Air-water heat pump current consumption and data

Simply increase the hot water temperature when there is enough photovoltaic power, as far as the heat pump can manage without the heating element, for me max 55* C. Then you have a reserve...

Certainly installed hot water circulation and 46 is too low, go to 48 with 6k hysteresis and deactivate the circulation and only let it run once for 15 minutes before you get up.

just don't

Because it is unnecessary and efficiency decreases the more heating is required, you don't have sun every day. Because with circulation you lose almost 2-3 degrees of heat per hour, without it only about 3 degrees in 10 hours. And in my opinion it is unnecessary, since we try to consume as little electricity as possible without losing comfort.

Above all, how do you want to regulate that? Today you have yield from photovoltaics, tomorrow you don't.

You are of course right about the circulation, I didn’t install any at all in my place. It’s pointless in a small single-family house with short distances. Regarding the control: I’m at home every day anyway and watch the weather report, so you can quickly turn up the hot water temperature if the sun is forecast. And when I’m on vacation (last time in autumn ’19!!!) nothing is consumed anyway. For me, the whole thing is mostly a toy (in my opinion, photovoltaics still don’t pay off nowadays) but I don’t like being taken for a ride by any grid operators. Feeding in brings about 12 cents per kWh, while consumption costs well over 20. So I try to use as much as possible of the electricity generated by the toy in the house: 1. direct consumption for general electricity, 2. charging the battery, 3. heating up the hot water, 4. raising the underfloor heating during the day as far as it makes sense. This works wonderfully on sunny winter and spring days. The underfloor heating is a huge heat storage. Only what absolutely must is fed in. Mostly from mid/end of March to the end of October, when you simply can’t consume it yourself (unless you happen to have an electric forklift without forks in the garage) :):)

It was about the significant heat loss when showering or that the buffer sometimes runs empty, I gave him a few suggestions about what it could be. That it is not like that for you because you have no circulation and have [Photovoltaik], be happy.

what's the point of it all in the end? the 2-3 weeks a year when the conditions prevail don't even yield a small cheese pizza with a soft drink as savings.

in the months of december, january, and february, you usually have over 80% of the annual consumption. a hot water load currently requires about 1.3 kwh for us, we usually have two of those in 24h, whether I get it from the roof or from the socket, it really doesn't matter at all.