Recharging an EV is the biggest problem with batteries, they take a long time to charge or you do significant damage to their over all lifespan. This is the simple reality of it, it has to do with some of the more basic laws of physics & electricity that I certainly will not be figuring out how to change.
So if I accept this I have options. Let's deal with a smaller battery than the one in someone's Tesla or Volt. We'll use my eBike battery because, it's what I'm most familiar with. The battery takes power in at a higher voltage than it puts out energy & it takes it in at 1.8 amps. That amperage is the controlling factor in how fast your battery charges. My battery is 500 watt hours & from "dead" (which is still more than 8% "juice" left in the battery) will take about 7 hours to charge. Now if I were to step the amperage up to 3.6 amps I'd charge the battery in about 4 hours, maybe less & doubling it again would cut the charging time to about 2 hours. Each time I charge it at double or quadruple the rate that's ideal it is as if it went though 2 or 4 charge cycles & I'd lose 40-150 miles of range off the end of my battery for each such charging. Now, let's focus on what matters about an individual battery in a system. We can use a single battery to get 36 volts or we can use 3, 4, 6, 10 or more depending on the voltage of each cell & how we array them. We can use 1 battery to get 20 amps of power to our machine or we can use several. That several is what is interesting me now. If we use several batteries then each can be charged at the same time. So we can either charge the battery 4 times faster than it wants or we could cut the battery in to quarters & charge each cell individually. The ability to charge multiple cells individually creates the potential for power generation as you ride to be a useful thing. It has been the reality of things that you simply ran energy out of the batteries far faster than it could possible be replaced. That 500 watt hour battery on my bike can easily be depleated in 2 hours of hard riding & might last for 4 hours of frugal use, but will take every minute of 7 hours to charge. Now we're talking about 4 cells that each could be charged in 2 hours & that works remarkably well.
This leaves us with the best ways to gather that much power in 2 hours. Solar is not quite there, wind has some potential but, there's the reality of no such thing as a perpetual motion machine & drag may outweigh any potential benefit to using the ample windpower available. The idea is that with me adding energy into the system perhaps I can make it a net win through overall efficiencies.
A small turbine seems sensible with an equally small set of generators, the issue is building such a system.