The SP31's run on 110V, but the hash rate doesn't meet the specs advertised. That's why 240V or 264V is recommened.

If the price is right, I will commit to 4 units.

So far there's interest for at least 8 units:

me - 2
wpgdeez - 2
Powell  -2
Biffa - 2

192 more units to make a GB possible.

Let's see if there's more interest and we can pitch it to SP.