I would get an electricity monitor that you can plug into your outlet and plug whatever you need it into it to monitor electricity usage per outlet.
Then I would measure each outlet at a time and see if any seems unusually high, of course you have no base lines to compare them to.
Additionally, if you have WiFi router, check to make sure that no one is connected to it besides you and your family and that there is a secure password on the WiFi connection, probably best to change it. Having others connected to it can dramatically increase power consumption.
If you have any devices like a Roku, Smart TV, etc., check that they don't have auto update turned on, it can increase power consumption to continually check for updates. Additionally, check for updates manually on all of your devices, including computers.
I would also check your refrigerator and make sure that it is running as it should and that no one has adjusted the temperature on it, same goes for any additional freezers and such you might have. Also, look to make sure the quantity of food in these is about the same as normal, too little and too much food can both cause them to use more power.
Is your Water Heater gas or electric? If it is electric, have it inspected as well.
Is your oven/stove electric? If so, check it to make sure that it isn't consuming a lot of electricity even when off.
If you have an area of the house you don't use very often, such as a basement or attic space, make sure no one has left lights on in these locations, it can make a big difference, especially since they are more likely to still have older, less energy efficient light bulbs.
The list goes on and on, but you get the idea, I seriously doubt it is your car, unless something is malfunctioning with your EVSE.