Mitsubishi PHEV keeps flipping breaker. Landlord insists this is normal. Am I wrong?

We recently bought a Mitsubishi Outlander PHEV and have been trying to charge it using the Level 1 cable (120V, 12a) on an external outlet (120V, 15a capacity).

Only problem, is the breaker keeps tripping.

As far as we can tell nothing else is plugged in to that circuit.

The landlord insists that the wiring is fine but that normal plugs can't handle electric vehicles, especially since the house is old (it isn't, it was built in 1980 and recently renovated). He's confirmed that the plug can handle 15a, that the car should only pull 12a, but somehow this isn't adding up. He's also said that if we keep plugging it in there's a fire risk, but that apparently the wiring is fine.

We've also had issues with our stove flipping breakers if the oven and a range surface are on at the same time, which is decidedly not normal.

Is this normal? It sounds like nonsense to me, but I'm not an electrician, and I'd like to get a second opinion before we start exploring our options to get him to fix the wiring.