What gauge wire from batteries to inverter

SoundGuy wrote:
Typical of many travel trailers mine has these awful terminal strips mounted on the trailer frame just below the front pass through storage compartment.



I'm going to take this opportunity when installing the new G31 AGM to replace those strips with this 7-way weatherproof junction box I bought at Princess Auto today.



My plan is to connect the inverter to the battery with 12" to 18" of 1 or 2 gauge pre-made battery cables, then cut my existing 6' lengths of 4 gauge that had been running from the inverter to the battery on the tongue and instead wire those to this new junction box which will be directly below where the new G31 will be sitting. This will really clean up the entire setup, protect those terminal connections from the elements, and minimize voltage drop between the battery and inverter. :B

mapguy wrote:
Fyi, that 7 way junction box is for trailer light/brake wiring and probably won't support the amps of an inverter as listed.

The inverter wires aren't going anywhere near these terminals but directly to the battery. You're absolutely correct though, this box is intended for light / brake wiring but the size / weight of the threaded studs are exactly the same as those terminals already in use. That said, none of this may matter as the more I look at the above pic the more I'm beginning to believe those aren't just terminal strips but rather auto resetting circuit breakers. I'll know for sure once I take a look but the trailer is in winter storage right now so it'll be awhile before I can verify just what I'd dealing with.