2oldman, that link discusses a much more elaborate inverter setup than I want or need. But there was one very useful paragraph:
"After removing the original converter and it's wiring, I installed heavy duty battery cable to connect the inverter directly to the batteries. It's important to use heavy enough wire here, as some larger inverters can draw several hundred amps when under full load! My inverter required 6 ga. wire. I also twisted the heavy wire to help eliminate any electrical interference when operating the unit in charge mode. A fuse was used to protect the system from meltdown. I used a 100A fuse connected directly to the positive terminal of the battery."
This tells me that I can hook my much smaller inverter to the battery directly. I won't need 6 gauge cable -- I think the very light loads that I will draw will be fine with ten gauge.
Just to be clear, the inverter will be completely separate from the rest of the electrical system within the trailer.
