Probably have one of the Freedom 458s or Freedom SW.
need a minimum of 4kw just to keep all that stuff running and even more for surge.
the Freedom SW's can be STACKED either in parallel (doubling the wattage) or run in series (for phased voltage).
the SW 3012 is 3kw (6kw surged) is about $2000, plus controller/remote
RV Inverter Charger | Recreational Vehicles | Xantrex
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Don R.
'04 Haulmark (M42386) 42', 2 slide, 10kw -
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'04 F350 CrewCab Longbed 4x4, 50g aux tank & gear vendors dbl over