Having issues with my 12/30 charger tripping a 40amp relay that controls lights,pump ect, turned of 240 mains power and ran everything off the batteries fridge,lights radio ect and all was good,switched 240 back on and when the batteries reached 100% by the victron smart shunt the 40amp relay tripped and turned off 12v power. Left 240 mains on and turned of the charger and within 1 min the relay reconnected 12v , I have changed relays with no change, during these relay trips no fuses have been blown.normally leave my charger on all the time to maintain the batteries.
