I notice no one has answered your thread so far. Perhaps that's because we can't quite figure out what it is you want to know. I certainly don't know much about electricity, but maybe I'll be able to help you clarify your question for someone who can
First off, there are three different electrical components which are frequently use while camping. You mention a "converter"
, which converts 120V A.C. power to 12V D.C. power. Your trailer has one that is used to run your lights, etc., and recharge your battery when you are hooked up to a 120V A.C. power source (such as a campground electrical pedestal. An "Inverter"
converts 12V D.C. power to 120V A.C. power so you can operate the 120V outlets to run a television, hair dryer, CPAP machine, or whatever. However, you won't be able to operate them for more than 3-4 hours without dropping your battery charge below the 50% level. To run them longer (or to operate a more power consumptive device like a space heater, you'll need 2 or more batteries (either 6V or 12V) tied together. Then you'll need to recharge them using either solar or a "Generator"
- the third frequently used component. They typically run off either gasoline or propane. You can either use that to plug in a battery charger to recharge your batteries, or simply plug in you RV power cord to the generator and let your RV's on-board converter recharge the battery.
Now, if you are "boon-docking" (camping without electrical hook-ups), none of your 120V A.C. outlets will work - nor will your microwave. Only the items running off your 12V D.C. battery will work: your ceiling lights, bath & stove fans, your radio, the thermostat & fan for both your refrigerator and furnace (both operating on propane), your Propane/CO detector, and your 12V D.C. "cigarette lighter style" socket (if you have one).
Since your link shows a good number of electrical components, we must ask the question "Will what
work"? and "Work for what
"? If you're referring to the 12V D.C. plug-in with the 120V A.C. outlet and the 2 USB ports, you could probably use it to charge your cell phone and maybe plug in a laptop or small LED TV for a couple of hours of use. Much more than that would probably drain your battery below the 50% charge level - shortening its life. Even operating the regular "on-board" 12V items listed above is going to require recharging the battery to about 90% the next day.
So, if you can be more specific about what you want to operate and for how long, and which specific electrical device (in your link) you are considering, I'm sure one of the many more electricaly-inclined members here will be happy to answer your questions.
Best of luck, and Happy Camping