I am curious to know what the OP decided? Or what did the Tech he got recommend?
If it were me...
Step 1 - Upgrade to the largest battery capacity possible for the Vegas 25.6
In my case I went with 2 12v @125ah each for total of 250ah. I could have put 2 6v batteries but they were 225ah each for total of 225ah. 3 or 4 batteries is not an option for me without taking up some space someplace else.
Step 2 - If you have 400ah then go for 2000 watt inverter otherwise a 1000 watt inverter should be adequate unless you insist on using a microwave when boondocking? I don't drink or get the coffee stuff? My wife drinks coffee at home but never when we travel. I don't touch the stuff in favor of brewed natural barley and water
Step 3 - Buy ATS and remote switch for whatever Inverter you choose. We have Magnum 1000watts
Step 4 - This should be up to your Tech guy, but our coach was prewired for Inverter circuit
- MBR has 3 receptacle on inverter one on each side of bed and in BR TV cabinet.
- Front Passenger computer station 1 outlet
- Overhead Entertainment center 1 outlet
- Main TV 40" 1 outlet ( I put extension cord on it, as it is hidden in cabinet)
- Outside Kitchen 1 outlet
- Outside TV 40" 1 outlet
- Inverter itself (lower bay)
- In slide behind stove 1 outlet used for HDMI extender to rear bedroom TV
and I just added a new line that runs from my MBR receptacle (hardwired behind TV receptacle) to the Vent area behind my Norcold fridge.
So in summary all I needed that was NOT factory was supplied inverter circuit for absorption fridge. I only want that for driving.
I don't think I would want all my circuits on that line? It would be too much to turn on or off to remember. I like the remote switch to shut off inverter when we need to. Thus far we have never come close to use the 1000 watts or 800 watts for that matter. I can run both fridges for under 500 watts.
When I get new batteries installed, I hope to get rid of the corrosion crud, water maintenance, redundant automotive battery posts (run risk of touching something and shorting or blowing fuses). I hope to gain a full day or 2 to run what we use off batteries.