Bitmain will be releasing S15 and T15 on 8/11/2018

[digital$]

it's pretty much safe to assume that anything above 240v will put the psu in danger, i also wouldn't take bitmain support word's very seriously.

if you have a constant >240 voltage then that will be an issue, but if you are only worried about once in a while spikes then you can use something like this > https://www.aliexpress.com/item/60A-220V-adjustable-automatic-reconnect-over-voltage-and-under-voltage-protection-device-relay-with-Voltmeter-voltage/32814064058.html

it's more or less a voltage protector, it does not regulate voltage whatsoever, but it does close the circuit when voltage is higher than whatever you set it to, same goes for voltage drop, i use something very similar to this "not on miners but on a sensitive fridge"  and it works like magic.

thanks for info/tip...

[minefarmbuy]

T15s look available for now.

[Steamtyme]

hmm set it to 239 or 240 or 241

I'll have to head out to the garage tonight and check out the circuits I have out there, as that's where these would be installed. For my concern though I don't think the settings will help me if I'm consistently over Voltage. Those settings would be great for a stabilizer, at say 239 to keep it under their apparent hardcap for voltage. I am more concerned of the constant power cycling this device brings if I am indeed consistently over 240, sure I don't burn out the PSU by going over voltage, but flipping the switch on and off over and over again isn't going to help the equipment either.

To big a gamble for that bit improvement in efficiency until I know more. When I know I can run an M10 without worry, it's still the better option for me atm. I say this knowing that there is an S15 that I could grab in Canada for a decent price.

[mikeywith]

Not sure how are you going to make certain, voltage can change a bit depending on the time of the day, based on a few factors, so when you test it, it may be 238v but that doesn't mean it's not going to go any higher 3 hours later.

The easiest and cheapest way to test this to be 100% sure that everything will work as you want them to be would buy installing the voltage protector and using 1 of the miners you have (s9 or anything else), set the voltage peak to say 239 ,then watch the hashrate graph on the pool after say 24-48 hours, if you get a lot of V shapes then diffidently S15 is not for you  

* there are other ways , but i do think this is the easiest and the cheapest and requires 0 skills.

[Steamtyme]

Well at this point I'm saying the 15 series is not for me.

I did just do the manual checks on the unused summer circuit I have in the garage. The plan was to test it a few times throughout the day  as I went in and out while working on the house.

First test was 242-244V. Same results consistently for the next hour and a half. That's all I needed to see for now.

[mikeywith]

First test was 242-244V. Same results consistently for the next hour and a half. That's all I needed to see for now.

this is bad news, let's hope bitmain will revert to the old psu specs for the future batches.

[philipma1957]

this is bad news, let's hope bitmain will revert to the old psu specs for the future batches.

well remember only 1 person  has had confirmed psu death at 243-247 volts

I would love to know if someone else has had this happen.

[Steamtyme]

True. Honestly if I had not heard their story I would already have an S15, or an order for a couple T15's.

I'm just not prepared to be the guinea pig. This would really sink my hardware upgrades to have a failure without warranty protection. The email request I sent for clarification has gone unanswered so far; which was expected.

[ConnerM]

well remember only 1 person  has had confirmed psu death at 243-247 volts

I would love to know if someone else has had this happen.

That was me. I tried 2 units at home back in January on separate 30amp 240v circuits, one in my basement and one in my garage. These are circuits I ran S9's on all last winter. Both S15's PSU's failed or fault tripped resulting in no power at slightly above 240v. My multimeter tests those circuits around 240.8v on average but they can vary +/- a couple of volts. One S15 failed almost immediately, within an hour, and the other ran for around 10 hours before crapping out. Both PSU's were noticeably hot prior to failure. I suspect the basement unit failed first due to the ambient (around 60f) being warmer so it over heated more quickly. The garage unit ran longer (ambient around 25f). Both units were returned to Bitmain CA under warranty repair tickets and were replaced directly from China in about a week.

We currently have 43 S15's running at the commercial farm on 208v, some for nearly 2 months, without any failures or issues though we did get one unit that had a bad hash board. Bitmain also replaced that unit under warranty in about a week.

I would not attempt to run anymore units at close to 240v without a step down transformer. Other than that, they have turned out to be fine gear. I have no complaints. They are all 28th/s units. Collective average for 43 units is 1.2Ph, so all machines are running very close to spec at 208v and 50-60f ambient mining room temp. Curious to see how well they hold up a couple of months from now once our mining room starts to get hot. We do intend to switch them into LP mode once the ambient starts getting into the 90's and mine them like that during the course of the summer.

