How is the DC current consumption in idle mode of Multiplus-II?

I have a Multiplus-II 10000kva, 4x BYD batteries (400ah), RS450/100, Cerbo GX.
All devices are on the latest firmware.
ESS is activated with all VEConfig settings done as per Victron/BYD specifications.
Grid feed-in is off, grid setpoint is currently at 200W.
I'm in South Africa, Cape Town.
This is a new installation (1 week old).

About once a day when AC Input is connected, I get an "Overload L1" warning, and from inspecting VRM it appears to coincide with negative amps reported on the AC Input. This normally results in swings in the AC Input current between positive and negative Amps. At the same time the Multiplus's state changes to passthrough, even though there is ample battery and PV available to handle the AC Output load. In the example below the AC Output load was only about 500W when the Overload warning came up.

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In the example above, the system returned back to normal operation on its own, but I've had other cases where this happened where the AC swings from negative to positive continued and seemed to get worse, resulting in loud noises from the multiplus and lights flickering in my house. When this happens, I disconnect AC Input, and the system then becomes stable immediately. When I then reconnect AC Input, the system typically behaves fine again.

Does anyone know what could be causing this behaviour ?

Hello, what I need to visual the current and frequency?

I want to see on VRM / Touch 70 a few data's.

AC In from Shore/Generator to my Skylla Charger.

AC Out from my Phoenix Inverter.

Skylla I is connected with VE.CAN with the Cerbo.

Phoenix Smart is connected with VE.Direct with the Cerbo.

And is there any Tile in GUI to visual this without a Multi/Quattro?

Here is an example what I want to see, but without a Multi/Quattro.

Best regards Robert

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And here is my Touch 70

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Hi I have a cerbo gx and 4 et112. Meters connected to it and I set all them up having one set as grid meter one set as generator meter and 2 for 2 separate inverter outputs. However even after setting one of the meters as a grid meter it shows no ac input but only shows it as ac loads. Is there something wrong with my cerbo gx or will the et112 not show as ac input because I would have to have a victron inverter?

On my Multiplus 48V 3000VA 35amp(charger), It no longer shows the AC input watts. It just shows 0 watts when connected to shore power. If I disconnect shore power it shows a dash(-) for AC input, so I know the inverter knows the shore power is connected.

It also does not shows any watts for AC load when shore is connected. When I disconnect shore power it will shows the load watts.

I can see on my generator screen and 48V battery screen that it is drawing lots of watts from shore and charging the battery. (See screenshots.)

This is a new install. It was all working initially, then when I checked again in about 30 minutes, the AC loads and Input where both showing zero. I had a constant 1400Watts draw on the inverter the whole time.

My inverter was on V501 and the Cerbo 2.92. I updated the cerbo GX to 2.93 and the multiplus to V502. Same issue persisted.

This is what it looked like with a constant 1400watt heater running off the inverter and the shore power connect to the generator. ( I know it says last updated 4 minutes ago, but it looked the same even when that said "realtime", the cerbo gx was updating when I took the screenshot. It showed 0 still after the update and it showed "realtime" again.)

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Here is my generator screen showing the watts supplied to the multiplus at the same time the screenshot above was showing 0. It is an inverter generator that provides pure sine power.

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Hello,

I'm new in victron product and i've seen so far in all videos a jack port for the current sensing.

I got only terminals, is that normal ? Does it mean I have to cut the jack connector of my sensor ?

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Thanks for support

My Multiplus ii unit does not have 4 AC-in connection ports, only has N, PE, L.

My understanding is that 50amp power has two hot legs L1 and L2. The manual even states that there should be 4 connection units in the 'AC-in' area.

How can this unit still get 50amps of AC-input?

What am I missing? Purchased the unit in Canada from a local supplier.

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We work in Congo, Africa, and receive 3 phase 220Vac from the grid. However, due to the constant and lengthy power outages, I'd like to run my single phase 220Vac Multiplus off of a backup generator. Unfortunately, the generator provides "split phase" 220Vac as what you would find at the outlet of a drier in the U.S. The inverter refuses to recognize the input and has a bottom input threshold of 180Vac, blocking me from using it in its current configuration or from using one 110Vac leg of the generator output to power it. Here in a remote jungle village, we always have to improvise, so I am looking for a solution, understanding that it might not follow normal practice or meet "code". Thanks for the help

I’m planning the following setup. 4 x 380w panel in series of 2 connected to 2 different mppt 100/20. The output of each charge controller will end up on two different common bus bars, one for positive and one for negative. From here I would like to connect battery and inverter on the same bus bars. I need 2 charge controller because panels will be orientated in different directions to have a constant solar input. My question is: is there any danger of reverse current if one charge controller is giving max output eg. 20A and one is shaded, giving zero? If not, any problem if for some reason BMS cuts the battery and one of the charge controller is providing current and one other not? Also, I’m planning to charge the battery from this same common bus bars from AC via the inverter. Is there any danger of reverse current into the charge controllers if I start charging with the inverter via the bus bars to the battery, when charge controllers have no tension or current from the pv? Hopefully I explained myself, thanks in advance

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Hi!

