Electric distance.
Man....that's a tough one. As far as the solar charge thing goes, I dunno. I can't even begin to answer that. My cart is a 48 volt system. I have 6 8volt batteries in it. Some 48 volt systems have 8 6volt batteries in them. The 8 series will last longer than the 6 battery set ups. It also depends upon how severe your hills are. I drive in SW Pa. where hills are HILLS. I had a set of front disc brakes (Jakes Brakes) installed on my cart so I could stop it in the middle of hills. Golf carts come from the factory with just rear drum brakes. These are fine for stopping on nice paved cart paths on golf courses, but on gas well roads 'n such.....not so much.
After a few times of my eyes buggin out and locking up the rear tires most of the way down a muddy or slippery hill, front brakes were a must.
Also, I had the regenerative charging system removed. The regenerative system on a golf cart is what you hear going down a hill that whines and kind of holds the cart back. This generates electric that re-charges the batteries. Nice on a golf course, but for a quiet ride in the woods......not so much.
Well, so far I haven't really answered your "how far" question. Well, on a flat or moderate hill terrain, you will get more than I do here in Pa. I get enough to make a day of getting where I want to go, and back several times, plus moving positions during the day. I honestly can't tell you the miles or even the yardage that I travel as I never kept track. I will tell you it takes about 6 hours to fully charge the batteries whether they are fully down or even half down.
I have toyed with the idea of getting a quiet generator should I need one....but honestly, I have yet to be in a position where I've ran out of battery power in a day. I've come close, but have not gotton stuck yet.
The best thing for you to do if your considering one is to map out your distance and just ask how far to the seller.
Dave