still confused p/v=amps 2500w/120v=20.83..i was under the impression a neptune was 2500 to 3000 watts? so in that case i'd need a 30amp circuit right? or is 2500w too high?
20A 120V will give you 2400W, but a 20A 240V circuit will provide for 4800W - which based on KNC's initial guesstimate will be enough safety and headroom for powering 1 Neptune. Even though a 120V 30A circuit might be enough wattage if it were me I'd rather go with the dual hot wiring of 240V when running a big load 24/7.