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design check-rv related

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el jefe

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Joined
Apr 11, 2024
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6
Location
central texas
so far ive had difficulty finding any info on what i plan on doing and am hoping for some feedback on my plans.

i have a stationary 50 amp rv that gets used primarily on weekends but not all weekends and sometimes for 3-4 days at a time.
i just wired up my eg4 6000xp, eg4 14.2 kw powerwall and 16 300 watt hyundai panels on two series strings. i havnt turned it on yet.
from the load out lugs of the inverter i ran 6ga wire to one of those prewired 110/30a/50a rv pedastal panels.
my questions are :
-do i ground the rv panel? assuming the inverter comes unbonded from the factory and the rv having a chassis ground.
-am i thinking correctly about how my design works?
my understanding of a 50amp rv panel is it is two seperate hot legs feeding its panel when plugged into a 50amp plug and only one half of the panel is hot when using a 30amp adapter.

thanks in advance
 
el jefe said:
so far ive had difficulty finding any info on what i plan on doing and am hoping for some feedback on my plans.

i have a stationary 50 amp rv that gets used primarily on weekends but not all weekends and sometimes for 3-4 days at a time.
i just wired up my eg4 6000xp, eg4 14.2 kw powerwall and 16 300 watt hyundai panels on two series strings. i havnt turned it on yet.
from the load out lugs of the inverter i ran 6ga wire to one of those prewired 110/30a/50a rv pedastal panels.
Click to expand...

el jefe said:
my questions are :

-do i ground the rv panel? assuming the inverter comes unbonded from the factory and the rv having a chassis ground.
Click to expand...

The panel should be grounded, but it's not bonded.

There is no N-G bond in an RV. It is always supplied by the source. Either shore or your inverter.

el jefe said:
-am i thinking correctly about how my design works?
Click to expand...

Doesn't seem like it.

el jefe said:
my understanding of a 50amp rv panel is it is two seperate hot legs feeding its panel when plugged into a 50amp plug and only one half of the panel is hot when using a 30amp adapter.
Click to expand...

No. When plugged into 30A shore, the 30-50A adapter shorts L1 to L2 on the output, so your 50A panel is getting the same 120V to both sides of the panel.

It is my understanding that with the split phase 6000XP, you can no longer plug into single phase (15A/30A) shore.
 
thank you both for your replies,very much appreciated. so just to recap, i am completely offgrid.
so i ground my rv panel and keep the N/G bond intact on the inverter.
and am i understanding correctly that running l1 and l2 to thier respective lugs on the stand alone rv 50amp plug box will not work correctly when i plug my rv 4 prong lead into it because the panel in the rv is somehow single phase?
go easy on me, i can build a house in my sleep and hot rods while awake but solar is a bit slow on the uptake.
 
el jefe said:
thank you both for your replies,very much appreciated. so just to recap, i am completely offgrid.
Click to expand...

Will you EVER run a generator?

el jefe said:
so i ground my rv panel
Click to expand...

Your RV panel should already be grounded.

el jefe said:
and keep the N/G bond intact on the inverter.
Click to expand...

Yes.

el jefe said:
and am i understanding correctly that running l1 and l2 to thier respective lugs on the stand alone rv 50amp plug box will not work correctly when i plug my rv 4 prong lead into it because the panel in the rv is somehow single phase?
Click to expand...

The RV is not single phase.

It is split phase when on 50A shore power being supplied with 120/240V split phase power:
L1-N 120V
L2-N 120V
L1-L2 240V - but likely nothing in the unit uses 240V.

When supplied with 120V single phase power, both sides of the RV panel get the same single phase.
L1-N 120V
L2-N 120V
L1-L2 0V

If you wire your 6000XP split phase inverter into an appropriate 50A shore receptacle and plug your 50A RV umbilical into the receptacle, you will get split phase power to the RV panel as though you were on 50A shore power.

el jefe said:
go easy on me, i can build a house in my sleep and hot rods while awake but solar is a bit slow on the uptake.
Click to expand...

I can't do shit in my sleep, except wake up to go to the bathroom... :p
 
Currently I am not putting a generator into the mix but would like to in the future. I would appreciate your thoughts on this.
And I meant to say ground at the panel that houses the rv plugs. Your response to what I’ve been trying to clarify was very eloquent and simply stated so thank you.
 
el jefe said:
Currently I am not putting a generator into the mix but would like to in the future. I would appreciate your thoughts on this.
Click to expand...

When off grid, it's pretty much mandatory.

el jefe said:
And I meant to say ground at the panel that houses the rv plugs.
Click to expand...

I'm not following.

el jefe said:
Your response to what I’ve been trying to clarify was very eloquent and simply stated so thank you.
Click to expand...

LOL... first time I've been described as eloquent! :p
 
Let me bring this back to the topic for a minute. We can let go downhill and sidetracked again after the appropriate men of wisdom have chimed in.
I’m happy to report after getting everything all tidied up and one call to tech support to figure out how to get my battery to communicate with the inverter things are up and running! I had the ac and fridge running on full solar power and actually charging my battery with more juice than I was consuming. Which leads to another couple of grounding questions.
- should I connect a ground wire from my solar panels ground rod all the way back to my inverters subpanel ground rod?
- also I noticed a grounding bolt on the battery case. Should that be connected to the sub panel ground rod as well?
-and finally, at my subpanel am I connecting my ground to the ground bus bar or the side of the enclosure?
Thanks in advance
 
el jefe said:
should I connect a ground wire from my solar panels ground rod all the way back to my inverters subpanel ground rod?
Click to expand...
Yes
The solar array should have a ground wire connected to the main systems ground.
But there should not be a local earth (auxiliary ground rod) connection at the array.
el jefe said:
also I noticed a grounding bolt on the battery case. Should that be connected to the sub panel ground rod as well?
Click to expand...
Yes
The battery enclosure, if conductive (metal), should be connected to the main systems ground.
el jefe said:
and finally, at my subpanel am I connecting my ground to the ground bus bar or the side of the enclosure?
Click to expand...
Both
They should be bonded to the main systems ground.
 
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