Went on a 4 day bike/hike and stayed in a cabin in cashton wi. My fat tire 21ah 48v was fully charged but I didn’t try all three tunnels just 3 then 2 and back since the last one would have pushed it to 65 miles there and back to the car. The next day we did tunnel one from Kendall wi. Perrot state park and castle mound then two days at wildcat mt hiking only.Drove 700 miles overall now the caddy has 2400 miles