Aloha everyone!
I have built a tiny house on a trailer and am now building the off-grid system. I am looking for some advice on grounding my system, wire gauge needed in a few places, and any other insight you might find helpful!
My system is as follows:
Victron quattro 24V/5000A/120V inverter charger, 6x 24V/50Ah LiFePO4 Battle born batteries, 150/70 victron MPPT charge controller, 250A victron busbars.
It is wired as such:
Solar array (still to be purchased and installed but will be ~1600W with Q-cell 400 panels on my standing seam aluminum roof with snap-n-rack system)--> midnite solar combiner box with a 30A DC breaker--> charge controller--> positive end (4 awg fine stranded) to 80A ANL fuse--> positive busbar and my negative end (4 awg fine stranded) to my negative bus bar.
Batteries wired in parallel with 2/0 cable--> positive end to battery switch--> positive bus bar. Negative end to 500A/50mV smart shunt--> negative bus bar.
My positive bus bar is then connected to a 400A class t fuse--> inverter. My negative bus bar connects directly to my inverter.
My inverter is then wired to my electrical panel with 6/2 solid core wire.
I plan to use 6 awg braided copper wire to tie my solar panels together and ground them.
But my question is where do I ground from? Is it ok to ground from multiple locations all to one ground? Do I treat this as a floating system since it is a trailer and just bond the trailer and gas lines together with my system? If I ground from one place in my system (the electrical panel, the solar array, the negative busbar, etc.) is my entire system grounded because I am all tied together? Should i use a grounding rod? Should I just bond my electrical panel to my trailer and gas lines and then earth ground my solar system?
What gauge wire should I use to connect my solar strings to my combiner box and my combiner to my charge controller?
Any insight is appreciated!
Thank you!
Dustin
I have built a tiny house on a trailer and am now building the off-grid system. I am looking for some advice on grounding my system, wire gauge needed in a few places, and any other insight you might find helpful!
My system is as follows:
Victron quattro 24V/5000A/120V inverter charger, 6x 24V/50Ah LiFePO4 Battle born batteries, 150/70 victron MPPT charge controller, 250A victron busbars.
It is wired as such:
Solar array (still to be purchased and installed but will be ~1600W with Q-cell 400 panels on my standing seam aluminum roof with snap-n-rack system)--> midnite solar combiner box with a 30A DC breaker--> charge controller--> positive end (4 awg fine stranded) to 80A ANL fuse--> positive busbar and my negative end (4 awg fine stranded) to my negative bus bar.
Batteries wired in parallel with 2/0 cable--> positive end to battery switch--> positive bus bar. Negative end to 500A/50mV smart shunt--> negative bus bar.
My positive bus bar is then connected to a 400A class t fuse--> inverter. My negative bus bar connects directly to my inverter.
My inverter is then wired to my electrical panel with 6/2 solid core wire.
I plan to use 6 awg braided copper wire to tie my solar panels together and ground them.
But my question is where do I ground from? Is it ok to ground from multiple locations all to one ground? Do I treat this as a floating system since it is a trailer and just bond the trailer and gas lines together with my system? If I ground from one place in my system (the electrical panel, the solar array, the negative busbar, etc.) is my entire system grounded because I am all tied together? Should i use a grounding rod? Should I just bond my electrical panel to my trailer and gas lines and then earth ground my solar system?
What gauge wire should I use to connect my solar strings to my combiner box and my combiner to my charge controller?
Any insight is appreciated!
Thank you!
Dustin