I just bought a 2021 DSR 14.4, with a dealer-installed 3.6 Power Tank extra battery. I've taken it out for a couple rides, and noticed a discrepancy between the % of battery used on a trip, and the Wh/mi reported for the trip. If I use 100% charge = 15.8 kWh nominal capacity (main battery + power tank), the math doesn't work out. But if I use 100% charge = 12.6 kWh (just the main battery), the calculations all make sense.
I used the Zero Android app to connect to the bike, and opened the Firmware Manager. It shows MBB v31, and BMS v38. See screenshot. Shouldn't it also show the power tank's BMS version?
I removed the seat, and verified the connections. The power cabling runs to the motor controller, and the communication connector looks correctly seated and has no bent or loose pins. Also, on the left side of the extra battery, there is a small round window to view what appear to be 4 status LEDs. With the bike turned on, the left-most LED is Red, and the other three are Green. See picture. Any idea what these lights mean?
When I turn on the keyswitch, I hear the main contactor close, followed closely by the power tank contactor. So that much is working.
So, I'm suspicious that the Power Tank is not working to add range to the bike, or at least that the MBB isn't configured correctly. Is there a procedure to verify that it is working?
And yes - it's under warranty so I could just take it back and let the dealer sort it out. But the dealer is a long way away (4 hours one way), and if it's something simple I can fix that would be a lot faster.
Thanks!