I am experiencing low battery problems at our regular home (48v) and at our off-the-grid bungalow in the bush (24v) with my Victron system (i.e. "low battery" was coming on far too soon and battery never seemed to fully charge). This is one reply I received from my battery supplier after my installer pointed to a problem with the battery BMS at our lodge (48v also in the bush);
"Your assessment is completely incorrect in this regard. Your installer set the solar charger to charge to 56.2V and it only charged to 55.9V. This can be verified by a multi-meter. He then had to increase the setting on the solar charger to 56.7V to get it to charge to 56.4V. You can see this on the recorded data. We have a special instruction in our manual to ALWAYS verify that the chargers charge to the correct set point as we’ve seen some of them not to do so. The Victron system has a function called DVCC (Distributed Voltage and Current Control) which allows the battery to control the voltage set-point. This is not enabled on your 8kWh battery.
Your belief that the BMS is unable to communicate with the Victron system is unfounded. I have investigated each and every parameter between the battery and the CCGX and these are communicated correctly."
As you can see our installer fiddled with the Victron charger to get the system to work at the lodge. I really don't understand what DVCC means and whether or not it is wise to use this setting, or whether it will even solve the problem. Any advice will be highly appreciated. I am now experiencing the same problems at my home and our bush bungalow having just bought new lithium batteries (interestingly we did not have any such problems with our lead-acid batteries).
