Hello, guys i finially build my yuba ebike too! After reading tons, and tons of reviews i went with a bbshd and 91 30q 18650 cell to make a 13s 7p pack which seems to be running pretty dam good! My question is hot off the charger my pack is only 52.6 volts. I am not sure if the is a result the cells or the bms, all in all i clocked 29 miles today and only lost two bars.