Around 2200 for new under warranty maybe closer to 2k for older.

I have powered a s9 with the bitmain psu in USA on 120 volt outlet. According to watt meter was pulling 12.5amp and 1510 watts. S9 was hashing fine at 13.7th and good temp. However I would imagine that was pushing the psu pretty hard, but it did run ok for 2 weeks.