ᐅ Are home battery storage systems for electric vehicles also not cost-effective? Costs of charging station and battery storage

I don’t get it either. What’s the point of having a photovoltaic system if I don’t use the electricity myself? With the current low feed-in tariffs, it makes the most sense to consume the power on site.

Nida35a schrieb:

A friend who is an electrician advised us, and since there is no gas line in the house, it was built with the future in mind. Photovoltaics and an electric car could still be added.

Having it is obviously better than needing it.
When the photovoltaic system is installed, the grid operator only notices the portion that is fed back into the grid. If an electric car is connected, the photovoltaic generation is practically unnoticeable. Of course, this no longer applies with 30kW photovoltaic output and a 3.7kW charging capacity of a plug-in hybrid.
For a battery electric vehicle (BEV), you realistically need up to 11kW charging capacity. There are a few models that can charge at AC 22kW. Of course, that is a current technical limit, which may change in the future, but 11kW charging capacity is more than enough to fully charge a BEV overnight, even if you drive an eTron or Tesla.

Our grid operator anyway provides 30kW, which was already included in the connection fee, and the electrician also justified it at least approximately in the grid connection application (noting large consumers), so we were approved and secured for that (3x63A).
Realistically, a normal household never exceeds 10kW. You would have to turn on all the cooktops and ovens. You only exceed that with a heat pump—and even then, only if it has an electric heating element that kicks in. I have never exceeded 10kW myself, even with a heat pump.

Bookstar schrieb:

No, why would that be? How do you come to that assumption? It usually isn’t worthwhile and means a high investment. Better to use a green electricity provider, I pay 25 cents all in, and you can’t produce electricity that cheaply with photovoltaic!

As always, nonsense from you on this topic. The reality looks quite different. Levelized cost of electricity here is about 6 cents per kWh, plus around 4 cents VAT on self-consumption. After 5 years, even those disappear.

My quiet hope and plan is moving towards photovoltaic systems, using the car as a buffer battery, air source heat pumps, and an HPS system for hydrogen/electricity storage throughout the year. There is a lot of research being done, and the car should already be able to charge back, but at the moment everything is still too expensive.

annab377 schrieb:

So if you install a wall box at home, it should always be compatible with photovoltaic systems.

Well, actually, almost every wall box is compatible with photovoltaic. When the sun is shining, you use the solar power generated, as it is not fed back into the grid.

guckuck2 schrieb:

As always, nonsense from you on this topic. The reality is quite different. Production costs here are about 6 cents per kWh, plus approximately 4 cents VAT on self-consumption. After 5 years, these also no longer apply.

Your reality... I can draw electricity for free until the photovoltaic investment is paid off, so I couldn’t care less about that calculation...

Then you have not understood the principle of investment and return. That’s okay, but please refrain from commenting on these topics if you are not informed.