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

here is a good reason for storage (if it’s not too expensive). The car charges continuously with 3.5KW despite clouds and sun alternating constantly. The example is from today and a Mazda MX30 (which can only charge single-phase) that I gave to my daughter was charged ;-)

Hello,

I hope bidirectional will come eventually. Our car can do that too, but as far as I know, our house cannot.

The (former) engineering nation Germany.... In Japan and Korea, this is apparently all standard. But here... (I am currently filling out a registration for holiday care for my kids, and they actually prefer to have it by fax.... *Argh* )

I seem to have a conceptual or understanding problem. The inverters feed three-phase into the house grid, right? Otherwise, I can't get rid of power outputs of 10-20 kW at all, and also, single-phase feeding would create dreadful unbalanced loads on the grid.
And then the wallbox should be able to charge the car with 11 kW? The wallbox doesn't even notice whether the power is coming from the grid or from the roof, does it?!?

Or is your car really the problem, meaning it simply doesn't take more than 3.6 kW?

Many greetings,

Andreas

Or is your car really the problem, meaning it simply doesn't take more than 3.6 kW?

Yes, it's the car. We have the smallest model of the MG4, MY22, which charges AC only single-phase. The wallbox can of course do 11.
If the car could charge with 11 and be used as a storage, it would be an option for us.
My latest information was that this is not yet possible / not allowed in Germany. But I am unsure about that.

Morning,

The (former) engineering country Germany.... In Japan and Korea, this is probably all completely standard. But here... (I am just in the process of filling out a registration for holiday care for my kids, and they actually prefer it by fax.... *Argh*)

I seem to still have a thinking error or a problem understanding. The inverters feed into the house grid three-phase, right? Otherwise, I can’t get rid of power of 10-20 kW at all, and besides, feeding single-phase would cause terrible load imbalances on the grid.
And then the wallbox should be able to charge the car with 11 kW? The wallbox doesn’t get at all whether the electricity is coming from the grid or from the roof!?!

Or is your car really the problem, meaning it simply doesn’t take more than 3.6 kW?

Best regards,

Andreas

The WB ideally communicates with the inverter and “sees” exactly what is coming from the roof and can (optionally depending on the WB) feed only surplus, a mix of surplus and grid power, or in “fast mode” simply power from the grid (if available, of course also photovoltaic power) into the car. Many Japanese and of course other manufacturers who thought they had to save... ugh ... can only do single-phase (about 3.5 kW), but newer ones can also do 11 kW (all of course AC). DC smaller EVs can often do around 50 kW, larger ones up to (I believe) now up to 250 kW! But those are probably the 800 Volt cars.

Bidirectional WBs are already available for purchase in Germany as well. They can also be installed. Unfortunately, lawmakers do not allow it yet.

Does the warranty on the battery still apply if the vehicle is used as an energy storage system? VW, for example, already excludes the warranty if charging is done exclusively via DC. This is not a "proper use" of the battery...

Bidirectional charging is already possible, but it is not allowed. It is rather not desired. Let's put it that way.

The Hyundai Ioniq can already do that. VW wanted to introduce bidirectional charging for the ID 3 as of January 1, 2022.

I don’t even know what the problem is. It’s probably because of the resulting loss of tax revenue. It can’t be that you charge your car cheaply somewhere and then run your dishwasher with the electricity in the evening.

It would also be a solution to mitigate the dark doldrums. Theoretically, it would be the solution to switch to complete island operation. I wouldn’t need a public power connection anymore. The 70 - 80 kW in the car are easily enough for 2-3 days with normal consumption.

The bidirectional charging function from VW has been announced for a long time and is eagerly awaited – politics has removed obstacles for feeding electricity back into the grid with the Easter package. The large battery variants of ID.3, ID.4 and ID.5 with 77 kilowatt-hours capacity are technically already equipped and are supposed to be usable as home storage and theoretically even earn money for the customer.

That was 2021! Soon it will be 2024 and VW has put everything back again. Politically not desired.