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current limit

Multiplus 5000/24V Input current limit control assistant in combination with Cerbo

I have a Multiplus 5000/24V in combination with 3 x 24V/160AH LiFePO4 batteries. There are three sources which can be used for charging the batteries, shore power and two generators. One is 18KVA, the other 3.5KVA. When the 3.5KVA is being used the Multiplus has to be limited to use a maximum of 10A.

This system has also a Gerbo GX which is connected to the multiplus via the VE.bus for remote monitoring.

To limit the input current what would be the best solution, use a digital input on the Cerbo GX which will in turn set the input current limit. Or use the "input current limit control" assistant directly on the multiplus?

absolute asked
Daniël Boekel (Victron Energy Staff) answered ·

2 Answers

Maximum discharge current (initial current)??

Hallo people

If i have a 230 Ah agm battery wich mentions "initial current" 46 A, what does that mean exactly? For example:

I want 2 of this batteries parallel connected to a multiplus 12-2000. But if i connect like for example a watercooker from 1600 watt i allreafy excel that current by around 30 amps (15 amps per battery)

What battery i need connect then to not exceed the "initial" current?

Or this means somethibg else?

Thanks all!

heinzie asked
heinzie commented ·

2 Answers

MPPT 100/20-48V maximum load current 100mA???

I am looking at using the MPPT 100/20-48V but I noticed that the manual specifies a maximum load current of 100mA for a battery voltage of 36-48V. For 12V and 24V it is 20A.

I cannot imagine why there would be such a difference, and how the unit can be useful at 36V or 48V, with only 100mA of available load current. Unless you are simply not supposed to use the load output in this mode.

Can anyone shed some light on this question?

eamon asked
jamesinwa answered ·

4 Answers

No current management between MPPT / BMV?


i use a MPPT 100/50 and a BMV712 with 1,3kWp offgrid (oversized because of winter). The charger and bmv are connected via VE.Smart Networking. My MPPT output is limited to the maximum allowed battery current.

I also use energy in my regular system while charging. The bmv seems not to communicate the real charging current to the MPPT to regulate the maximum power output. So in sunny days i can´t use the full power of my pv for my phoenix ac converter because of this limitation.

Why isn´t this implemented or why is this a problem?

mikeymike asked
Stefanie answered ·

1 Answer

Is DMC GX still required for systems with Ve.Bus BMS for changing input current limiter?

Is the DMC GX still required for systems with a Ve.Bus BMS for changing the input current limiter?

The CCGX manual suggests that the DMC GX is still required if you have a Ve.Bus BMS:


Are the current limit settings, which are now present in the CCGX, sufficient for for controlling input currents in systems with Ve.Bus BMS batteries without the need of a DMC GX?


Thank you,

natebert asked
brent1982 edited ·

2 Answers

AC Current Limit when using ESS as a grid parallel system

I have a Multiplus II GX system which is installed with the ESS application. It's connected to the UK grid via a single phase 100A supply, connected to AC IN of the Multiplus.

All loads and an AC coupled solar inverter are also connected to AC IN of the Multiplus.

The Multiplus is able to balance the grid supply close to zero, charging the batteries off of solar and discharging them as required. I also have time of use tariff which enables the Multiplus to charge the batteries over night.

The issue I have is that I run a lot of loads over night in the cheap period of my tariff including a 32A electric car charger. This regularly take my load over 50A.

The Multiplus needlessly regulates its own charger down in this period and on occasion supplements my grid supply from batteries. This is needless and results in me not having a full battery bank at the end of the cheap time-of-use period.

I can't increase the current limit beyond 50A on the Multiplus or seem to disable it. It is not needed in a parallel grid connection as I have it, as far as I can see.

Can somebody advise me as to whether I have missed a setting or if this is something Victron need to consider in a future firmware update. I want to be able to heat my water, charge my car, batter bank, run my dish and clothes washers during my off peak period!

