There is an official statement from their own battery manual under battery care. But of course it does not relate to JK and a DIY bank.
4.The batteries must spend at least 2 hours in absorption charge mode each month to ensure sufficient time in balancing mode. For detailed information on how the balancing process works, see the Cell balancing chapter.
@peter_m I understand you may want Victron to comment but they have very specific instructions for their products. Their instructions are very clear so no need for further comment.
If enthusiasts want to alternatively program Victron equipment to handle other types of batteries, Victron provide the ability for people to do that. In fact they are extremely accomodating for those who want to experiment and do their own thing.
If the SOC is collected from the BMS you can in most cases acces the BMS via software to set a SOC value that matches with the cell voltages that are measured. Some BMS have the tendency to slightly miscalculate tbe SOC so over time it drifts away from the real value (like, in my case with Daly).
If you don’t want to charge the batteries to the top, you can set a max. voltage that lies under the specs of the battery manufacturer there too.