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48V Quattro 50 AMP RV w/solar, advice requested?

Community,

I'm most of the way thru installing in a 2021 Keystone Fuzion 429. 50AMP shore & Onan 5500 generator. So, I put up four 550W bifacial solar panels, ran them to a solar panel breaker box, split two panel to each of a 150/70 Victron MPPTs, to two Lynx Distributor, Cerbo, Global link, talking to Touch 70, smart battery protect to Orion 48V to 12V to feed the existing 12v batteries and four 51.2V batteries off Lynx power in for the 48V side. I'm left with the 48V Quattro and replacing the existing auto transfer switch with it. Anyone have experience with removing a plain ATS one for one with the Quattro? I've seen many people doing dual Quattros over concerns of having limited shore power combo with solar and wanting to maintain 240V all the time. I only went with one Quattro because the dual AC in and out should run everything fine. I'd appreciate critiques, advice, wiring diagram. Any input to this rig. A lot of people have Multiplus II and other combos that aren't applicable with the Quattro lay out. Much appreciated before the final step here.

MultiPlus Quattro Inverter Charger48v battery
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snoobler answered ·

I'm assuming in your current setup, your ATS simply selects Generator or Shore. You'd simply move the inputs to the ATS to the Quattro; HOWEVER, your generator is likely two poles of in-phase 120V, and your 50A shore is split phase input.

The Quattro does not have "dual AC out" per se. It has AC1 out and AC2 out, but when active, they are simply connected with a contactor and in phase with each other.

The Quattro can only accept 120V input and it can only output 120V.

You have a problem to solve:

When inverting you'll only get 120VAC out. To power the whole trailer, you have to supply L to L1 and L2 of the panel for 120V on each leg but 0V between.

When on 15A/30A shore or generator, you're good.

When on 50A shore, you can only connect L1 to the inverter and must leave L2 disconnected.

When on shore, you're limited to 50A @ 120V.

You've cut your available power in half even on 50A shore. If this is okay with you, you're good.




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mrviridis avatar image mrviridis commented ·
Thank you for answering, so, one this is why I see a number of people doing two quattros, but I appear to have gotten not quite accurate info from the rep that sold my equipment. I understood that when on battery power I'd only have one 120VAC. It's seems your saying that with the quattro instead of my OEM ATS, that even on 50A shore I'm only going to have 1 of my 2 120VACs? That's a real downgrade. Do you suggest a solution, means of running the ATS and the quattro to keep both ACs on shore, or to have a not too much hassle connecting the generator only when needed. I'm not super pumped to buy a second quattro and I've heard some cons to that as well.
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