48V inverter/charger selection dilemma

[Mario-THOR]

I'm trying to figure out which inverter/charger to use that has a power assist.

- I love the idea of Victron Energy MultiPlus-II 2X (MultiPlus-II 2x120 V 24/3000/70-50)as it seems to be the gold standard, however, they don't make 48v units (only 12v & 24V) and they're limited to 3000VA, which is actually only 2,200-2,400W of usable load.
- I looked at the Quatro 48/5000/70-100/100 120V, and I believe that with somewhat careful management, I can run at least 1 AC unit with the usable 3,700-4,000W that the unit will deliver. But, they don't have 2x120 version. I don't need 240v. I understand that there are ways around it, but I'm trying to see if I can find a manufactured solution.



I'm just not finding anything that has power assist in the 48v and 5,000-ish watt capacity.

Because we're still working, we only get to use the RV a few times a year in the hot southwest.
Our vacation time is limited to only 3-4 days, and it seems like we spend 2 days driving and only 1 day resting before we start the drive back.
Right now, we run the generator to power the ACs and the TV that my wife enjoys while I drive.
Once at the primitive destination, I would like to be able to shut off the generator and keep the AC and TV running for a few hours.

While the RV is solar-ready, I don't plan on any solar panels at the moment because looking at how we used the RV historically, it seemed like we've always managed to park under trees.
I understand that I will need to use the generator to charge the batteries and use the ACs.

The goal is to start with DIY 16s 314ah LiFePo4 setup with either 150a or 200a JK BMS, and add more as funds allow.



I have a Thor ACE 32.1 RV with 50amp shore power input and an Onan 5500 generator (outputting 120VAC, 46amps with 2x30amp breakers).

The RV came with 2x Airxcel 48253C969 13.5k Air Conditioning units, each consuming ~2,000W.
RV only uses 120vac loads but is configured in a split system due to the total amperage.

Sources:
https://www.victronenergy.com/upload/documents/Datasheet-MultiPlus-II-3kVA-2x120V-EN.pdf
https://www.victronenergy.com/upload/documents/Datasheet-Quattro-3-10kVA-120V-EN.pdf

 

[macdaddy1111]

I have 48v mutiplex victron inverter sitting at my house to replace my current 12v mutiplex when we return from Florida. Can't run 2 acs off batteries, smokes my 400 amp fuse. Why upgrading to 48v. Will run one AC just fine.

Victron inverters rock!

 

[ducksface]

Xantrex sw series will stack allowing two inverters to act as one.
Find a 48v that stacks and buy two.

I believe, and am often wrong, that the 48v allows for smaller wiring and has little other real world advantage.

What's the advantage?

 

[macdaddy1111]

Xantrex sw series will stack allowing two inverters to act as one.
Find a 48v that stacks and buy two.

I believe, and am often wrong, that the 48v allows for smaller wiring and has little other real world advantage.

What's the advantage?

Heat! Power efficiency and you correct,, copper size!

I have tossed so many Xantrex that lost their smoke!

I have 1/2 dozen Xantrex 2ks, u need one?

Done close to 100 conversion to victron systems and have never had a failure.

 

[Mario-THOR]

I have 48v mutiplex victron inverter sitting at my house to replace my current 12v mutiplex when we return from Florida. Can't run 2 acs off batteries, smokes my 400 amp fuse. Why upgrading to 48v. Will run one AC just fine.

Victron inverters rock!

Which 48v model did you go with?
Do you have a 50amp service on your rig?

 

[Mario-THOR]

Xantrex sw series will stack allowing two inverters to act as one.
Find a 48v that stacks and buy two.

I believe, and am often wrong, that the 48v allows for smaller wiring and has little other real world advantage.

What's the advantage?

I don't want to waste the space and weight with 2 units.
This design is not unique. If anything, it should be a standard build for any rig with 50amp shore power connection.

 

[ducksface]

An sw815-3012 is not the little xantrex unit.
If my burns out and you can recommend one that adds to shore power from the battery without me being involved...I'll buy it.
I have no brand loyalties.

I'm not sure 67lbs and a cubic foot should have an issue on an rv the size of the op.
Is this one of those silly rv's that are overweight before you add passengers?

 

[macdaddy1111]

Which 48v model did you go with?
Do you have a 50amp service on your rig?

50 amp rig. 2k solar and 1.6k amp hours of lithium.

I can boondoggle until i run out of beer, water and dump tanks!

 

[Mario-THOR]

An sw815-3012 is not the little xantrex unit.
If my burns out and you can recommend one that adds to shore power from the battery without me being involved...I'll buy it.
I have no brand loyalties.

I'm not sure 67lbs and a cubic foot should have an issue on an rv the size of the op.
Is this one of those silly rv's that are overweight before you add passengers?

Please explain to me how this makes any sense.
It literally does NOT address a single point or feature I asked for.

Not only that, but it's much, much more expensive than a more capable Victron.
I'm actually surprised this even exists as I can't see anyone buying it based on current competing models.
I have no brand loyalty either.

 

[ducksface]

I don't want to waste the space and weight with 2 units.

Was your answer.
Not cost, not function, not how would I make that work(easily).

