Alright, so hear me out before i get completely bashed
*ahem* Rampdog *ahem*http://en.wikipedia.org/wiki/Tesla_Model_S
97 Equivalent MPG highway, and during a ZPAW you will not be traveling at speeds even close to highway cruising speeds. Due to road debris and idle cars, you will be lucky to hit 25, so imagine the distance you could make on a single charge. Also, a single charge gets you 230 to 320, depending on the battery type at highway speeds, which we've established are obsolete. You can easily add another 50 miles to your distance...
Other electric cars on the market ask hours of charge time to re-energize. The Tesla only asks you to wait 30 minutes for it to re-charge 200 miles of energy. Supercharger stations are popping up all over the country, but you could easily make your own adapter for your car in the ZPAW.
Electric cars travel quieter than their gasoline cousins, making them good for going unnoticed. Tesla safety ratings are 5 star in every category, making it quite safe in unexpected turn of events.
Two incidents have been reported recently of Tesla's striking road debris and the impact to the undercarriage, starting fires. I would advise raising your shocks, so your car doesn't turn into a flamethrower mid-ZPAW. All issues though have centered around high-speed impacts, and as stated, you will not be reaching high speeds.
Being electric, you wouldn't have to scavenge for gasoline, instead, you could quite simply utilize green energy producers (Solar panels, Wind turbines, etc.) that you would already have anyways in a ZPAW.
Need you more convincing?