At 40A it shouldn't be too bad according to my electrician, but it might jump the breaker.I noted that the 40A breaker makes your installation questionable. I am assuming you have a 32A charging station plugged in currently. If anyone plugs in a 40A charging station or an appliance with a NEMA 14-50 plug, there will be problems. I sure hope the wire is sized for NEMA 14-50. I hope you find my response constructive.
If we really need more than 40A then we will require to change the breaker to a 50A one, but so far no need.
The wire can support up to 55A.