I have had a BBS02 kit for over a year and finally got it installed. I have no power, nothing. The battery is fine. I have 54.3v going into the motor and about 30v coming out of the motor at the P+ on the motor 8 pin output cable. I have no power to the display, I disconnected the monitor and plugged in a configuration cable, got nothing. Got a new cable, still nothing. The voltage at the P+ pin seems to vary between 20 to 45 volts at times. The ground at the 8 pin connector is fine. As it has been over a year there is no warranty.