Home financing ever possible? Probably not!

If the fast breeder reactors of the Fourth Generation are meant, none of them has ever reached commercially productive status.

Allow bidirectional charging at the same time and you instantly have a huge decentralized electricity storage available, which can be drawn on at night and filled with photovoltaics during the day.

In theory, yes. In practice, this requires that most cars are also connected to the grid during the day, and that’s where we have the problem. The typical commuter car is parked somewhere in the industrial area or company parking garage during the day. There might be 4 wallboxes in the corner there. In order for the majority of cars to be charged during the day, they would have to be equipped accordingly, and people would have to be willing to participate (keyword battery wear or the fear of it). We also established a few pages ago that an e-car is best not charged externally, because it is expensive. So we would also have to bill dynamic prices here to make it worthwhile. The question is also what delta between charging and discharging would be realistic and whether people would be willing to do it for that. Honestly, I see other technologies like redox flow batteries at the grid level more.

We established a few pages back that it's best not to charge an electric car from external sources because it's expensive.

Of course, different billing models are needed if you make your high-voltage battery available as a grid-supporting storage. And of course, this storage must then also be integrated at bidirectional grid points. But basically, Vehicle-to-Grid already has potential.

In theory, yes. In practice, this assumes that most cars are connected to the grid during the day, and that's where we have the problem. The typical commuter car is parked somewhere in an industrial area or company parking garage during the day. There might then be about 4 charging stations in the corner. To charge the large majority of cars during the day, you would have to equip these areas accordingly and people would also have to be willing to participate (keyword battery degradation or the fear of it). A few pages ago, we also concluded that an electric car is best not charged by others, because it’s expensive. So we would have to implement dynamic pricing here as well, so that it pays off. The question also is what delta between charging and discharging would be realistic, and whether people would be willing to do it. Honestly, I see other technologies like redox flow batteries at the grid level as more promising.

Then just do it with the vehicles where it works and where people are willing to do it. In the industrial area and on the company parking lot (parking garage) there could be enough charging options if the employer is enticed with photovoltaics. Many people work from home, there are retirees, unemployed people, people on parental leave... For most of them, the cars are parked at home during the day. Permission for that would be a step in the right direction.

In connection with bidirectional charging, I recently read an article (which I unfortunately can no longer find) about discharging photovoltaic power storage in combination with smart meters. If I remember correctly, it was about a storage system that was fully charged the day before but was suddenly drained in the morning. It was a photovoltaic system with a permanently installed power storage. Will it perhaps be possible in the future to oblige homeowners and battery storage owners to do this?

Then just do it with the vehicles where it works and the people are willing to do it. In the industrial area and in the company parking lot (parking garage) there could be enough charging options if you make photovoltaic appealing to the employer.

What you are saying is nothing other than that the employer should invest a lot of money to equip parking spaces with charging points that are used in a grid-friendly manner. For the people who actually need to charge, the 4 columns at the entrance are enough. If we talk about great models, we also have to talk about who pays for it and why. If I personally install a wallbox and charge in a grid-supportive way for my home network, that is great. But no employer will spend 2000-3000€ per parking space so that employees operate their heating from the car or feed it completely generically into the grid.

Of course, different billing models are needed if you provide your high-voltage battery as a grid-supportive storage. And of course, this storage must then also be integrated at bidirectional grid points. But basically, Vehicle-to-Grid already has potential.

Yes, you have to talk about billing models there. I am just skeptical that in the end there will really be a result that makes it attractive to make your car available as a battery for other people. At the low end, no one participates; at the high end, it is cheaper to realize the storage directly at the grid level. For stationary large-scale storage, other technologies than lithium-ion are simply more suitable.