A ProMariner ProSport HD 2-bank is $180. You can also install a Noco 2-bank for around $120. Both chargers ship with cables that make it easy to install. Not sure but both may have 120vac power plugs. Mount in a reasonably dry area near the batteries (within cable lengths. Also nice to be able to see front panel for status lights for troubleshooting if you need them. I use both brands on my 4 battery system.