Hi multiplus 3000 in yacht from new. Currently have new Yuasa dcb batteries 240ah, 2 banks of 4. This happened with prev battery bank also. When back into marina and re connected to shower power and charger turned on about 4 to 6 hours later co2 alarm goes off. I believe this is activated by the batteries gassing. If in the vicinity of the batteries at this time there is a smell. When we looked at the dim switches on the charger all are set to off. We are wondering if number 5 dim switch which relates to Adaptive charging were turned on might the charger sense the batteries state of charge and not overcharge?
Please go easy I'm clueless when it comes to electrics