ᐅ 2. Is it worthwhile to have a separate meter for the heat pump? According to the calculations, yes—but is that really the case?

Hello, I am currently looking into the possibility of installing a second meter for our heat pump. About us: the house is 5 years old, KfW "42" standard, 150 square meters (1,615 square feet), photovoltaic system, air-to-water heat pump.

Attached is the calculation I have put together. Could this really be correct? What else should be taken into account?

This only applies as long as the price difference between the heat pump tariff and the standard tariff remains at the current level.
The heat pump primarily operates when there is little sunlight. For your energy provider, these tend to be the hours when electricity is more expensive to procure than during sunny periods. The procurement cost difference becomes even more pronounced with the addition of photovoltaic systems.
So, I wouldn’t be surprised if the difference between your two tariffs decreases in the future. In the worst case, it could even reverse.

Tx-25 schrieb:

What else should be considered?

That you have a very expensive rate for household electricity. "Poor" location in Germany? Because otherwise, the usual prices are significantly lower. My ex just signed up for under 25 cents.

nordanney schrieb:

You have a very expensive household electricity rate. "Bad" location in Germany? Otherwise, the usual prices are significantly lower. My ex just got a contract for under 25 cents per kilowatt-hour.

I live in Lower Saxony near the border to North Rhine-Westphalia.
So far, I have always signed electricity contracts with a bonus. Of course, the bonus also results in a higher price per kilowatt-hour. The bonus for this contract is 250 € (approx. 270 USD). However, I will choose contracts with bonuses again in the future.

Do these meters also need to be replaced periodically? What would happen if we get a new heat pump? Our current heat pump is 5 years old. In the worst-case scenario, I assume I will have to replace the heating system in 5 years. We have an Elco aerotop Split 07m heat pump, which is oversized. Despite adjusting all settings to the minimum level, it still cycles on and off very frequently. During the new construction, I relied too much on the plumber for this.

Tx-25 schrieb:

So far, I have always signed electricity contracts that include a bonus. The bonus, of course, also results in a higher price per kilowatt-hour. The bonus for this contract is 250 € (about 270 USD). However, I will also choose contracts with bonuses next time.

You have to factor in the bonus to make a proper comparison. Is there a bonus for the heat pump electricity as well? Without that, you’re already at 29.1 cents per kilowatt-hour if I include the basic fee.

Tx-25 schrieb:

Do these kinds of meters also have to be replaced periodically?

Of course.

Tx-25 schrieb:

What would happen if we get a new heat pump?

Nothing, except that you would get a new heat pump.