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Why wasn’t it fully expanded right away and the other half added later? You can also feed in without a meter. Why should there be a storage added?

I assume he wants to take advantage of the new subsidy. I joke that we are adding a battery, another wallbox, and covering the north side. That we could cash in on that.

Why wasn't it fully expanded right away and the other half added later? You can also feed in without a meter. Why is a storage system supposed to come?

That was initially a matter of finances. Yes, but my electrician risks his approval from the supplier. Since KFW is now sponsoring.

I assume he wants to use the new subsidy. I jokingly say that we’ll add an extra battery, another wallbox, and cover the north side. That we could cash in on that.

Yes, the KFW makes it a bit cheaper. If we are among the 50,000 lucky ones. Fortunately, I still have some space in the south. And didn’t build all at once.

Hi,

I know people often complain about storage, but we have had ours in operation for 3 weeks now and I have to say, it is definitely worth it for us.

Sorry for jumping in with a question here, but you also mentioned storage and electric cars:

How can the battery of an electric car actually be integrated into the storage concept? At least some cars (e.g. Hyundai Ioniq 5) can also supply power. For the Hyundai, I believe it’s a maximum of 3.6 kW. We are just starting to think about leasing something like this, and then it would be interesting to use the 50-75 kWh battery in the carport instead of having 5-10 kWh in the basement?!?

I need the battery overnight, and the car will definitely be parked outside then.

Best regards,

Andreas

Hello Maybe you should ask such questions in a photovoltaic forum.

The German industry is working on the topic of bidirectional charging. Unfortunately, so far unsuccessfully in creating a guideline. Let alone the hardware for it.

Your idea only makes sense if you feed the electricity from your own photovoltaic system into the car. But usually the car is then just sitting at work.

Hi,

sorry for jumping in with a question here, but you also mention storage and e-car:

How can you actually integrate the e-car battery into the storage concept? At least some cars (e.g. Hyundai Ioniq 5) can also supply power. With the Hyundai, I believe a max of 3.6 kW. We are just starting to consider leasing something like that, and then it would be interesting to use the 50-75 kWh battery in the carport instead of putting 5-10 kWh in the basement?!?

I need the battery overnight anyway, since the car definitely stands outside in front of the house.

Best regards,

Andreas

We have considered our e-car purely as a consumer. I hope bidirectional charging will come eventually. Our car can do that too, but as far as I know, our house cannot. If you ask yourself about using the car purely as storage and discharging it at night, you naturally have to check whether the state of charge in the morning is still enough to get to work and back. We currently discharge 12-16 kWh in the evening/night. Different family, different values, but that is already a good chunk of most e-car batteries. Furthermore, for us both pay off, because most of the time (also in moderate weather) we currently charge both. Our e-car only charges AC single-phase, so it can currently only take 3.6 kW of the >8 kW that come from the roof at peak times. The rest then goes into the battery, otherwise we would give it away to the utility company. :) Even with battery AND e-car, we currently suffer mostly from the "problem" of not being able to store enough and still giving away too much at feed-in tariff. =) We are not commuters, and no matter how much surplus the photovoltaics deliver we can't even pump that much into the car. In winter, I can say more about how this relates to heat pump load times.