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

Created on: 11 Aug 2020 07:54
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annab377
Hello everyone,
I am planning a 15 kWp photovoltaic system for our single-family house and garage. Currently, without an energy storage system, since according to the latest information, it is still not economically viable. It is often advised against for that reason. Does this apply only to normal household use, or would it be different if you have an electric car?
I have a relatively long commute of 80–90 km (50–56 miles), so I’m considering leasing an electric car.
For that, of course, I would need a wallbox (as the interface between the energy storage system and the car) and an energy storage system. It does sound interesting because I could save a few thousand euros on diesel, and energy storage systems and electric cars are currently subsidized as well.
What additional costs should I expect? According to ADAC, a wallbox with 11 kW charging capacity costs about 500 EUR (e.g., HEIDELBERG Wallbox Home Eco). Accordingly, I would also need an energy storage system with a somewhat larger capacity. With an electric car (e.g., VW ID.3, but no Tesla), the payback period should be significantly shorter, right?
Let me know what you think.
Best regards
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annab377
12 Aug 2020 07:43
Yes, nobody really understands the politics in this regard (as is unfortunately the case with many other issues, often disconnected from the citizens).

Is there still a decision pending on this? The 52 GW cap was officially lifted a few months ago. Are the photovoltaic supporters still waiting for something?

Next year, the tax on self-consumption is supposed to be removed, right? Anything else?
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pffreestyler
12 Aug 2020 11:12
Is the frequently recommended LAN cable actually mandatory? In our case, it no longer fit through the conduit, and drilling an additional hole afterward didn’t seem reasonable to me. Could this lead to significant disadvantages? I might have to try my luck with a repeater then.
Musketier12 Aug 2020 11:21
The question is how much energy will be supplied via the charging station (wallbox) in the long term, and how much comes through the car itself. I just recently received a plug-in hybrid as a company car. With it, I can control charging, climate control, and departure times directly through the car’s app.
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Bookstar
12 Aug 2020 11:33
You don’t need this 99% of the time. You can always control everything through the car. But usually, you don’t actually control anything there. It’s set once and that’s it. Besides, Wi-Fi usually works anyway.
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nordanney
12 Aug 2020 11:42
pffreestyler schrieb:

Is the often recommended Ethernet cable actually mandatory?
No.
Musketier12 Aug 2020 12:26
In my opinion, it only becomes truly interesting when you have two electric cars and cannot charge them both at the same time, or when electricity no longer has a fixed price but can be charged cheaply during surplus periods, or when the sun is shining directly on your own photovoltaic system, or when the car serves as an in-house storage unit. In these cases, the current control system in the car may no longer be sufficient.

However, much of this is still futuristic, and by then there will likely be the next or even the following generation of Wi-Fi, with control logic continuing to evolve.