My answer was solely a question of this reasoning that you haven't room nor weight allowance
and
to ascertain that the 2000w+- compromise of an inverter product line is the xantrex that was disparaged, and not the xantrex I was speaking of.

So,
Weight and a cubic foot is your issue...or cost and installation?

Please see my initial advice and sole advice to you of;
'Find a 48v inverter that stacks, and buy two.'

All the other ideas and information required extrapolation as they are examples designed to seed a tree of thought process.

 

[Scubawise]

Xantrex sw series will stack allowing two inverters to act as one.
Find a 48v that stacks and buy two.

I believe, and am often wrong, that the 48v allows for smaller wiring and has little other real world advantage.

What's the advantage?

You are NOT often wrong..


"Often we won't make decisions about what is good, nourishing or important to us because we are worried about how other people might feel. So instead we “set ourselves on fire to keep other people warm”. We allow other people's issues to determine our actions and life choices."

 

[Mario-THOR]

50 amp rig. 2k solar and 1.6k amp hours of lithium.

I can boondoggle until i run out of beer, water and dump tanks!

I think I'm going to roll with the 48/5000/70-95 model.
It doesn't do the split voltage, but that's the only think I would be missing.

 

[Aaron11]

It sounds like the Victron 48/5000 could be a solid choice compact, and enough power for your needs without the hassle of a split system.

 

[Mario-THOR]

I gave it more thought and some calculations and decided that the 48/5000 Victron is the right decision for my setup.

Here is what sealed the deal.

My Onan 5500 generator outputs a maximum of 46 amps at 120 VAC and will power everything in our rig, including both AC units, microwave, and TVs.
That means that I can take a single leg of shore's power 50amp split phase and still be good.
All I have to do is tie both sides of the generator to the single side of the 'split' system.
It also means that I could wire most regular loads, one of the ACs on Output1 and the 2nd AC on Output2.
Output2 is only active when AC Input is active, meaning generator or shore power.
That way, I'm not overtaxing the inverter and the batteries.

 

[16ACE27]

I gave it more thought and some calculations and decided that the 48/5000 Victron is the right decision for my setup.

Here is what sealed the deal.

My Onan 5500 generator outputs a maximum of 46 amps at 120 VAC and will power everything in our rig, including both AC units, microwave, and TVs.
That means that I can take a single leg of shore's power 50amp split phase and still be good.
All I have to do is tie both sides of the generator to the single side of the 'split' system.
It also means that I could wire most regular loads, one of the ACs on Output1 and the 2nd AC on Output2.
Output2 is only active when AC Input is active, meaning generator or shore power.
That way, I'm not overtaxing the inverter and the batteries.

Just jumping in here.

Most 5500 generators are not split phase and have two output breakers; 20 and 30 amp, that go through the ATS to the power center's Leg 1 and Leg 2. You may want to do the same with your inverter.

 

[Mario-THOR]

Just jumping in here.

Most 5500 generators are not split phase and have two output breakers; 20 and 30 amp, that go through the ATS to the power center's Leg 1 and Leg 2. You may want to do the same with your inverter.

Yup. I wish this inverter had dual 120 inputs like the baby 12/3000 2x120 units.
Since this one doesn't, I'll tie both legs of the generator and get the full 48amps, vs the 2x30amps that is limited by the generator's breakers.


https://liveshareeast3.seismic.com/i/QkthrmWPLUSSIGNCiBD658___O4ux6BrNhRNEI2IUHkO0gghv9mwHmx3NPLUSSIGNDEaNLoRXVlJajNG___ixTM5NHjwJoXsy6YQMv3BpeBta7pLnP5ZcxaLDqBox82dvibvlLhKo4iexM___UbI

 

[macdaddy1111]

You are making a 300ah hour 48volt battery?

Where did you get ac's pull 2k? I have 15k ACs and they pull about 1400 watts?

Where you going to install a 65lb invertrer? I have 38ft rig and was some work to find a spot to install 3k inverter

 

[ducksface]

Mine 67lb'r is under the sink.
In front of the outside TV and behind the drawers, nxt to the entrance steps.
There's room for a second one in there if I decide 6kw continuous is needed(it won't be).
If you pulled all the drawers completely out of the cabinet you still might not notice it.
You have 14+ more feet to work with than I.


Inventiveness
Is
The
Mother
Of
Invention

Short story;
Amazon had a glitch five-ish years ago and a bunch of companies put up higher priced items with(if I'm remembering correctly) two decimals in the price.
So,
A $10,000.00 camera lens became a $10.000.00 lens.
Some companies honored the mistake.

I didn't make the company I bought four sw3012's from for
$1,97.370each instead of $1,937.00
Send me the units.

 

[Mario-THOR]

You are making a 300ah hour 48volt battery?

Where did you get ac's pull 2k? I have 15k ACs and they pull about 1400 watts?

Where you going to install a 65lb invertrer? I have 38ft rig and was some work to find a spot to install 3k inverter

Yes, on batteries. Using 16x MB31, which is 314ah.

As for draw, the data plate shows 17.6amps running. Something crazy at startup, but I'll get the soft start for that. I have 2x13.5k units, the occasional microwave and the TV in the bedroom is almost always on.

As for location of the inverter, I'm going to try to do something in the current battery compartment. If that doesn't work, under the couch, where the batteries are going to go.