Panels are ground from unistrut to unistrut then to breaker. Assume that's fine? Or best to go panel to panel as you illustrated? Also, we installed a grounding rod at the solar panel location - needed?Note that the grounding on the frames of the panels will depend on the mounting system.
The anodization and aluminum oxide are both insulators so the set-up with the washers holding the panels down may not have good electrical contact with the frames. If the grounding is to be to code there should be a commercial grounding lug bolted to each panel and a single wire going from lug to lug.Panels are ground from unistrut to unistrut then to breaker. Assume that's fine? Or best to go panel to panel as you illustrated?
Actually, that is allowed, but not recommended. I would even say it is discouraged.Also, we installed a grounding rod at the solar panel location - needed?
Earth grounded is not N-G bonded, so some clarification is needed.Read through Filter Guy's paper... Still a bit confused here as it relates to the EG4 6000XP.
I contacted EG4 directly and they replied: "the inverter housing itself doesn't need to be grounded, but there is a ground bus bar in the cabinet labeled PE. That's going to be for your A/C inputs/Output like your GEN/GRID/LOAD Input/Output locations. Each one of those connections made will need four wires L1, L2, a Neutral, and a Ground." And that, "if you do not ground the inverter, that the ground should be made at your load panel, and then connected to the ground bus in your inverter."
This being said, let's say that the main breaker panel is earth grounded (then ground to inverter from panel)
Disable internal bonding. You have the ground electrode at the main panel, this is where you should also bond N-G.what should the setting for the EG4 6000XP internal bonding be - Enabled or disabled? My thought - it should be enabled and the panel not bond at N-G.
If N-G bond is in the main panel, then the generator should be unbonded.Ok. Which is the preferred method? Let's assume in future that a generator is added (non N-G bond) would it matter where the bond takes place?
View attachment 202251
The panel clamps you are using are not rated for bonding purposes. You would need to use clamps that have a point that dig into the frame thru the anodizing.Agree bonding should be in breaker panel not internally. EG4 6000XP default setting internal bonding is enabled, thus need to change setting 26 to disabled.
Panels are ground from unistrut to unistrut then to breaker. Assume that's fine? Or best to go panel to panel as you illustrated? Also, we installed a grounding rod at the solar panel location - needed?
The panels are built on wood adjustable mounts exactly like this:
Fair enough.. Makes sense to not have grounding rod at solar panels and run ground wire to the main breaker. Assume I run bare copper panel to panel then run THWN-2 (going into conduit underground) to main breaker. Recommended copper wire size for panel to panel grounding?The anodization and aluminum oxide are both insulators so the set-up with the washers holding the panels down may not have good electrical contact with the frames. If the grounding is to be to code there should be a commercial grounding lug bolted to each panel and a single wire going from lug to lug.
Actually, that is allowed, but not recommended. I would even say it is discouraged.
The grounding wire that connects the strut and panels together should be run back to the same grounding system of the house.
6AWG is required. I used these lugs screwed to frames using stainless screws. The lug prevents the corrosion between copper wire and aluminum frame. UL stamped too. https://www.amazon.com/gp/product/B07G392449/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1&qty=3Fair enough.. Makes sense to not have grounding rod at solar panels and run ground wire to the main breaker. Assume I run bare copper panel to panel then run THWN-2 (going into conduit underground) to main breaker. Recommended copper wire size for panel to panel grounding?
Needs an EGC to metal battery cases. You can install an EGC busbar in the inverter or any location if the main panel is further away.View attachment 202475
Here is what I put together from everything mentioned... Sorry for the blurry image, unable to upload the original as it's "too large"
NOTE: Only change I made was for the L1 & L2 which is 8/3 wire not 10/3.
Question: Does the ground from EGC at PV need to run directly to the main breaker panel?
Alternatively, could the EGC from panel go to the inverter then to the main breaker then to breaker by 8/3 used with L1/L2.
Also, I understand that the EGC at PV needs to by bare copper 6 AWG min., but once at the disconnect and transition over to THWN-2 - from here on does it also have to remain 6AWG wire? In essense, bare copper 6 AWG to THWN-2 6 AWG (or 8 AWG?) to 8 AWG (8/3 UF).
Wrong section, you are looking at service entrance requirements.NEC 250.66 and Table 250.66. The EGC is required to be a minimum size of 8 AWG copper if in a protected location (ie. conduit). Bare copper 6 AWG at panels to the disconnector box.
It is not recommended to ground the AC and DC grounds at the PEBus of the inverter.The ultimate plan. Thoughts...
Where then ?It is not recommended to ground the AC and DC grounds at the PEBus of the inverter.
I have to ask why.It is not recommended to ground the AC and DC grounds at the PEBus of the inverter.
A basic wire diagram would be great!It is not recommended to ground the AC and DC grounds at the PE Bus [sic] of the inverter.