So here is what I think the scoop is for the electrical parts of the problem you described. I just went through upgrading all of the solar and electrical systems in my 25RB, so I am extremely familiar with the struggles you are having.
I put the IC-3000 inverter charger in my 2023 25RB as well. Assuming you followed the installation that GoPower says to do, your IC-3000 should be wired in from your shore power line, through the IC-3000, and then on to the power center/breaker panel in your RV. Then, the IC-3000 should also be connected directly to a bus bar connection that connects directly to your battery so it can handle charging your battery and pulling from your battery when it needs to generate AC power for your camper outlets.
The problem comes in to play because your power center/breaker panel also thinks it is supposed to take the 120v AC power that is coming in from the IC-3000, convert it to 12v DC power, and charge your battery. So your IC-3000 takes 12v from your battery, jumps it up to 120v and sends it to the power center to power all of your outlets, and then the power center takes that 120v AC electricity and turns right around and reduces it back to 12v and tries to charge the batteries itself, which you do NOT want it to do.
This process creates a vicious loop that runs your battery down very quickly. It will happen any time you plug in to shore power because the IC-3000 turns both the inverting and charging circuit on automatically when it senses incoming AC power.
So, what you have to do, and the GoPower installation guide for the IC-3000 has a warning note that says to do this during installation, is disconnect the converter module in the power center/breaker panel in your camper. The easiest way for you to do this is to turn off the breaker for it. On my 25RB, it is a 15 amp breaker and Jayco labeled it “converter” in the power center/breaker panel. Just flip that breaker off and half your problems go away.
Your battery is still connected and everything will still work with that breaker off. The only thing turning off that breaker will do is stop your power center converter from trying to charge your batteries (or run them down) since the IC-3000 is doing the charging for you. Solar will still charge, tow line will still charge, IC-3000 will still charge when on shore power, they will all still charge normally.
I left my converter installed and hooked up and leave the breaker off, just in case my inverter ever dies and I need an alternate method to charge the battery from shore power. I figure, it’s already there and paid for, so no reason to physically remove it. Just leave the converter breaker off unless the IC-3000 breaks down and you need it as a backup down the road.
Now for your fridge, your IC-3000 inverter turns on automatically when you connect the AC line to shore power or a generator. You cannot turn it off while it is running on the shore power line because it directly passes through AC to your power center, feeding AC power to all of your outlets in your camper, including the fridge. So yes, as long as the IC-3000 inverter is on, your fridge will receive AC power from it, which in turn, also draws power from your battery, causing it to run down. Unless you also have a good sized alternator and a DC to DC charger, your tow line power, by itself, will probably not be able to keep up with the power your inverter feeds your fridge and other outlets you have turned on in the camper, as well as charge your battery while driving. The tow line power on my vehicle was more of a trickle charge and didn’t provide a whole lot of battery charging current. I upgraded my alternator in my truck and added a Renogy 60amp DC to DC charger to my system to compensate for this. But you don’t have to do that unless you need more charging from your tow vehicle while you are driving.
So without needing that DC to DC upgrade, the quickest and easiest solution for you is to use the remote panel for your IC-3000 inverter and make sure both the inverter light and the charger light are off when you are getting ready to tow. That way your solar panels and tow line can work on recharging your battery and your fridge can run on propane. Some people worry about running the fridge on propane being a fire hazard while on the road, so temper your decision on that with good judgement and you can decide if that worries you.

The propane/electric fridge’s run on either AC power or gas. They do not run on 12v DC or batteries. So in order for you to have it kept cold by propane, you cannot let your IC-3000 inverter feed it AC that it makes from the batteries. So the inverter needs to be off unless you want to fire up the fridge on AC power. The same goes for your microwave and air conditioners. And the button on the IC-3000 remote panel will turn that off for you.
For your battery monitor, you need to get a LifePo4 battery charger and charge your batteries up all the way. Take them out of your trailer when you do this so that you know they are charged up 100%. I ordered a LiFePo4 battery charger on Amazon to do this. After you know they are charged up, hook them back up in your camper and then go to your battery monitor display and do its recalibration procedure. Look on Google if you don’t have the instruction paper for it anymore. If it works like the GoPower battery monitor, the whole process is about five button presses. It will ask you if the batteries you are connecting are at 0% or at 100% charge. Select 100% and save it. Your battery monitor will now read correctly and will match your actual charge levels of your batteries consistently.
Regarding someone telling you that half the outlets will not work, that should be wrong information. If your IC-3000 was installed following the GoPower instructions and the way I’ve described here, the IC-3000 will power all outlets in your camper. It is designed to invert on AC Leg 1 and pass through AC Leg 2 of your 50 amp shore power. So it should power every outlet that you have plugged in to your camper when on shore power, and anything on the Leg 1 side of the 50 amp breaker when you are running on inverter battery, which if still factory breakers, is everything except your second air conditioner if you have one, and “maybe” the microwave if they put that on the Leg 2 side of the breaker in your camper.
Hopefully that will get you started on the electrical frustrations. Like I said, I just went through all of this with upgrading my electrical and solar systems. Everything I upgraded is GoPower equipment except the Renogy DC to DC charger and the batteries. And that’s because GoPower didn’t have a DC to DC charger or the LiFePo4 battery setup I wanted.
GoPower’s support guys have been EXTREMELY helpful in helping me plan everything out and figure out how I wanted to hook it all together. So I’ve tried to stick with their solution as much as possible. And their warranty service has been excellent. I just had all three of my 190 watt solar panels flake out for some unknown reason and were generating 1/10th of the power they should have been. GoPower support had me measure a couple of things with my multimeter and send them the serial numbers of the panels, and they shipped me three brand new panels via FedEx the next day. No complaints on that 25 year warranty!
I have it all working pretty consistently and stable now, So if you have any questions, feel free to ask!