Heat pump with heat pump tariff?

I think that a second meter is not worth it. I have one, here on site the heat pump tariffs are actually somewhat cheaper than the normal ones, but it's maybe around €80 savings per year, who knows if that will remain. The building is KfW70 with about 180sqm heated and 65sqm unheated (basement) area within the insulated building envelope. Consumption for heating + hot water with ground source heat pump under 2000kWh.

from on the go

We have already discussed the topic extensively several times. Just try using the forum search.

18.99 cents? Where and which provider? And +VAT or inclusive?

Including VAT.
Just go to Verivox.
There you can also compare heat pump electricity directly in the electricity comparison (the other major portal does not offer a comparison for heat pump electricity).
The provider I have is the only one that does not charge a basic fee (nor offers additional discounts).

Currently, they even offer 18.81 cents for new customers (not for existing customers). Other providers come to slightly cheaper prices including discounts.

No matter what I compare on verivox, I can't get below 21.9 cents! Vattenfall offers a heat pump tariff, for example, but it is not available in [bw]. Household electricity, however, is available.

Electricity prices are simply different regionally. Maybe this is already the explanation.

Yeah, with a Berlin postal code it's under 18.54 cents

But what does regional mean, I thought that's exactly why you should take advantage of the online provider comparison and switch.

I rather think they know where they can get the money from.