Photovoltaic system / heat pump, do you have 2 meters?

9.99kWp system 8kWh storage capacity for the start. 8kW charge-discharge power (so far hardly anyone looks at this value, yet many storage systems cannot even supply an induction hob from the battery) Plenty of interfaces for intelligent control of important consumers.

We have similar capacities with our system. Our storage is from BYD. You can also expand it individually later if you want. I think we will also do without a meter and run all the power through one. In summer we will take stock.

An emergency solution is a strange term - there is no emergency here. We produce hot water with self-generated energy during the sunny months - financially it is (still) quite balanced and I have a good feeling about it and enjoy using my own electricity myself first.

Heating rods are the last resort because they are the most inefficient form of photovoltaic power use. Therefore, "emergency" is exactly the right word, e.g. in island scenarios where the photovoltaic yield would otherwise have no use.
Why someone would want to use a heating rod instead of the existing heat pump is quite peculiar.

Compare the rates online. At verivox there is also a heat pump electricity comparison. I pay 19 cents and 6€ basic charge per month. one mME costs 20€ per year.

that varies a lot regionally.

we also have only one meter with heat pump and photovoltaic.

this varies greatly by region. we also have only one meter with a heat pump and photovoltaic.

That's correct, although the price for the mME is capped nationwide at €20 per year. That is the objectified additional cost caused by the second meter. The heat pump electricity tariff from our local supplier is more expensive than my household electricity, which I found through a price comparison ... so the comparison is worthwhile. Because, as mentioned, some comparison portals can now also compare heat pump tariffs.

Why one would want to use a heating element instead of the existing heat pump is quite peculiar

If you need a functionally rational argument: The heat pump wears out with switching operations. No switching operations during the sun period promises a significant extension of the service life. Not financially rational: Here we basically only have coal power – balancing groups or not – I want to use as little of that dirt as possible. Better to use inefficient solar power than efficient coal power.

With the heat pump, you triple the efficiency of the photovoltaic electricity. Of course, you don't want cycling; for that, there are modulating pumps, minimum running times/hysteresis. The storage also smooths out, it is very smart according to the manufacturer, you can certainly make something out of that and leave the immersion heater in the museum.