Marcus Fosker asked
elel commented ·

3 Answers

Input Current Limit MultiPlus-II

Hi all,

I am wondering if anyone knows what happens when I:

  • disable PowerAssist (it has to be disabled so the Input Current Limit can be lower than 3.9A for a Multi)
  • set the Input current limit of a MultiPlus to say 2A
  • switch on a 10A load on the AC-out

I'm looking into ways to dynamically adjust the power take from an external power source between "as low as possible (0A would be great, but 1A will do too)" to 20A.

Would the MultiPlus supply 8A from the batteries and 2A from it AC-in in my example above? Or would it trip with an overload?


jbakuwel asked
jbakuwel commented ·

2 Answers

Cerbo GX relay #2 current

My Cerbo is fitted in a van, with some exterior lights. These lights are connected to 4 relays that control each of the sides of the van. With an internal screen, I can send 12V to activate the relays and light on the lights.

My question is if I can put a +12V to the common port on the #2 realy of the cerbo, and the connect the cerbo to the same internal screen, to activate the lights from the Cerbo. Will the Cerbo have a problem if the current from the other screen goes to his #2 realy? Do I need a diode or something in the middle?



llubi asked
llubi commented ·

1 Answer

Multiplus 24/3000 violates input current limit settings

How do I prevent the MP from exceeding the input current limit settings?


Stephen Otto asked
88benjy88 answered ·

1 Answer

Charging current advice needed


I have a BlueSolar MPPT 100/30 charger and 2 used car batteries (12V, 60Ah), Varta, no maintenance needed (sealed), which I want to put in series so I can have a 24V system.

I see in VictronConnect that I can set the charging current .. but what value should I put there to be safe?

I plan in using the batteries mostly as a buffer system (a 24V, 300W pump is running to move the water from a deep well to a water tank).

Thank you!

sorin-t asked
sorin-t commented ·

1 Answer

Product request - Smart BMS CL 24/100

Lately we have many requests for installing big RVs with big 24V alternators (100A or more) and also more than 400Ah or more of lithium batteries.

With lithium batteries you should use a DCDC-charger but if you want to (or have to) charge the batteries from the alternator as fast as possible you have to install 2, 3 or more Orion-TR Smart or use 2 BuckBoost 100A (which is way to expensive).

So it would be great to have an easy way to limit the current like it is possible in 12V vehicles with the Smart BMS CL 12/100.

Matthias Lange - DE asked

0 Answers

Limiting current for campsite hookup

Hi all,

I would like to buy a Blue Smart IP22 Charger for my VW T5. It has 2 leisure batteries in it (under the front seats). My question is regarding plugging in the van when at UK campsites.

The campsites will limit the amount of current that can be drawn though a hookup (sometimes 10A, sometimes 16A). If I go for the 15A Blue Smart charger, could it trip out the campsite supply when I plug it in? And if it does, will LOW mode help to prevent it?

Thanks in advance.

northerncamper asked
harold commented ·

2 Answers

CCGX: Current limit only 15.5?

I have a Color Control GX controlling two MultiPlus 24/3000/70s in VE.Bus single-phase. When I try to dial down the input current limit, it only goes as low as 15.5 do I get it lower? Do I need to do something in VE.Configure? I notice for each individual inverter lets me go as low as 6. I've read something about PowerAssist limiting how low a VE.Bus setup can go, how do I configure that?

malcolmdmoore asked
malcolmdmoore commented ·

1 Answer

BMS 12/200 as current limiter with alternator control cable (ASS 030510100)


I am trying to protect my alternators while charging lithium batteries. I have seen this document:

This states that if using the mentioned cable the BMS 12/200 can be used as a current limiter. in this video: it is mentioned that up to 200A can be used.

I do not have the VE.Bus unit. Can anyone explain to me what voltage or signal that is supposed to be sent through the mentioned cable. It looks like the red wire is 12V + , but what is to be sent through the yellow cable, connected to the charge disconnect port of the VE.Bus.

Thank you.


didrik asked
chezgals edited ·

1 Answer

How to limit the current in a 48V alternator?

For a project the customer has a 48V 150A alternator.

I recommended, the following solution


As the Cyrix at 48V only allows 80 A, can I put two in parallel?



The ideal to protect the alternator would be to have a current limiter. Unfortunately, victron only has current limiters for 12 and 24V.

