OK, guys, thanks a lot. Right now I have three antminers running. I tried a couple of things for running them: 1) a military 12v battery charger, and 2) Dell Poweredge 2950 power supply.

The Dell power supply is cheap only $12 with free shipping. It seems to work best, very easy to solder on proper connections. It can easily run two antminers.

It also accepts 110 and 220 volts without problems. The only minus is that it is loud, but I do not care too much, this being a warehouse.

I will be making "basic bitcoin mining rigs" comprised of two S1's, a Dell power supply in the middle, bolted together, and use them as my basic building block.

I will post updates once I get more of them running.