Inverters/All-in-ones that can compete with Victron Powerassist

I'm selecting an inverter for my 50A/240V RV, and I have been leaning toward the Victron Multiplus-II, but I have hesitated to purchase it because I want a 48V battery/solar setup.

Today, when viewing Will's video about the EG4 All-in-One, he pulled too much current while recharging after discharge. I realized that if that unit is able to offer current limiting and something similar to the powerassist function that Victron offers. Then it plus a phase selector switch would give me what I want for less than half the cost of a Multiplus-II.

Reading the EG4 datasheet, it doesn't seem to offer a current limit or the ability to boost the power available using the battery (unless I overlooked something). But I am now wondering if there are other units out there that can offer that function.

Just for reference, the Powerassist function in Victron's words:
MultiPlus-II will prevent overload of a limited AC source, such as a generator or shore power connection. First, battery charging will automatically be reduced when otherwise an overload would occur. The second level will boost the output of a generator or shore side supply with power taken from the battery.

Why do you want a 48 volt system?
Your trailer isn't 240 volt. It's split phase 120 volt. (Most likely unless you have some oddball custom setup)

If you have other Victron equipment, the Multiplus will fit right in and the ability to regulate the entire system through a single interface (Victron Connect) is nice.

AFAIK power assist is a killer feature and unique to Victron.

I would like a 48v system to allow a large scale solar array and to (more conveniently) allow longer DC connections with multiple battery banks (I plan to locate 2 battery banks 25 feet apart).

And yes, its split phase 120v.

liveaxle said:

I would like a 48v system to allow a large scale solar array and to (more conveniently) allow longer DC connections with multiple battery banks (I plan to locate 2 battery banks 25 feet apart).

And yes, its split phase 120v.

Click to expand...

The really new RVs have split phase 120's. Some do have 240 for the dryer. It's still rather a rare thing.

HRTKD said:

Why do you want a 48 volt system?
Your trailer isn't 240 volt. It's split phase 120 volt. (Most likely unless you have some oddball custom setup)

If you have other Victron equipment, the Multiplus will fit right in and the ability to regulate the entire system through a single interface (Victron Connect) is nice.

Click to expand...

Interesting.. theoretically it's just bonding with the line and grid tying, no? You have a set point for the line (say 10a) and then anything in excess the system takes inverter power and grid ties it.. fascinating and wonderful

I like my MultiplusII 48/3000, but it doesn't have split phase in a single unit--it's a little cheaper?

What kind of loads do you run on split phase exactly? I have a full size washer/dryer (propane), they work fine, no split phase.

If you build a large system on 12V, you better get your amp handling right, nobody is going to come fix it for you if your lithium circuit breakers reset, etc. I've seen a few posts with people buying server rack batteries and a 12V multiplusII, then being disappointed when the 100amp battery circuit breakers constantly blow because they have to spread the load across so many cells flawlessly to run large loads.

madmax said:

The really new RVs have split phase 120's. Some do have 240 for the dryer. It's still rather a rare thing.

Click to expand...

Running a Victron MultiplusII/48 is worth a little AC rewiring and a dryer replacement

It's not just the inverter that's cool, it's the inverter+smartBMV+RaspberryPi4/VenusOS/VRM Online monitoring interface that's awesome... And a higher quality inverter is also nice to have, it handles surges pretty well.

Even if I build some super cheap systems in the future, I'm seriously considering using a victron smartshunt+raspberry pi for graphing battery SoC/voltage/amps. It's worth the money!

That said, I'm drinking the koolaid so hard that I'm going to need to replace my outback solar charge controllers with victron so that my VRM displays look better VRM only shows power coming from batteries or generator on my consumption screens (dashboard), not when it comes in directly from a solar charge controller. Of course, there's a "DC Power" graph in the advanced screens that really know how much power is coming in from "other" DC items, but they don't let you designate that as solar input apparently. Their ecosystem would allow me to make my own integrated solutions that don't have that shortcoming also.