Not for long, depends on a lot of factors and battery age. Lots of leaf folks are unhappy at how fast the batteries have lost their ability to hold a charge.
I also worry about other things. Have you ever pulled a flashlight or gadget out of a drawer, unused for months, and discovered a caustic mess inside? What happens if your car sits around unused for a long time? Will the batteries out-vent toxic gas chemicals that combine with water vapor, thereby destroying the car and surrounding garage? I know old gasoline can cause problems after sitting for decades, but what about months for batteries?
I think that's a key issue. Batteries just can't be trusted over time. Properly cared for they decline at a sort of predictable rate but drain them too much and all bets are off. At least with an 18 gallon gas tank you basically know how far you'll go today, tomorrow and 5 years from now.