Amo a Sam amat

#electrifyEverything I am buying a place at the end of a long (kilometres long) single phase line.
I want to use an instant hot water service because I have no real need to store heat in a hot water tank. It is almost all for showering. The showers are very much time-limited because of rainwater tanks and #Australian #climate. There is just no point to storing hot water if I only ever use a a tiny amount per day.

Because the input water temp will be about 5deg C, I want this thing:
https://www.stiebel-eltron.com.au/3-phase-electric-instant-hot-water-system

But it needs (of course, thermodynamics, I know) a *honking* great electrical connection, and it needs 3-phase.

We are probably going to have a large-ish solar panel setup, but I am wondering, do any of you have, experience with a 15kW battery - inverter - #3phase output unit? In a domestic situation.

I've heard of #AmberKinetic. Is that an/the answer?

3 Phase Electric Instantaneous Water Heater

German engineered instant hot water systems, hot water and hydronic heating heat pumps, heat recovery filtration ventilation systems, space heaters and water filters for Australian homes.

STIEBEL ELTRON
Sep 18, 2023 at 5:39amWeb
Show threadDale ReardonSep 18, 2023
@Heterokromia We had a similar single phase power problem at one house and went for instant hot water powered by gas in a cylinder rather than piped gas and the gas lasts a very long time
Show threadAmo a Sam amatSep 18, 2023

@dalereardon I have lived with that sort of setup. I agree it works well.

However, my partner has a deeply felt objection to gas (her childhood home is being fracked) and refuses all gas purchases. I can't say that I disagree. Buying hydrocarbon miners' products only encourages the buggers.

But but but - hot showers. Argh. The dilemma.

Show threadDavid PeningtonSep 19, 2023
@Heterokromia A heat pump hot water system works well with solar - set it to heat at noon, plus a second heat phase around 10pm and it uses 1-1.5 kwh per dsy, most of it when you have excess solar.
Show threadAmo a Sam amatSep 20, 2023
@DavidPenington Thanks! I am googling small ones now. They are mostly ENOURMOUS, I suppose because the heatpump bit is hard to scale down. hmmmm