Does anyone have a suggestion for a better 48V solution?

bite asked
marijn-achterkamp commented ·

4 Answers

Control maximal Charge Current from SmartSolar MPPT 150/85 with BMV 712

Dear Victron,

I have installed an oversize PV System in relation to the battery in my car (Old VW T2), which I use to demonstrate PV opportunities in Indonesian rural areas. ( All installation is private financed by us and we try to promote renewable energy to rural places in Indonesia without any payback. But step by step the local media ask us for interviews and talks in the television and we start our blog in Indonesian on YouTube :D

1. The Panels can produce 1,16 kWp under STC. Size was chosen based on the maximal allowed space on the roof.

2. SmartSolar MPPT 150/85 charge my battery with an additional SmartBatterySense and BatteryProtect BP-100.

3. Just one Luminious SMF 12V 200h is installed due to weight and lack of space (I know this is not ideal, but it is an old car and 69 kg for each battery is just really heavy)

4. SUOER FPC D1000A Pure Sinus Wave Inverter (1000W continuous power/2000W peak power)

To increase the maximal life-cycle of the battery under tropical high temperature I reduce the maximal charge current to C10, which means 20A. When I demonstrate it to the people I put some big load to my Pure Sinus Wave Inverter. Since my PV System can easily produce more than 80 A on the 12V site at daylight, I need a device which can change the maximal charge current depends from the load.

The BMV 712 can easily read the current and direction of the current which going in and out of the battery and it can be easily connected via Bluetooth to the other devices.

Is there a possibility to drive the MPPT from the SmartSolar MPPT 150/85 with the measured current from BMV 712 so that the net current to the battery is limited to 20 A?

Or is there another device which can do this which is available in Indonesia, because Victron parts I bring directly from Germany? I didn't buy the BMV on those time due to lack of money, but now because of the response and the interest I need a solution.

It is so great to see the people step by step understanding renewable energy and with my background as a physicist i can explain them a lot :D

I am really happy for any advices or helps.

Thank very much.

Best regards,


pvwkombiwanderer asked
JohnC answered ·

6 Answers

SmartSolar MPPT 100/20 turning the load "On" then "Off" then back "On".

I purchased a Victron SmartSolar MPPT 100/20 Charge Controller. I am having a problem with the charge controller cycling the load "On" then "Off" then back "On".

Description of failure:

1. The charge controller will show that the load is set to "On".

2. A 12v fan is connected that draws a max of 9W of power or a car cell phone charger is plugged in (without the phone connected or charging)

3. The charger controller will show that the load is turned to "Off"

4. Have a pause for 1 to 2 seconds

5. The load will then be turned to "On"

Notes: The charge controller never shows a voltage below 12.6 volts from the battery so I know that it is not pulling a large load from the battery.

I don't see how a 12v phone charger without a phone connected could be tripping the 20A capacity of the controller.

sailboattn asked
tomvacek commented ·

2 Answers

Pylontech Charge Current Limit

I have 3 Pylontech US2000 Plus connected in parallel with a MultiPlus 48/3000/35 and a MPPT 150/45.

The CCL is set at 30A by the battery, is this because the MultiPlus can only charge with 35A and the battery knows this? I haven't connected the PV panels yet but when I do should I see this value raise to 75A as the MPPT can provide an extra 45A?

The DCL is set to 75A so I'm assuming that all 3 batteries are being detected and everything in the setup is fine. Any comments welcome please and thank you.


spudgun asked
lucode answered ·

4 Answers

Feature Request - Set MPPT max current value in 0.5A steps or decimal value

I can set the max current value of my 75/10 MPPT in VictronConnect for Windows to a whole number only, but I would like to set it to a decimal value e.g. 2.5A. Can I do this somehow or could it be implemented in a future release?

Especially batteries with lower charging rates need at least .5A steps for efficient loading with bigger(ish) panels while not charging with overrated current.

deltron asked
deltron edited ·

0 Answers

Limit the EasySolar discharge current?
Is it possible to limit the discharge current of the battery on my Easy_Solar?