I just installed my Multiplus-II's current transformers for each phase and now it shows for L1 and L2 a negative AC-IN. I have ESS and grid feed in is disabled and I dont have solar power coming. How can I have those numbers be positive?

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Also Remote Console shows different AC-OUT.

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What can I do? Do I need to buy grid meter?

Thanks!

Hi.

I am trying to workout the rating for the supply cable and shoreline plug socket for the Multiplus II 24/5000. The maximum input rating is said to be 50 Amps and maximum charging current of 120 Amps. What i do not understand is what is the normal current draw on the shoreline power supply. Will the charge current always be 50 Amps? Unlikely.

My currently supply MCB is at 24Amps. My batteries are 225 AH at 24 V.

Do i need a supply cable rated to 50 Amps?

Do i need to use the Victron 64 Amp inlet socket and galvanic isolator.

Thank you for any help on this.

Sean

I am getting ready to install a Victron Multi Plus 3K unit. I am using the current transfer switch for the shore vs generator power on a Winnebago Travato. The MultiPlus specifies the use of a magnetic or fuse breaker on the AC input side. Do I still install a breaker between the transfer switch and AC input or will the ATS provide the necessary protection? This is a 30 amp system.

Dear all,

Where can i find the documentation of the external current sensor of the multiplus?

what functions does it has or how it works exactly?

when i set my current limiter to 35A in the multiplus ii and place an external current sensor.

can the multiplus ii draw 45A?

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*yea i know i should change the picture of the multiplus to a multiplus ii :D

System:

Quattro 120v/5000/24v running ESS (custom grid code).

10 Kw LiFe storage

7 Kw genset

Variable shore power options.

When AC input limit is 25A or greater, everything works as expected, with loads running off incoming AC, up to the limit, and any difference coming from batteries, until SOC limit. Perfect.

When it’s anything less than ~25A, it seems, the Quattro loses its mind and basically ignores that setting, or goes bonkers switching back and forth and back again between the battery and whatever the input source —often to the detriment of the input source.

Example 1:

Using a generator, setting the input limit below 25A essentially causes the generator to detect a fault on the line and eventually shutdown —right before constantly oscillating up and down trying to keep up with the inverter.

Initially, I just ignored this issue and wrote it off as a “weird” compatibility issue between an inverter genset and the Quattro. There are copious posts about “syncing” issues with inverter generators and these inverters.

Example 2:

A 20A 120v “mooch docking” option was made available (instead of a generator). This was intended to act as a constant drip of AC, at a very low draw, with the smart Victron inverter in between handling the balance.

Set input limit to 10A.

Utterly ignored. Everything was coming in from the “shore” plug, regardless. But, at least it was stable in its ignoring the limit.

Then, I figured out that SOC was below set-limit, so that made sense. It was essentially running in pass-thru mode. So, I adjusted the SOC limit to well below battery’s current SOC. This should allow it to make up any deficit from the batteries (which had plenty of capacity remaining).

That’s when things got even more weird. Being allowed to actually draw from the battery caused the same ping-pong effect I described in example one above, with the Quattro constantly swinging wildly on input power and battery draw, and then eventually it fully exceed not just the 10A limit I set, but the full 20A limit of the plug, and blew the breaker.

So, I’m confused as to what to expect from that input limit. It seems to be essentially worthless below 25A —even though the UI very clearly lets one set it that low.

And not only that, but it seems to make things considerably worse for the input line, whether that’s a genset or (otherwise stable voltage) input from shore power.

I have this 9000w genset and I'm having a hard time figuring out how many amps it is able to output while charging my system. It can output 120v or 240v.

What math I'm using is this so far but it's such a big genset, it must be able to output more than 60a???

9000w - 20% inefficiency = 7200w
My multiplus 24v/3000w/70-50 is 120v so the math should be 7200w/120v = 60a output.

Is that correct?

Right now I'm charging and I can see that my system seems to only be accepting 20a from the genset while charging! What? How can I fix this so I can get more charge into my bank in less time and gas spent?

Help!

STEPS I HAVE TAKEN:

Following this document by Victron, I have:

Deactivated Power Assist in the VE.Config
Changed the AC Input Current Limit to 31a based on their equation below:

(a 5kVA generator typically provides about 4 kW
80% of 4 kW is 3200 W
3200 W / 230 V volts = 13.9 A
Set the AC Current Input Limit to 13 A)

Mine looks like 9000w - 20% as above = 7200w / 120v = 31a

But I'm not seeing anything different at all.

PS: Please ignore the "stopped" in the genset info. I don't have it set to auto start/stop yet so everytime I manually start a charge, it still reports it as stopped on the VRM.

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