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solar: how to run wires, cut holes, etc
I'm trying to figure out how to run needed wires for a solar/battery setup in my 2019 Jay Flight 32BHDS TT.
Renogy solar system: 3-100W panels, 40A MPPT, 2-100Ah lithium batteries, and 2000W inverter
I also have a generator.
The controller, batteries, and inverter live in the outside-access compartment (part of the under-bed compartment).
I don't really know how these TTs are constructed, so I'm leery about just drilling and cutting into things.
I need to run the following wires/cable:
* the 2 10 AWG wires from the MPPT to outside for the solar panels (I will not be mounting these on the trailer, but will pull them out when camped somewhere).
I figure I can store these wires when moving in the house battery tray box once I get rid of the heavy piece of junk in it.
* a pair of 6 AWG from the batteries to outside to hookup where the default house battery is hooked up (or should I do 4 AWG? the panel converter is 60A).
* 12 AWG Romex from the inverter to the circuit panel
As I will be making a hole for the solar panel and battery wires, I might as well run the Romex with them, right?
Do I just cut a hole in the floor in the outside-access compartment? I have no idea what to expect there. I assume laminate, plywood, and insulation, and make sure not to end up on the metal frame.
As I've crawled all under the trailer, I don't expect any wires there and I can see the propane line.
I'm thinking I can run the Romex under the trailer along with other wires I see, shoving it through the hole in the floor behind the circuit panel.
And then I hook it up to the 50A breakers (I hope the 12 AWG will fit in there along with whatever is there now, 6 AWG I guess).
For operation, if I understand correctly, when using the inverters I'll want to flip the converter breaker to off, and will only need to flip the converter breaker to on when on shore power/generator.
With the converter on, it should then charge my batteries. Is it bad if the inverter is on in this setup while the converter is on, other than a waste of power?
(I added some pictures, but i don't know how this forum will post them, so referencing them here is difficult)
The first pic (IMG_2366) is my current mess of equipment, and I assume i can drill through the floor? Can I use a spade bit, or should I spend money on a hole saw bit?
The second pic (IMG_2365) shows what I'll connect the batteries to, quite close to the compartment in the first pic.
And does anyone know how that group of colorful wires runs through the trailer? It's also shown in the last pic (IMG_2213).
The third pic (IMG_2245) is behind the electric panel under the oven. I assume I can shove more wires through that hole up from the black foam in pic 5 (IMG_2227).
The fourth pic (IMG_2233) is the electric panel, where I'm also hoping I can attach 12 AWG Romex to the 50A breakers as well (but I haven't pulled the breaker to inspect yet).
And for sealing any holes I make, do I need some special foam, or is a can of that yellow Great Stuff fine?
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