I just ordered a 50 amp 5th wheel that has no inverter at all in it currently. However it does have inverter prep which is a 30 amp romex to and from the breaker panel to run just outlets I think.
Anyhow my plan is to start with a single 3000va this year then in a year or two add a second one. There are several different models to choose from and I am not sure which to go with considering I am starting with just one.
There is the Multiplus 24/3000
the MultiplusII 24/3000
Or The 2x120 Victron Energy MultiPlus-II - Power Inverter - 2X Pure Sine Wave Inverter Charger for 70 amp Battery - with PowerAssist Technology
All about the same price but more concerned about starting with the wrong unit for what I want to do.
No 240 ac loads, no generator and starting battery bank will be my 2 X 280ah 24 volt packs
So I assume you are converting to 12V from the 24V battery bank. I know there’s a lot of talk about the benefits of 24V out there but realize you will have consistent losses from converting 24-12V for the life of the system. In my opinion this outweighs the benefits of going 24V on the battery bank. If you were building a system from scratch and could make most of it AC that would be different. Anyway, I know that’s not your question but thought I would chime in.
If you are looking at just using the 30amp inverter prep for now just get whatever 3000VA mutliplus fits the best in your location. Sometimes the Multiplus II fits better. Sometimes the standard Multi.
Either one can be paralleled with another of the same in the future.
Pretty sure a single 3KVA is about all you can do with the 30A prep.
Depends on how deep you want to get, and what you want out of it. We have a 2x120 24V in our 50A coach, love it. It took a bit of rewiring to remove the old 30A for the new 50A. Ours is wired after the shore/gen transfer switch, before the breaker panel and it powers the whole show when we’re off shore. It does take a bit of proactive energy management to prevent overloads from the water heater and rooftop A/Cs. I have that mostly automated now.
For us 24V made sense because the alternator needs DC/DC protection, and the solar MPPTs will handle double the panel wattage for the same amp rating on 24V. Just adding a DC/DC to prop up a small AGM buffer battery for house loads & hydraulic pump completed it. You do lose a bit on the 12V conversions but most of the power flows on the 24V side, inverter/charger and solar. House loads are LED lights & fans, we rarely use alternator charging…or the generator.
If you want to keep tabs on your system, check out the smart shunt & Cerbo GX.