Thread: Onboard charger

I like a charger with a slower rate of charging. The slower the charging rate, the cooler the battery stays and you'll get a longer battery life that way. The good chargers roll over the charging amperage to the weakest batteries as each battery becomes fully charged. Your cranking battery usually stays stronger than your trollers because the engine helps keep it charged when it's running. The amps that are used to charge the cranker then roll over to the trollers, and so on. With a 10-15 amp per bank charger, the weakest battery in this chain get up to 45 amps of charging on a 3 bank charger when the other two batteries are fully charged causing the weakest battery to become even weaker over time.