When I needed a larger battery charger I decided to go with 220 volt power and just built my own out of junk I had in my stash.
To control my home made battery charger and keep it from frying the battery I wired it into my 30 amp Morningstar PWM solar charge controller. (which the manual says not to do).
If you want to charge batteries that size in a reasonable amount of time you need a charger that will put out at least a good 20 to 30 amps.
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