My Blue Smart charger ip22 12|30 (1) when set on the high setting (14.7V) will rise in voltage to 15V in bulk and sit there in absorbsion for hours until float. Temperature is 10°. The batteries are new trojan t-105's and are in good working order. Is this normal behaviour as there is a lot of off-gassing in this phase. My other dc-dc and mppt charger set at 14.8V don't do this. Is this a fault and will this have damaged my batteries?