Hi Victron gurus
I have multiplus 12/3000/120 attached to a battery bank (12V SLA 550 Ah total new, at least 4 years old) and my Venus is dropping off the portal. The Venus is powered via the second 12V input/ouput which does not have a battery bank attached but is conveniently located to the Venus.
I suspect the battery isolator has been turned off while some work was done by an engineer and forgotten again. Last time this happened I was on the boat and recurring voltage alarms were what alerted me.
Does having the Multiplus (charger) on but the battery isolated do any harm? (If not then I will wait until I get back to the boat to check my suspicions rather than recalling the engineer).