In Re: Scooter + Rain + Mountain Chen = Dead. XM-2000 usatracy mentions his preference for bank charging, again. Great. I mostly agree but I'm having a hard time with one aspect -- carryability.
The specific charger: http://www.boatandrvaccessories.com/VEC-1093DBD.htm is pretty large, and five of them (for a 60v pack) would be beyond the carrying capacity of a scooter. I'm not talking about weight, but the size.
I've looked at this one at Lowes: http://www.boatandrvaccessories.com/VEC-1087B.htm
It too is large size, but that's mostly due to this tray on the back for carrying cables. That could be cut off.
Five of these are more carryable: http://www.boatandrvaccessories.com/VEC-080BD.htm
But the charging rate is a measly 2 amps per battery.
There are some chargers like Soneil and a couple other brands which are carried by evparts.com or evdeals.com or electricrider.com -- these chargers are closer in size to the VEC-080BD and in some cases have a higher charge rate.