Unlock bidirectional charging (V2L)

In the Chinese version, the smart #1 can also release energy again. Just as you know it from the Hyundai Ioniq 5 and the Kia EV6. Using a type 2 plug in the charging socket, which then has a Schuko socket. Then you can plug in whatever you want with up to 16 A on one phase with AC 230 V.

The European version of the smart #1 doesn't seem to get that. At least it isn't mentioned anywhere anymore (?) and I couldn't find it anywhere in the press release either.

The hardware, i.e. the charger, should be the same in Europe and Asia. Both the 7.2 kW charger and the 22 kW charger. I can hardly imagine that there will be two variants.

Now the question is: Can it be unlocked? I've made this thread here and I'm curious to see if anything else comes up. Maybe one of you has an idea why one -apparently deliberately- does without this feature in Europa.

Okay. Today I did some research on how Hyundai and the Kia solved the problem. They have totally simple type 2 adapters, which you can be build yourself. If you want that.

In terms of content, they simply have a type 2 plug, which has a 75 ohm resistor between PE and PP. Based on the resistance, the car recognizes that it is not a normal type 2 connector, but the V2L adapter. And if you also connect 75 ohms between CP and PE, then the car started the V2L process and supplies voltage to the socket.

That's how it electrically works:

     Schuko socket         Typ 2 plug

      L o------------------------------o L1

      N o------------------------------o N

     PE o--------o---------------------o PE
                 |    ___
                 '---|___|---o---------o PP
                    75 Ohm   |
                             |    \
                             '--o  \o--o CP
                               on / off

Source 1 & Source 2

You can also build it yourself easily. I hope that smart will do something similar. Build it yourself would also make it possible, for example, to put a power strip on it. So, for example, you can operate three small things at the same time. Instead of just one. Incidentally, in the Chinese press releases, smart speaks of 3.3 kW. However, voltage and current are not named.

Besides that:

What kind of voltage and frequency the car outputs is not controlled with the resistors or anything. That's determend tricly by the car's region. So while a German car does 50 Hz with 230 V, an American car provides 120 V and 60 Hz.

There is also a circuit board in the adapter from Kia and Hyundai. But it is only responsible for the indicator LED on the adapter. So not mandatory. It is often left out when DIY building an adapter, since the vehicle inside shows anyway that it is in V2L mode.

And here we have how it seems to work on the MG4.

     Schuko socket         Typ 2 plug

      L o------------------------------o L1

      N o------------------------------o N

     PE o--------o-----------o---------o PE
                 |           |
                 |           '---------o PP
                 |    ___
                 '---|___|-------------o CP
                     480 Ohm

So a different resistance and even simpler than the Ioniq 5. I have to see if a reader from China can tell me the resistance of the smart adapter between PE and CP, like PP and PE.

I still have a loose type 2 plug here. I have now ordered an adjustable resistor and switch. Maybe I get a reaction from the smart when I play around with the resistance.