This site is now in read-only archive mode. Please move all discussion, and create a new account at the new Victron Community site.
Hi. I have a BVM700 connected to 4x155ah deep cycle gel batteries in parallel So (620ah at 12v) My battery charger, when connected floats at 13.7v. I have set the total AH to 620, set the tail to 1% and the time to 1 minute but cannot get the monitor to indicate 100% fully charged. What am I doing wrong?
For the BMV to 'sync' to 100% SOC the following 2 criteria must be met simultaneously and sustained for the 'charged detection time'
- Charged voltage
- Tail current
You did not mention what you have set the 'charged voltage' to but if it's a non solar application the recommendation is to set it a little under the float voltage. For solar systems it's normally set a little under the absorption voltage.
Having the 'tail current' set to 1% is very agressive and may make it difficult to sync. The default is 4% and I use ~2%.
Your 'charged detection time' of 1 min is the opposite, very relaxed and may cause premiture synchronizations if charging with solar. I would increase it to 2 to 4 min.
Remember it will only synchronise at the end of a full charge cycle when the battery charge current has significantly dropped off.
