC capacitors ---- 12v convertor then wire that in to the miners directly so you dont need the PSU anymore

its probably the best solution but have to run it through a couple of electricians first

Used Electric Free method. something like used cheap trick but installed expensive. And no worries without Main Electric Socket.

i used this trick. and no need UPS  ;D

Happy Mining + Green Consumption

care to elaborate what is this "Electric Free method" ?
green consumption is very good,but there is no such a thing as free electricity,well unless you are stealing or taking it from another source

no sir. example some generator used solar. and the with trick change with green/eco energy. My friend can do it. even he said 10 Antminer S9 can handle and without worries down.

That mean this method need some energy concept where you can change from Basic Energy to Low Consumption Energy :D

PS im not kidding i visit his place last time :D (if i come visit him again i wanna give shoot sample energy what i mean)

 I like APC UPS but their 1500 VA units will not handle even a SINGLE Antminer S9, T9, R4, or S7.

 900 or so max WATT rating (the 1500 VA capability is for use with older non-power-factor-corrected computer power supplies).

 It WOULD handle a single S5 comfortably, or a PAIR of them will handle a S9 if you are using 2 separate power supplies to power the S9 with.

 In the APC line, you'd have to go to at least one of their 2000 VA units (which do NOT come cheap unless you get them used with dead batteries) to handle even a SINGLE S9 running on a single PS.


 Nice thing about APC models - they ALL have current-limited charge circuits (going back to their ORIGINAL models decades back), so you can replace the small batteries they are designed for with car-type or deep cycle HIGH capacity batteries very easily - and a pair of good CAR batteries will commonly last 5-10 years on a APC 1500VA unit, while only costing commonly 2-3 times what that pair of 12V 7AH or 12V 12AH gel-cell batteries (depending on the specific APC 1500VA model) the units are designed for cost AND give a lot higher capacity and run time.


 There is no such thing as "level the peaks" outside of some ferro-resonant UPS designs - and those things tended to cause issues of their own outside of some fairly narrow specific design setups, as well as tending to be VERY large and heavy for comparable capacity.

And UPS's like the specific ones I linked to from Cyberpower. Price per-KVA about the same as CV transformers but more efficient. By the nature of an always on-line UPS still less efficient than stand-by UPS's but better than any CV transformer.

What you might be able to use, instead of a large expensive UPS, is an AVR, or automatic voltage regulator.

Not sure if you're running on 110V or 220V, but I know Tripp-Lite and APC make them (sometimes also called a "line conditioner").  I have an APC line conditioner I use on some home theater gear, and some cheaper no-name AVR's I use on other TVs around the house, since I also have trouble with low voltage conditions at times.

These don't use a battery, but rather a transformer with a variable tap.  So when the voltage drops (or increases) beyond a set point, you'll hear it click and it adjusts itself to either boost or reduce the voltage as-needed.

They're cheaper than a UPS and you can get large ones that could handle an S9.