Hi Larry,
What you are talking about is called "double conversion". I use it lots, especially when I'm on limited shore power.
Here is what I did:
1. added an auxiliary shore power cord that has two standard outlets
2. put a plug powered by the auxiliary cord in the power center for only the converter
3. put an inverter powered outlet in the shore power cord box
4. plugged the shore power cord into the inverter powered outlet.
That worked so well, that I decided to add another power outlet in the kitchen that is only powered by the inverter. That way I can use more than the 30 amps my RV is equipped with.
Since I used standard plugs, I can switch back to OEM wiring in 20 seconds.
You can not do it forever, because most converters can't "keep up" with the load, so the batteries eventually become discharged. But it is great for cooking and etc.
Larryzv7 wrote:
I’m thinking I can hook my inverter to my 5th wheel batteries, which would give me an additional 120 power source, and the trailer batteries X2 will be recharged by the shore power; or is this incorrect?