From an owner's manual
Float voltage (Flooded wet cells) 13.5
Absorption: 14.4 to 14.8
Bulk it will matter where you measure the voltage but at the Charger it should be in the absorption range unless the charger is also an inverter and the batteries are sucking full load.. I have two "Converters' one is an inverter within 3 00gauge feet of the batteries and the other is a 80 amp converter (Which I prefer) that's about 50 feet of what looks like abou 2 ga from the batteries. that last one there is a bunch of drop as it makes the trip.