The watts are constant. The amps will vary - are you plugging it into 120-125vac (unadvised by manufacturer)

Are you plugging it into 208vac or 240vac in the USA?

Or somewhere else at even another voltage range, such as Europe?

So nobody talks amps, it is too relative.

Take the watts that it draws - it's been said to be anywhere from 2500-3000 watts and divide that by the voltage you will be using to power it with. Those are the amps @ that voltage range.

3000 watts / 240vac = 12.5 amps
3000 watts / 208vac = 14.42 amps
3000 watts / 120vac = 25 amps - and the manufacturer says that it will not be possible for the miner to run at 100% on 120vac.

Am interested in the SP30, is it still for sale? Probably needs to be priced appropriately at or less than what the SP31 is coming for in a month, but i haven't given it a lot of thought about what the exact price would be. Pricing it in terms of BTC might keep things relative since that's what it hopefully creates.

4.5THs produces about .09 BTC/day at current difficulty, i.e. for another week and then we go lower. That reality juxtaposed against current miner asking pricing is a sobering thought.