Whole RV Inverter/Charger

MrWizard wrote:
this keeps the neutral leg from being overloaded by an imbalance

This is absolutely wrong. The two 120V legs are not in phase with each other so there is no way the neutral leg can be overloaded. If that were true, 240V services would use 6ga wiring for L1 and L2 and 2ga (or bigger) for N. They don't because the maximum current that can ever travel down the N wire is whatever is coming in from L1 *OR* L2, or the sum. However, the sum can never exceed what L1 or L2 can carry separately, because they are 180 out.

This is precisely how you get 240V power at home.

there is confusion
you mentioned 50amp. i thought you had a 50amprv
you mentioned (2) a/C

are you rewiring a 30 amp rv for 50amp

i see a double pole 50 amp main in your pictures
(coming from your shore power plug?)

so yes my comments about power distribution are very on topic
yes (1) a/c does simplify the power distribution
i would still split the loads on what will be used with shore/generator (with 30amp they will all be on the same leg anyway)
panel distribution will only come into play when, when on 50 amp shore power, and then you 'want the real use balanced'

do you have a roof top a/c or basement a/c ?
basement a/c might have (2) compressors
only (1) a/c breaker has wire ? the other is empty ?

(you never ever go to a campground with 50 amp hookup ?)

and yes. no generator, no TS

the input lugs, would be for input IF there was a meter and main before the panel
all RV's have a main breaker, "that is not a back feed"

I gave you the definition of back feed

feeding from someplace that is illegal

example : if you removed the current main breaker and installed another breaker box with the shore feed and the inverter feed and (2) breakers with a manual lockout selector so only one could be used
you could connect that to those input lugs at the bottom of the panel are currently 'unused' that would be safe and legal

your current use of the term 'back feed' can cause confusion, and mis-direction
code says there has to be an input breaker
that breaker can be in the panel (the one you have now) or outside the panel in another box (often done in commercial wiring, not done in RV's)
a main breaker in the panel like you have it is LEGAL CODE, not back feeding

but that is beside point (just clarification)

MrWizard wrote:
there is confusion
you mentioned 50amp. i thought you had a 50amprv
you mentioned (2) a/C

are you rewiring a 30 amp rv for 50amp

and yes. no generator, no TS

the input lugs, would be for input IF there was a meter and main before the panel
all RV's have a main breaker, "that is not a back feed"

I gave you the definition of back feed

feeding from someplace that is illegal

example : if you removed the current main breaker and installed another breaker box with the shore feed and the inverter feed and (2) breakers with a manual lockout selector so only one could be used
you could connect that to those input lugs at the bottom of the panel are currently 'unused' that would be safe and legal

your current use of the term 'back feed' can cause confusion, and mis-direction
code says there has to be an input breaker
that breaker can be in the panel (the one you have now) or outside the panel in another box (often done in commercial wiring, not done in RV's)
a main breaker in the panel like you have it is LEGAL CODE, not back feeding

but that is beside point (just clarification)

Rv *IS* 50 amp. I'm not talking about rewiring anything to 30A, someone else suggested that to reduce need for 2 inverters to 1. We have progressed past that.

I never said the RV had 2 ac units, only two circuits in the breaker panel. Like I said, it's entirely possible that circuits doesn't power anything.

I think you are confused or have been led to believe that back feeding is somehow illegal. It's not. Not at all. It's a completely acceptable practice. Again, I encourage you to look at the NEC 408.36d. No matter what, NEC is right and you and I are wrong. There is still circuit protection with back feeding - a breaker doesn't care what direction the current is traveling.

We have already drug this out too far and are probably losing people from this thread but you are the one that is wrong and adding to the confusion. Before you reply in anger, please do some research and educate yourself as I'm sure you will find that you are the one that is misinformed about the definition of back feeding.

Now, let's please get back to the issue at hand.

power from a utility source, coming into a breaker

is NOT a back feed, you re mis-construing the term, just because of the location of the breaker

anyway it does not apply to what you want to do

I won't mention it anymore

what is important is the correct separation of the circuits involved
and you have your designed laid out

MrWizard wrote:
power from a utility source, coming into a breaker

is NOT a back feed, you re mis-construing term, just because of the location of the breaker

anyway it does not apply to what you want to do

Whatever. I'm over it. I quote NEC code and you quote your memory. Try to get a building permit based on what you *think* is correct versus what the NEC says.