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240 VAC Inverter?


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I have a question about inverters. Some inverter shore / generator inputs are 240VAC, some are 120VAC and some are 120/240VAC. Wouldn't it make sense use a 240VAC unit and split phases at the trailer? In the case of 30A 120V only being available, you would just have the one leg available, but that seems very manageable.


So now some "sparky" tell me what I'm overlooking :unsure:



"There are No Experts, Do the Math!"

2014 Freightliner Cascadia DD16 600hp  1850ft-lb  18spd  3.31  260"wb
SpaceCraft S-470
SKP #131740

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Typical RV shorepower hookups consist of a 120/240 VAC split phase 50 amps per leg outlet, a 120 VAC single phase 30 amp outlet, and usually an additional 15/20 amp GFCI utility outlet. Onan supplies generators for RV use that may be configured with a 120/240 VAC split phase output or dual wound 120 VAC in phase outputs, the current limit ratings varying with the model in either case. As I recall, some of the smaller units also use a single 120VAC output generator, but that might be a Generac product instead of an Onan. Inverters are a different story, since they're usually not large enough to handle more than a couple of circuits at most, and none with heavy loads like an A/C.

Dutch
2001 GBM Landau 34' Class A
F-53 Chassis, Triton V10, TST TPMS
2011 Toyota RAV4 4WD/Remco pump
ReadyBrute Elite tow bar/brake system

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Thanks Dutch,

I'm planning on 7.7 KW of 48V usable lithium battery w/ 4.7 KW of solar harvest/day. Also a 48V 5000W Victron Quattro

inverter. A/C will run on 48VDC as well. All in all, a rather large system so you can see the reason for my question.

"There are No Experts, Do the Math!"

2014 Freightliner Cascadia DD16 600hp  1850ft-lb  18spd  3.31  260"wb
SpaceCraft S-470
SKP #131740

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Thanks Dutch,

I'm planning on 7.7 KW of 48V usable lithium battery w/ 4.7 KW of solar harvest/day. Also a 48V 5000W Victron Quattro

inverter. A/C will run on 48VDC as well. All in all, a rather large system so you can see the reason for my question.

Have you settled on your AC unit(s) yet? I'm planning a system very much like yours, at the moment. (email me).

Jack & Danielle Mayer #60376 Lifetime Member
Living on the road since 2000

PLEASE no PM's. Email me. jackdanmayer AT gmail
2016 DRV Houston 44' 5er (we still have it)
2022 New Horizons 43' 5er
2016 Itasca 27N 28' motorhome 
2019 Volvo 860, D13 455/1850, 236" wb, I-Shift, battery-based APU
No truck at the moment - we use one of our demo units
2016 smart Passion, piggyback on the truck
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See our website for info on New Horizons 5th wheels, HDTs as tow vehicles, communications on the road, and use of solar power
www.jackdanmayer.com
Principal in RVH Lifestyles. RVH-Lifestyles.com

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