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Kia e-Niro 2 LR, Seat Mii
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The wireless relay only makes\breaks the low ampage feed to the circuit breaker in the Rolec. Same as switching the rolec manually.
You sure about that? For the reasons explained above, it's not healthy. It should be droppping the signal to the car that says power is available, then after a short delay it can trigger the breaker when there's no current flowing.
The breaker is for protection in an emergency, and not rated for breaking its rated current hundreds of times like a regular on-off switch.
 

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Kia e-Niro 2 LR, Seat Mii
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It's much more likely that the keyswitch does a low level change of signal on the CP line that tells the car to stop charging.

It's not clear whether the Shelly 1 uses an electromagnetic relay or a semiconductor device to do the switching. A semiconductor device might be safe to switch off as it will disconnect at a current zero crossing. The spec sheet and instruction sheet say nothing about maximum number of on/off cycles or what the switching element is.
In any case, if the Shelly is really designed and rated for repeated switching of a 3.5kW load it ought to work switching power to the EVSE, but it still strikes me as a rather crude way to do it.

Edited to add: I hope you only have a 16A charger because that's all the Shelly is rated for. Really don't try it on 32A!
 
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