My initial setup cost a little under $17,500. I bought all items from the same vendor to get the best pricing via a project discount.
6x REC N-PEAK Series 325 Watt panels @ ~$200/ea
2x Victron SmartSolar MPPT 150/35 solar charge controller @ ~$300/ea
2x Victron Quattro 48/3000/35-50/50 inverters @ ~$1750/ea
2x Victron Autotransformers @ ~$600/ea
2x Victron Orion-Tr 48/12-30A DC-DC converters @ ~$200/ea
1x Victron Venus GX @ ~$300
1x Victron BMV-712 @ ~$200
3x SimpliPhi 3.8kWh batteries @ ~$2600/ea
That's around $15,200 in major components, then the cables, boxes, breakers, etc brought it to a little over $17K.
I could run both ACs without soft starts, no issue. There may be something to that power management system - but you don't need it for a system this size if you aren't running air conditioning all the time.
Also note, REC is a massive commercial panel manufacturer and SimpliPhi is a large commercial battery manufacturer. Jaboni is rebranded Victron. Dual Victrons provide true split phase 240V power like your 50A rig is designed to run on, without a phase selector. The Autotransformers (which are completely optional) allow you to load balance loads across both inverters. And there has to be some place to put your batteries so that they aren't outside the rig. There is plenty of room behind the false walls in basement storage in almost any fifth wheel.
