Winnebago investing heavily in Electric powertrains

A Prius for example has a 121 HP, 1.8 liter gas engine for when the battery can't keep up. Trying to use a small engine to recharge a much larger battery bank is going to require many hours of generator time to provide a short driving time. If you were to boondock for a week with a lot of solar, supplemented with several hours a day of genny time you could recharge a sizable battery bank. But who would want to spend the amount of money that this rig would cost to be limited by its characteristics?