Thanks for your comment's. In a parallel wiring setup there is 50 amps total as you stated. In a split phase you have 2 separate 120v 50 amp lines. Unbalanced downstream loads can be an issue. I did not go into depth as how the panels are wired but they are the default wiring from the factory. All the loads are divided as well as possible between the two legs of the split phase circuit, similar as to house is wired. Yes the unbalanced load is carried back on the neutral, but this should not be an issue if the wires are gauged properly. I did not mention it yet in my videos but we did run a second 6/4 wire from the inverters to the panels in parallel with the original 6/4 wire, essentially doubling the capacity. I did this so I can wire each panel in the future separately which I have since decided not to do, at least not yet. Considering the loads are divided as they were from the factory I don't believe I have added any risk to the system even if I did not add the second wire. And you are right that some projects are not really suited for DIY, unless the person has a good understanding of the system. Not sure I have heard the term "split single phase circuits" before, but if you are referring to parallel single phase that is simply line 1 being split between line one and line 2 on the rig.

Thank you for the positive comments. You may find this link interesting as it shows how much more power you get from split Phase over Parallel. I just realized I had not included it in the description as promised in the video. Fixed that lol. Take care! kzfaq.info/get/bejne/e79_fLR4zrWYgnk.html

One last question. I'm assuming you used 2 MultiPass inverters. Were they the MultiPass-II 2 x120?

These are the Victron 3000 inverters. The Multiplus II 2x120 was just coming out at the time. It was hard to get and these inverters temporarily dropped in price by close to half as everyone wanted the new ones. Not wanting to wait and also wanting to snap them up at that price. I had the Multiplus II 2x120 on order but the waiting time was unknown and I wanted to get this project done before a 9000 mile trip. I have no regrets though, as I would have still needed two to accomplish what I wanted.

There are a lot of settings you can change with the Cerbo Gx, but unfortunately you can not connect to the inverters with your phone or laptop to switch from parallel to split phase without internet unless you connect directly with the USB cable to reprogram them.

Nice 👍Thanks for watching.

The manual switch is not required, it is just something I added. I actually had the multiplus II 2x120 on order but after a lot of research decided to go with dual 3000 multiplus inverters. When the multiplus II came out there was a huge drop in the multiplus 3k price for a very short period of time. The advantage of two inverters is 12000w of usable power where one multiplus II is 5500w I believe and only power assist on L1. I can't recall all the details, I would have to research it again but am very happy with the direction I went with no regrets. Thanks for watching and commenting.

Is there a schematic? I have a 50AMP RV, 2x3k MultiPlus II 1000Ah of batteries and it isn’t setup correctly. In split phase how does the power work off grid? I want full power form shore and to not have to decide what to run when off grid. I know I would be limited to 6k off grid but I don’t want to be limited to 3k on each leg of panel and having to figure out what is on what leg.

@@trigmish somehow I missed this comment until now. Sorry for that. You could use an victron autoformer after the two inverters to balance the loads and not have to worry about what load is on what line. I always wanted to do this but really have no issues with popping breakers at the pedestal or the inverters so I can’t justify the extra expense.

I believe Victron has an autotransformer you can run on the front end, but I have not tried it.

Not really sure as I never tried a MultiPlus II 12/3000 2x120V inverter. I assume if you run them in parallel it could work, but I can't be positive.

An autoformer could have helped but if I were to buy one of those I would put it after the inverters to share the loads between the inverters. So to use one on the front end would mean I would need two and it all works well enough already that I can not justify the expense.

I looked through my picture and unfortunately not. I do recall figuring it out with a continuity meter and it was different then I expected. I think that would be the best way to get it right.

Tough question, You will have to ask Victron about that one. They don't have a great response rate though.

Unfortunately at 30 amp one will pass through and charge and the other inverts. To have both invert they have to be independent of each other. Master/slave will not do that at 30 amp

Good point! I guess in that case you can wire it to split phase and switch to parallel in the Victron app with the mechanical switch eliminated. .

No issues here with the parallel frequency. I split L1 to both L1 and L2 in my wiring so I can guarantee L1 and L2 are exactly the same length. Issues can arise if the positive wires are even slightly different lengths. I don't care how the line is split in the box or even the 5oa to 30a conversion plug. I trust only myself in these situations.

Hello and thanks for the comment. When the system is plugged into shore power there is very little sound as the inverters are basically just passing the shore power through them. When there is sound is when the shore power is unplugged or in your case during a power outage. The higher the draw the more the inverters hum and the fans blow. Like if I am running 3 AC’s off the batteries the noise is significant. But not enough to hear it in the coach or outside with the bay door closed. Running 3 AC’s off the batteries draws them down so quickly its not realistic to do so. Also when in high amp draw situations the inverters also create heat, so they need space to breathe. In our case the cabinet the batteries and inverters are in is small but it is open to the entire basement of theRV on the left side so heat does not become an issue. I say this incase you are thinking of enclosing the setup in a small closet or cabinet. They need space to keep from getting to hot under serious loads. But if you intend to use the system for normal life other then AC or electric heat there would be very little sound or heat generated. Normal life like LED lights, the occasional microwave, coffeepot or toaster. Even with us running an LED TV or our Starlink internet we can still go a long time.

@@RVLIVINGLIFE thx u

@@MrSummitville UPS are super inneficient and cost triple. Better to have a 2 victrons with 30k lifepo4 batteries.

Interesting problem. Unfortunately I have no experience with the multi II. it does sound like a configuration issue though.

Sounds interesting, but I have no experience with those inverters

Agreed!

