Im sure their is but i would rather have 3 59.00 maintainers than 1 for 150.00 that maintains 3 i prefer the flexibility. you can parallel the batteries and maintain more than 1 with 1 charger but you would probably need a more powerful one. When i had a boat i had a dual bank charger. It charged 2 main start and 2 auxiliary deep cycle batteries . It was built in and cost around 300.00 in1999 heres 1 i found by googling multiple battery bank charger
I gotta ask what does ..L.T.A. mean? Im not a textin kinda guy and you folks use so many acronyms that i have an acronym dictionary on speed dial
you're overthinking it, Raf
if the batteries are out of the boat, mower and TM, (or even in) go buy a 10/2 amp auto-off charger.
just throw 2amp charge on them once a month thru the off season and they'll be fine.
Sure is. Just Google 4 bank battery tender.