ezwryder
New Member
I've been reading all the discussions about grounding and bonding and trying to apply that to my off grid cabin set up. If you don't mind I'd like to ask if this diagram looks about right. My system is pretty simple, I do not have any grid ties or generators. I know a lot of people ask so I'd just appreciate your comments if you happen to see any big red flag items. Comments about system particulars are below the diagram and I thank you in advance for your thoughts.
Starting from the left, inside cabin…
Solar component ground connections are wired to a common ground bus bar
Ground bus bar is connected to ground at main service panel
Line, neutral, ground leads from inverter to main service panel
Main service panel neutral is bonded to ground with supplied bonding screw
Two 8 foot ground rods spaced 6 feet apart with EGC to main panel
Note: Victron states the inverter’s AC output neutral is not bonded to ground.
Inside the shed…
Line, neutral, ground run to sub panel in shed about 40 feet (total wire length) from main panel
Sub panel is not neutral-ground bonded
A separate pair of 8 grounding rods are installed and connected to sub panel
Solar panel frames are grounded and run to ground on sub panel
One question I have is about the need for multiple ground rod installations. I watched the video that someone else posted about grounding and it sounded like the presenter was recommending just one grounding point. I see the logic in that. However I'm pretty sure local code requires ground rods for the main service panel and the sub panel in the shed.
Starting from the left, inside cabin…
Solar component ground connections are wired to a common ground bus bar
Ground bus bar is connected to ground at main service panel
Line, neutral, ground leads from inverter to main service panel
Main service panel neutral is bonded to ground with supplied bonding screw
Two 8 foot ground rods spaced 6 feet apart with EGC to main panel
Note: Victron states the inverter’s AC output neutral is not bonded to ground.
Inside the shed…
Line, neutral, ground run to sub panel in shed about 40 feet (total wire length) from main panel
Sub panel is not neutral-ground bonded
A separate pair of 8 grounding rods are installed and connected to sub panel
Solar panel frames are grounded and run to ground on sub panel
One question I have is about the need for multiple ground rod installations. I watched the video that someone else posted about grounding and it sounded like the presenter was recommending just one grounding point. I see the logic in that. However I'm pretty sure local code requires ground rods for the main service panel and the sub panel in the shed.