Ed to the above: The Golden Circle could probably get by on a destination charger. Most people spend around half an hour at Gullfoss to see the falls (half of that walking), plus more if they eat there (which is common). The route is about 240km / 150mi (not counting any detours / side trips, and the weather could be bad). With our low speed limits, and a "top up" at Gullfoss, a baseline Model 3 would probably not cause too much range anxiety. The Ring Road, however, is a different matter. For locals, the most important route is probably Reykjavík-Akureyri, which is about 380km / 235mi, including two (gently-sloped) ridges (~400m and ~550m, respectively), the latter one passed over shortly before you reach your destination (the trip start and end are at sea level). I don't think most people would feel comfortable doing that trip in a Model 3 without a supercharge available halfway, particularly when the weather is bad on the ridges (which most definitely can happen). Destination charging at each end would be sufficient, rarely does a local do the Reykjavík / Akureyri route and then suddenly turn around and go back. For tourists, apart from the Golden Circle, the most important route is along the Ring Road to Vík (~185km/115mi each way, 370km/230mi round trip, with a 360m ridge on the Reykjavík end and a 110m ridge on the Vík end, but otherwise flat). Destination charging really doesn't cut it for this route, because tourists usually go to many different sites but usually only stay for 10-45 minutes at each. A supercharger at Vík would not only eliminate any range concerns, but would also enable anyone to have a destination further east, potentially putting place as far away as Djúpivogur in the Eastfjörds into range (and thus popular tourist locations like Skaftafell and Jökulsárlón on the way, both of which tourists often stay for hours at and would be great places for destination chargers). I'd say that two superchargers and several destination chargers could probably enable most of Iceland's long-distance transportation to be electrified. It would be an excellent start, at the very least; the rest of the Ring Road, and then side areas (Snæfellsnes, Vestfirðir, Northausturland), and ultimately the highlands could be addressed later. But the start can be minimal and still extremely useful.