Quote:
Originally Posted by Phil P
Hi
The minimum voltage for charging a 12V lead acid battery is 13.8 and the maximum voltage for charging a lead acid battery is 14.4. 14.5 volts you start boiling the acid and will eventually damage the battery.
So 14V is approaching the limit 13.4 is below the normal charge rate but because these batteries are commonly charged all the time the trailer is being used or towed 13.4 would probably get you by but would never get the battery to the fully charged voltage of 12.7V.
Phil P
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If you look at Interstate and Trojan they recommend 14.8 volts and Crown recommends 15 volts for charging their flooded batteries. This prolongs the life of the battery by getting then fully charged.