One note - all 3 of our warranty replacement units seem to have come out of China stock and do not have the power rail covers, they are the open rail design. All other units we received have the rail covers.

[philipma1957]

I have a t15 on order and I should be safe up in clifton,nj  to run the s15 or the t15

but warranty of gear is critical for mining.

I am no longer tiny garage miner I have 530th + 40th = 570th  For BTC and I have 7.6 gh for LTC

But I did get a bad m10 I got parts today and now will go back to clifton to see if it is repairable.

The m10 was about 890 usd and right now it is hashing under 2th vs 31th

I got about 30 usd in earnings which is a net down of 860 plus I purchased 398 in various parts for the other six machines.

so that is 1258 in the hole or about 1 s15

when you buy the newer gear  and it goes down it is costly.

my share of the coins earned the last 2 weeks was 660 usd no cost for the power  but 1 good unit going down set me back
1 full month .   and even if I fix that m10  and the loss drops to 400 in spare parts it is an 8 day set back.

So for me to buy  3 or 4 s17's or s15's   it is a tough choice.

@ connerM that makes it easy for me to get some s15 or s17 as we are running at 228 volts in clifton

[minefarmbuy]

Gets to a point were an extra unit could circumvent the loss as there is no way to recoup time but then spare parts are essential for these machines anyway.

[TeslaWatt.com]

We got about 270 x S15 miners and we run them at 208v and 240v without single issue so far.

More S15 miners are coming our way. We are in Nevada so you can visit us anytime if someone wants to check in person. We are very transparent. Although this was March batch.

Also there are 2 models
S15 - 28 THs
S15 - 27 THs.

They are about the same in power consumption little bit lower.

[philipma1957]

We got about 270 x S15 miners and we run them at 208v and 240v without single issue so far.

More S15 miners are coming our way. We are in Nevada so you can visit us anytime if someone wants to check in person. We are very transparent. Although this was March batch.

Also there are 2 models
S15 - 28 THs
S15 - 27 THs.

They are about the same in power consumption little bit lower.

Nice website.

Maybe I would send some s15s.

[madmartyk]

Got my S15 in last week, 2 dead hash boards, off to CA for repair.  Anyone have any idea on the turn around time?

[sarcheer]

Got my S15 in last week, 2 dead hash boards, off to CA for repair.  Anyone have any idea on the turn around time?

I think the guy who had a couple PSU's die said it was a week turnaround from China.

[madmartyk]

I think the guy who had a couple PSU's die said it was a week turnaround from China.

Mine went to California.

[sarcheer]

Mine went to California.

[...]

Both units were returned to Bitmain CA under warranty repair tickets and were replaced directly from China in about a week.

We currently have 43 S15's running at the commercial farm on 208v, some for nearly 2 months, without any failures or issues though we did get one unit that had a bad hash board. Bitmain also replaced that unit under warranty in about a week.

One note - all 3 of our warranty replacement units seem to have come out of China stock and do not have the power rail covers, they are the open rail design. All other units we received have the rail covers.

[...]

Found the user and one of the posts I was referencing above ^.

[philipma1957]

I got a shipping notice for my t15.
I think it will come on Tues the 26th

It was supposed to be shipped April 1-April 10

I made these 3 post yesterday they were deleted this morning. Not angry in the least they were pulled as I feel that my gear was shipped because I posted these yesterday. Since gear is now on the way and shipped early these posts don't have to stay.  I do wonder has anyone esle had there gear shipped yesterday?

To be clear I realize I should have posted these in this thread not Hagss review thread.
I do wonder if  bitmain read them and decided to ship some gear out yesterday.

Mine are expiring and I never had an in stock s15 to use them on.

That is what I purchased 1x  T15.

Oh I finally decided to do the kyc  I photoed my NJ driver's License and they accepted it for KYC.

I would like to get the T15 early. would be nice.

[madmartyk]

I also received a shipping notice on my T15.  Should be here Mon or Tues.  Hope I have better luck than with the S15.  Comes in 2 bad hash boards, send it to CA, Bitmain send me a older (looked used) unit and it had a bad hash board.  So it's off to the repair center.

Then I start getting E-Mails that my coupons are ready to expire, use them now..  Problem is there is nothing to by with them!!  Everything is out of stock!!

[minefarmbuy]

Yea, bitmain is sending units out.