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frank_gayer27 May 2017 20:18Hello,
since our street is currently being renovated and we plan to start building in the next six months, we need to determine which electrical connection we should have installed, as we have to specify this now.
Unfortunately, we do not yet have final details from our builder, but experienced home builders or professionals will surely know what is appropriate.
We are planning a single-family house with 2 floors plus a basement (total living area 270 sqm (2906 sq ft)), continuous underfloor heating, an air-to-water heat pump, and a Wallbox for charging electric vehicles (3-phase).
Can the correct connection size be determined based on this information? We have assumed a 25 kW capacity with 3x 63 A.
Thank you for your feedback!
since our street is currently being renovated and we plan to start building in the next six months, we need to determine which electrical connection we should have installed, as we have to specify this now.
Unfortunately, we do not yet have final details from our builder, but experienced home builders or professionals will surely know what is appropriate.
We are planning a single-family house with 2 floors plus a basement (total living area 270 sqm (2906 sq ft)), continuous underfloor heating, an air-to-water heat pump, and a Wallbox for charging electric vehicles (3-phase).
Can the correct connection size be determined based on this information? We have assumed a 25 kW capacity with 3x 63 A.
Thank you for your feedback!
F
frank_gayer30 May 2017 06:38Hello,
Were my details too imprecise?
Were my details too imprecise?
Hello,
this question doesn’t really arise. The standard for our utility company (and probably most others) is a house connection protected by three 50 Amp fuses. The upstream infrastructure usually doesn’t allow for more. At least that was the case for us.
That roughly corresponds to about 20 kW. This is enough to charge your Tesla with a 400 V 32 A outlet while still leaving 7.2 kW available for the house. You then have to choose whether to run the heat pump or use the stove in the kitchen, as using both at the same time could almost be tight.
Best regards,
Andreas
this question doesn’t really arise. The standard for our utility company (and probably most others) is a house connection protected by three 50 Amp fuses. The upstream infrastructure usually doesn’t allow for more. At least that was the case for us.
That roughly corresponds to about 20 kW. This is enough to charge your Tesla with a 400 V 32 A outlet while still leaving 7.2 kW available for the house. You then have to choose whether to run the heat pump or use the stove in the kitchen, as using both at the same time could almost be tight.
Best regards,
Andreas
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frank_gayer30 May 2017 11:40Hello,
I don’t quite understand your statement. The standard would be three times 50 amperes, but if that’s not enough, then it’s not really a standard, is it?
What capacity would then be appropriate, or how much should be reserved? As mentioned, three times 63 amperes were offered, so that capacity does exist.
I don’t quite understand your statement. The standard would be three times 50 amperes, but if that’s not enough, then it’s not really a standard, is it?
What capacity would then be appropriate, or how much should be reserved? As mentioned, three times 63 amperes were offered, so that capacity does exist.
Hi,
I may not have been clear enough.
Here in Schwabach, a 3x50 A supply is the standard; you won’t get more, neither for money nor for good arguments. Simply because the grid infrastructure can’t support it anymore. (By the way, this is a widespread problem that is often overlooked in the e-car hype.) If your utility company offers 3x63 A as the standard, you probably won’t get more either, or only for an exorbitant additional cost.
However, 3x63 A is sufficient to charge an electric car with a 400 V / 32 A socket while simultaneously running your heat pump and your cooktop.
More than that won’t be possible, so forget about charging two cars at the same time.
Best regards,
Andreas
I may not have been clear enough.
Here in Schwabach, a 3x50 A supply is the standard; you won’t get more, neither for money nor for good arguments. Simply because the grid infrastructure can’t support it anymore. (By the way, this is a widespread problem that is often overlooked in the e-car hype.) If your utility company offers 3x63 A as the standard, you probably won’t get more either, or only for an exorbitant additional cost.
However, 3x63 A is sufficient to charge an electric car with a 400 V / 32 A socket while simultaneously running your heat pump and your cooktop.
More than that won’t be possible, so forget about charging two cars at the same time.
Best regards,
Andreas
For us, the 3*50 A supply is sufficient for now because we don’t have a heat pump but an old-fashioned gas heating system. An electric car is also not planned in the near future. (Before that, I’d rather have a Dodge RAM as a family vehicle! :cool
If, in 10–15 years, someone comes up with proper batteries for electric cars, I’ll definitely reconsider. At the moment, it’s all just a bit of a gimmick, but that will surely change. The first cars with gasoline engines were also dismissed as nonsense...
Back to the topic:
Have you already talked to your utility provider to see if you can even get a connection with more than 3*63 A?
Best regards,
Andreas
If, in 10–15 years, someone comes up with proper batteries for electric cars, I’ll definitely reconsider. At the moment, it’s all just a bit of a gimmick, but that will surely change. The first cars with gasoline engines were also dismissed as nonsense...
Back to the topic:
Have you already talked to your utility provider to see if you can even get a connection with more than 3*63 A?
Best regards,
Andreas
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