Join Date: Dec 2019
Location: West Boston suburb
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Obviously can't be done directly.
But any 120 vac input / 12 vdc output 'charger' would work (each phase is 120 vac to neutral). Or even a 240 vac charger between any two phases.
Preferably you would use a regulated 12 volt float charger with a boost or charge mode. The output current of said dc charger isn't critical as long as it is regulated for proper output DC voltage - in this case could be 13.2 to 13.8 vdc.(varies depending upon the chemistry of the cells).
Anything from a couple amps DC and up would work, lower amp capacity would only mean a long charge phase.
A 'boost' mode is used for quick charging, after which it drops back to float mode for long term maintenance.
Hope I am properly understanding your Q...
Last edited by Melson; 02-10-2020 at 03:17 PM.