Forgot to address this part. Tesla’s high power home charger is 20kW (240V, 80A), so you’ll need a 20kW array to match that output, which is pretty big but not out of the question if you have a lot of acreage. Their commercial Supercharger stations, on the other hand, offer 120kW and if you installed that much solar capacity at home you might as well become a power plant and pay somebody to chauffeur you around on a sedan chair. You could feed them homegrown kale and soy to maintain the off-grid aspect. Or just get a horse.
In normal use, however, there’s no reason to really worry about charging time (especially for a 25-mile range) because you can just charge it slowly, overnight, from the solar energy you accrued in your batteries.