Stevebills,
I have a 36v 20ah ping powering an ebikekit 9c motor and it charges to 44.8v (was 45.3) and after a 22 mile round trip registers 34-35 volts having used 12-14ah.
It has covered 3243 miles so far and the battery and charging has been faultless approx 145 charges (I have never run it to cut out and it does also power my lights).
So far so good.
(all data via cycle analyst device fitted at the same time)