Two unexpected behaviors:
1) Whenever any one or more cells of a connected Victron smart Lithium battery reads below 3.2V (3.18V for example) the BMS will stop continuous charging/current flow from the input side to the output side (i.e. from alternator/starter-battery port to the charging output). Instead the BMS will pulse on an off the charge current. Especially when the Lithium battery is under load (but still above a safe cut-off voltage set on the battery of, say, 2.8V) and if the alternator can deliver charge current, any extra power delivery into the system is welcome to prevent a shut-down.
I don't understand the rationale for this behavior nor the fact that this threshold voltage is not a user-accessible parameter.
==> Can there be a firmware update to rectify this behavior and expose to the user a "full charge above this threshold voltage" parameter?
2) Others have commented already: it is odd that the BMS does not function if no sufficient voltage (around 7-8V) or so is present on the input side. In case of a failure of the alternator or starter battery, the BMS will hence shut down all electrical loads. In for example a marine application this behavior can be dangerous. Is there a work-around to keep the system powered up in the situation where the alternator and starter batery fail but the Lithium battery is in tact to keep marine electronics such as navigation going?
