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Hi Joe, I've done this alot on my golf cart. You'll need to seperate the battery's into groups of 12v for 12v charging by disconnecting interconnecting leads. This takes about 2.5days to fully charge all sets(3) on T-105 battery's from total discharge to fully charged. It takes six days using a 6v charger with again isoluating each battery. You can series (3) 12v chargers for the fastest recharge time, about 10hrs from fully discharged to fully recharged. Use a timer on the circuit to keep from over charging the battery's. I had a 40a(regulated) and 10a(non-regulated) charger so I bought another 6a(non-regulated) (cheap). Just series the charges just like battery's and the total output will be about 40vdc. The timer is needed because the regulators will not work being in series. Why I don't know other than the regulator can't "see" sense the battery resistance to make the regulator work. You can buy 1.5a/12v PWM rechargers from Wally World, about $18eh. Thease may work very well for this application as PWM charging has three charging stages, bulk-finish-float, and will out preform a "old method" 10a/12v regulated charger. You can leave a PWM charger connected for life without ever over charging the battery's where as a normal 10a charger of the past will over charge a battery over time. You can also series (3) 12v solar PV's and add a PWM charge controller(regulator) to recharge the battery's too. One 4amp(64w), and two 1amp(15w) PV's would take about 2days to fully recharge a dead set of golf cart battery's. This would produce about 80ahr in two days (full sun) or just about maximum battery usage on a 36v golf cart. T_Bone
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