sustainable

So, this is a general question for everyone. I'm curious how long the battery in a plug in car will last? Batteries are good for only so many charges and going from 0-100% is the worst thing to do for a Lion battery. So is a plug-in a useful product? I would imagine that they are used 0-100%...

I am planning a electric motorhome. anyone know any other project as this ? and I want put 15 solar panels on the roof, 5 fixed, more 5 on each of 2 sliding frames, when stationed I pull to aside, and wait a complete charge (about 8 hours) for bath water, I want put a solar heater: a solar...