Thanks for your reply. The reason I queried the red/green light sequence is that I wondered if mine might point to a different kind of issue because the green light stayed on longer than the relatively brief red. For example, in your case it happened immediately and your larger, single TC Max battery only reached 60%. Lots of similar red/green issues when you Google, with a variety of apparent causes: https://rb.gy/94ihav

In my case, the most plausible idea that shows up is “BMS balancing: The battery management system (BMS) may be trying to balance the cell packs internally” …because in both my cases, although the battery total on the display was 100%, one of the two batteries was slightly lower than the other. When I rode my bike the next day this had corrected itself.

My dealer seems to hint at something similar:  “What i suspect is that the BMS is deciding what to do over charging based on its algorithm. I wouldn't worry about it myself because you need to remember that these are vehicle manufacturers 1st and software people 2nd.”. 

As things stand, of course, the dealer seems to be the gatekeeper to getting more help. No suggestion from mine that the charger is/could be at fault. Only by trying a new charger could I put this to the test, but I don’t have one to try. Hence I’m left in limbo trying to make sense of it for myself, hence searching for opinions from fellow owners like yourself.

I have also the problem with the red/green lights when charging. But my problem is different I suppose. My battery is discharged to 0% and only 60,5 V. I contacted the Supersoco service and they told me that the battery has too low voltage and that's why the charger can not charge... Does anybody know if there is some possibility to force the charger to charge the battery? If I had another 72V battery I would connect it to my deeply discharged battery to increase the voltage. But I have no such possibility...

Hello,

If you have not very good knowledge about lithium battery, you can't repair yourself.

Several dealer/repairer can do it, it's not cheap, but it's cheaper than buy a other battery.

The issue is to remove the case of the battery pack, to charge individualy each element, one by one, for a small time (several minutes) with a special charger, to increase their voltage "manually".

When the voltage of each element will be ~3,5V, the total voltage of the battery will be ~ 70V and the BMS should accept to charge with the SUperSoco charger.