If no watts are shown and only amps are shown, multiply the volts (input AC) by the amps to find the watts.For example, Volts(AC input) x Amps(amperage) = Watts (Wattage) 110V x 0.5A = 55W wouldn't it be 250 x 6 amps = 1500 watts
but here in north america it is half the volts & double the amps. it has to be on it's own fuse/breaker in the fuse/breaker panel of 15amps