Best Battery Charger for Four 6V Trailer Batteries in Series with High Amp Hours

Question:

I have four 6V 210AH batteries for my trailer. Which charger is best for these? I have them chained together in pairs. I see in another response that you mentioned the CTEK MULTI US 7002, but it says it is only rated for 150AH. So...and I am ignorant in these matters...I dont understand how a 150AH charger would be adequate for ONE 210AH battery, much less two chained together 420AH, right?

asked by: Jeremiah G

Expert Reply:

If you have four 6-volt batteries wired in series to for 12 volts and 420 AH, then you will need the CTEK # CTEK56674 designed to charge batteries rated for 50-500 amp hours. Works with lead acid including AGM and most gel batteries. This powerful 8-step charger charges batteries quickly and then uses a maintenance pulse charge to keep them topped off until ready for use.

expert reply by: Adam R