I never went 24v as the batteries I used were 12v and a great deal at the time, They do not allow a series/parallel setup. Only series. There are some advantages to 24v but I would only do it if I purchased 24v batteries. Your 860ah of SLA only provide 430ah of usable power. Two 460ah lithium would give you over twice what you have now and three would be over times. We are happy with 800ah, would love double that, but for what we do it is fine. We are not really BoonDockers but do enjoy running the top front AC unit on battery power when traveling so we don't have to hear the 10kw generator running while travelling.

Thanks for the reply. I ended up going with 4 Epoch 460ah batteries in a 2s2p configuration. I am doing the install next week. How did you wire your two ac distribution panels?

Hi Don, our generator is 10K. You generator can likely produce 120v 50 amp on two lines but is not wired that way to keep things simplee.

@@RVLIVINGLIFE If CowboytBiker's generator is the Onan 5.5k, it is actually 30 amp on each leg, in addition to the two legs being in phase with each other (0 degrees). Since most RV parks' shore power is split phase (180 degrees), you can have an issue with the Victron inverters only seeing one leg of the generator, resulting in one inverter running in pass-thru mode and the other one inverting. Things get more interesting if you run into a park or residential shore connection that is split phase at 60 degrees. The solution is to run the autotransformer or have multiple inverter configuration files that can be quickly loaded to the inverters.

@@AdorableDeplorable1 thanks for the info. I just did a video on swapping configuration files easily with my phone. I only showed a simple swap to change max amps from the power pedestal to keep it simple. But I swap between 30 amp and 50 amp profile’s with various charge rates and other things. It helps a lot with the wide range of power situations in various RV parks.

"Would a 30amp to 50 amp rv adaptor not do the same thing?" Yes and no. If your rig is wired in parallel, you can plug directly into a 50 amp plug for 50A120V or plug into a 30 amp plug with the 30/50 dogbone for 30A120V, If you are happy with that amount of power that is great. If you want split phase for two lines of 50A120V. Your system needs to be wired in split phase and you need to use the Victron app to set your system to split phase or parallel before you plug in. This is what I did for two years. But when you are a member of Thousand Trails there are many parks where you never really know if you are going to have a 50 amp or 30 amp pedestal until you arrive. If you have no internet then you can not switch your inverters from parallel to split phase or vice versa. So when I am in doubt. I use the app to switch to parallel, flick the switch to parallel and I am good to plug in 30 or 50 at the next park. After I have arrived and if I end up with 50 amp I can switch the software and the switch to split phase if I feel a need for more power. Some people may find this unnecessary as you can just wire your coach in split phase as I originally did, and use the Victron app when connected to the internet to switch over. But on several occasions I arrived at parks, have no internet and its crazy hot out and I cant plug in to run the AC units. Then I have to plug my laptop into the inverters and reset them to get it working. --------------------------------------- "When you're plugged into a 30amp, does the master inverter do pass through and the slave (second) inverter inverts that phase to still maintain 240v output?" I believe the master inverter operates on passthrough and charges the batteries. the slave inverts off the batteries and charges the batteries. Not 100 percent sure on that. Since the line coming in is one 30A line in single phase you can not run split phase as both lines are split from line 1 and in the same phase. ------------------------------------- "when reading the victron manual online, its seems to say if you are running 240v and plug into a single phase, you will only get 120 passthrough, but fails to mention if second inverter inverts that phase or system switches to 120 output in parallel only." If you have the inverters set to split phase and plug into 30 amp you will likely get power only on one line or get an error. Split phase expects L1 and L2 to be in opposite phases. Gary

@@RVLIVINGLIFE thanks for the reply! I asked a similar question on the Victron Facebook group as to the 30amp connected to split phase setup on the multiplus2. A guess the master will pass through the 120 and also charge the batteries. The salve with invert the 120 to opposite phase and not charge battery. Slave will only invert so you still have 220v output from the inverters. So no need to change settings. Not sure about the multiplus version 1 though. I guess the downfall would be that you only get half the charging capacity when plugged into single phase.

Yes things get hot. 100 F is not much heat though. If you mean 100 C that is much hotter. Keep the amps down and the cables short.

@@RVLIVINGLIFE Would it help to put an extra positive and negative cable? So parallel cables

@@MrSummitville I originally thought that 100 F was a lot, until I did some real testing and checking around. 100 F is well below the cables rating of 275 F max and the 250 -300 AMP rating. The people that sold me and advised me on my setup never said it was unreasonable the way I’m set up. Everything is 4/0 cable with very short (less then a foot) battery and main connect feeds. I recently put this to a pretty heavy test on a 30 AMP RV connection and it works flawlessly when the inverters assist. The most I see is 150-200 AMP continuous, and that was for under 1 hour if i was pushing it doing multiple things. The cables never got over their rated limit. In the longer term running continuously between 75 to 125 amps for 5 to 6 hours. No issues, no hot spots and no overheating. Yes i get that 24V would be more effective to keep the amps down. Part of my decision was driven because I already owned and had used the single 3000 watt Victron for sometime, then decided to convert to a parallel system once I added more Lithium. So to say “Do i want to burn my rig down” might be a statement for someone who’s system is cobbled together. Mine is not. I used the best and highest rated of everything. Everything from the length of cable to the type of crimps, bends and tightness and fit of connections.

In Phoenix, mine are 120 with nothing on.

I added the link to the description. Thank you for your interest and positive comment.

Thank you

Agreed, there is no need for the switch at all. I thought I mentioned it in the video, maybe not. I have not watched it in a while. I only did this for my own convenience when arriving at a 30 amp park when we were setup 50 (or vise versa) and there was no internet to be able to login and change it. I would then have to get the USB cable out and plug the laptop directly into the inverters to reprogram them all over again. Changing the software configuration is not possible without internet unless you connect by USB, unless I am missing something. But the the idea of the video was to show the different wiring configurations from the original to either parallel or split phase whether you wanted a switch or not. Maybe I did not make that clear enough,