Originally Posted by Jebby
Assuming they're right next to each other....Couldn't just just run an extension cable from a 220v outlet in your laundry room to your garage?
You're thinking about voltage, not amperes. Your Laundry is a NEMA 14-30, an electric range is NEMA 14-50. So you're looking for an electric range or RV outlet.
That said, 50A is typically half the breaker box, the only thing that might take up more is a forced-air electric furnance (typically 60A.) So if you have an electric furnance, electric range, electric water heater, and laundry you'd need a second breaker panel which means you'd need to upgrade from 100A to 200A service
if you don't already have it, and if you already have 200A service or underground service and need more, you're SOL. Electric Laundry+Stove+Furnace+boiler = 180A at most. So add an electric car on top and you'd need 400A service.
On the other hand, if you have gas heat/boiler/stove/furnance, then you probably have sufficient power in a 100A service. If you're really worried, charge the car at night, do the laundry during the day.