[bluGill]

With the range of cargo ebikes it isn't hard to get off grid. Riding a century - 100 miles (200km) - is regular achievement for normal bikes - not e-bikes. Most ebikes only have a range of 40 miles, so just the ability to get 50 miles by charging while riding can be useful. If you go camping, solar puts a campground that if more than 20 miles from you in range: so long as you can recharge while at the campground for a few days you can get back home again.

Note that none of the above is about saving money. Other than indirectly because it lets you use a bike for trips that otherwise would require a car, and cars cost a lot more money to own. The above are also uses that I have for an ebike (I don't have one, but those are potential uses making me interested in one), and solar would help make it work out.

[_aavaa_]

Aren't those last 50km going to much more difficult since you're not having to carry the extra weight, and the extra resistance of the electric motor?

[bluGill]

Taking an ebike farther than the batteries range should be considered impossible. While it is possible to ride on a dead battery, the effort isn't worth it. Thus a regular bike has more range than an ebike.