this post was submitted on 22 Nov 2023
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at my parents house the is a 14kw heat pump that does heating and water and it's not an industrial heat pump. you can get them from daikin, but they need three phase ac.
I would call anything that needs 3-phase to be "industrial". The number of residences with 3-phase would be in the low hundredths of a percent of homes.
3-phase 230V 16A is standard here. but you can get up to 30A if the wiring allows it. I've never seen a house with only 1 or 2-phase.
https://www.worldstandards.eu/electricity/three-phase-electric-power/
German 3-phase is at 400V, there is no such thing as 2-phase (you're probably thinking of split phase 110+110 as in NA). So I'd be practically certain your parents have single phase 230V.
between neutral it's 230V.Between two phases it's 400V.