Quote from: mrpark on July 25, 2014, 05:50:54 PM

Quote from: jtoomim on July 25, 2014, 05:10:15 PM

My datacenter's hosting fees are probably comparable to or lower than your electricity prices. We'll be using >= 208V. We won't be ready to host for another two weeks, though.

In the SP10 firmware, there's an option to ignore or modify the power limit when running on 115V. You should only do this if you have a thicker-than-normal cable between the PSU and the wall (12 awg preferred, but 14 awg might be okay too).

OK, interesting, please send me the information and prices. Right now the SP10s are doing OK so far in Israel (fingers crossed), but just thinking about the day when its not worth the electricity anymore, then I would be running off 110v somewhere when forced to run at a negative cash flow. I think we have a total about about 10++ SP10s in various places, but they are all not mine.

I have a 14AWG wire, and 20amp dedicated outlet for each. By mistake one time I grabbed a 10amp cord, I was puzzled that even though the SP10 was pulling just 1000W, the cord was super hot. I guess not all chords are created equal. What does unlocking the voltage do to the heat. I have my fans set on 90% constant. How to do the voltage/option hack, in the GUI or only in the config file?

We're still working out the details on our prices for our DC. I think we're going to offer about $90/kW/month for month-to-month deals (zero commitment), with discounted rates if you pay in advance, down to maybe around $70/kW/month if you pay 12 months in advance. We should be releasing more information (and probably a video walkthrough of our facility-in-construction) next week. I expect us to be online around Aug 10th. For reference, $90/kW/month is about $0.12/kWh, and $70 is about $0.096/kWh. That includes cooling, rent, internet, electrical upgrades, etc., of course. We may also be offering a modest discount for Spondoolies miners because they're reliable and dense. Hosting 10 SP10s should be no sweat for us. Our first DC is scheduled to have about 800 kW of capacity online by late September.

Instructions on bypassing the 110V limit are below. Unlocking the current limit at low voltage will make the AC cable significantly hotter. Be careful; they shipped the miners with the default current limit for a good reason.

http://www.spondoolies-tech.com/blogs/technical-blog/14433873-version-1-4-2

Quote

If you create a file called /etc/mg_ignore_110_fcc the FW will not limit the 1100W for voltage under 130V. Note that this mode of work is not well tested by me, and can cause extreme heat in standard power cables and 110V sockets. Make sure you have 16 amper cables that match the amperage of the system. We take no responsibility of any damage done to the miner, PSU or your house if you set this flag without proper cables and sockets, and if the amperage of the PSU reaches higher then 14.5 amper. The PSU supports up to 14.5 Amper, so make the proper computation (and don't forget to add 15% to SP10 limit for PSU efficiency). If you are not sure - do not set this flag.

To create that file, you'll probably need to ssh in (download putty if you're on Windows) and run something like this:

touch /etc/mg_ignore_110_fcc

or possibly this:

sudo touch /etc/mg_ignore_110_fcc

I've burned out an electrical outlet before from running about 17 amps through one plug for several hours. Do be careful.