Today I rode 54.5 km's on 15% of my battery with 411 metres of climbing. So extrapolated that's over 300 km's on my internal battery and would be almost 3,000 metres of climbing.
I put a kit on my Lightning P38 recumbent, as it is my ride of choice, with 17,500 miles on it.
I got a 500 watt geared hub motor on the back with an 11 amp hr battery, 36 volt system. I have 5 assist levels. On flat ground,
8 mph to 28 mph with me pedaling and putting out my max of 100 watts. I have 500 miles on the kit. No suspension on the bike, so I bought a red Vision recumbent with full suspension, that I plan to move the kit to this winter...then I can float over the potholes and not worry about bumpy roads!