I have an electrical question (grounding with inverters)

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Dr. Dickie

Member
Joined
Sep 23, 2020
Messages
212
I have my new split phase inverter (Sungold 6000 Watt), it is a monster (72 freaking pounds! Seems no one makes a 48V 60000 Watt split phase inverter that doesn't also include a charger (can be hooked to grid AC going in--which I don't need).
Interestingly, this unit appears to be the EXACT same unit as the AIMS 48V 6000 Watt split phase, which is typically about $800 more.
Anyway, my question:
In the instructions, it says when wiring the unit up for split phase, the two hots go to hot 1 and hot 2 and the neutral goes to neutral (duh!). They then say to hook the output earth ground to the earth ground at the input/output connection.
I noticed that they have the unit's chassis ground bonded to the output earth ground connection. Since this will be going to the solar electrical panel, which has its earth ground bonded to the home electrical panel ground, I would assume that I do NOT want to bond an earth ground the chassis of the inverter at the solar shed. That would then create a ground loop and cause big no nos. I just want to make sure that I a thinking correctly.
The chassis grounding will be accomplished by the home panel earth ground carried to the unit through the wire run. Just want to verify, as I am stepping into new territory.
Thanks in advance
 

OffGridInTheCity

Active member
Joined
Dec 15, 2018
Messages
1,706
You comments sound identical to my situation. My AIMS (and PV array by the electrician) are all grounded thru the home ground - which is the single earth-ground I have in my entire system. I do have Midnight Solar surge protectors (lightening arrestors) at the array combiner boxes to take care of lightning surge prior to coming into the house - but that's actually different than grounding. @Will Prowse just did a youtube warning about ground loops. As always - I'll be interested to see comments on this topic - thanks for brining it up :)
 

Dr. Dickie

Member
Joined
Sep 23, 2020
Messages
212
You comments sound identical to my situation. My AIMS (and PV array by the electrician) are all grounded thru the home ground - which is the single earth-ground I have in my entire system. I do have Midnight Solar surge protectors (lightening arrestors) at the array combiner boxes to take care of lightning surge prior to coming into the house - but that's actually different than grounding. @Will Prowse just did a youtube warning about ground loops. As always - I'll be interested to see comments on this topic - thanks for brining it up :)
Yeah, I saw Will's video, but his set-up was sufficiently different than ours that I just want to make sure.
I am watching a video by Roland W, and he is addressing this exactly. And, yeah, no separate earth ground, but he says to run a wire from the chassis ground point,to the output earth ground (which goes to the panel earth ground). Don't know if I will bother doing that, as they are bonded inside the chassis.
 
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