The setting in the ESS menu Limit inverter output does not work because it limits the total output of the battery + PV yield.
My battery is no longer 100% OK and if the current is too high it breaks down (4X12V-150AH)

There are no problems with lower discharge currents.
Besteht die Möglichkeit, bei meinem Easy_Solar den Entladestrom der Batterie zu begrenzen.

Die Einstellung im ESS-Menü Wechselrichter-Leistung begrenzen, funktioniert nicht, denn sie begrenzt die Gesamtleistung Batterie+PV Ertrag.
Meine Batterie ist nicht mehr 100% in Ordnung und bei einem zu hohen Strom bricht sie zusammen ( 4X12V-150AH)

Bei kleineren Entladeströmen gibt es keine Probleme.

layesp asked
layesp commented ·

1 Answer

Multiplus2/Bluesolar limited/throttled solar production


2 x Multiplus ii 48/3000/35-32 in parallel

1 x Bluesolar MPPT 150/70

8 x Trojan T125

18 x Renesola 300w panels 6 strings with 3 panels per string

Running ESS feeding excess to the grid.

I started off with 1 multiplus and 9 panels with average output as per graph.


I then upgraded with another 9 identical panels. The output was capped at just over 2kw.


And after adding another multiplus it is now capped at 3,6kw from 10am to 2pm.


Thinking that the inverter current is derated due to temperature as the internal fans switch on at 09:30 in the mornings already with room temperature between 20-23 degrees C, I have installed 2 120mm ac fans on each inverter and another one on the mppt ducting air into the bottom intakes. Before the mppt was almost hot to the touch, and now cool after installing the fan from 10-4pm. The fans made practically no change to the solar output.

MPPT current at the peak readings is 108V and 33A that is just over 50% capacity. At 3,6kw production the inverter is running at exactly 60% of the rated output. Any suggestions as to why production is limited or capped?

wannibi asked
wannibi commented ·

2 Answers

Multiplus II GX control charging current with analog input


I want to control the charging current of a multi2 GX 48V 3000 with a analog input .

I have allready a ESS system and want to add this feature Ladestromsteuerung.

I have a external current sensor - it deliver 0..2,33 V acording the power of a PV inverter.

I want to reduce the charging current of the Multi - if not enough power comes from this PV.

For 2,33 I want maximum , for 0V I want minimum DC charge current


I have measured the voltage is comes to the Multi but if I activate the Assistant for charge current - the battery is not charged anymore.

If somebody has a idea how to make it work - would be great.


volkerkuehne asked

0 Answers

[Multiplus II 48/5000 (240v AC)] AC In (grid) limited to 1.8kW in 'Inverter' mode (ESS Mode-3).

Hi all,

I recently got ESS (Mode 3) working on a MultiPlus II 48/5000, with a 300Ah LiFePo4 pack.

I'm able to control the import and export (setting AcPowerSetpoint through MQTT, topic W/<VRM_ID>/vebus/261/Hub4/L1/AcPowerSetpoint).

However, I've noticed that the import/export from/to the grid (AC In) is limited to 1.8kW, when charging or discharging. This limit isn't there when in Passthru mode.

Some examples:

'Maximum import' mode (i.e. full charge):


AcPowerSetPoint: 6000.

Expected: AC in would ramp up max rate service AC out load and to charge batteries with remaining power.

'Maximum export' mode (i.e. full discharge):


AcPowerSetPoint: -6000.

Expected: AC out would be serviced by the batteries, while AC in would ramp up to max negative value (export), supplied by batteries (-100A on batteries). I've observed this -1.8kW Grid value, even with low AC loads value (~0.6kW), but don't have a screenshot at the moment.

Maximum import rate with full AC out load:


AcPowerSetPoint: 6000

Observed: AC out is at max load (cooker, kettle, other loads on) for a limited time, at ~6.3kW. AC In is limited to ~1.9kW, with the 4.9kW being supplied by the batteries.

Expected: AC input would go to maximum to supply the AC loads, with any excess going to charge the batteries.

Here's more details of that instance, from the VRM portal:


Passthru mode, high AC out load:


AcPowerSetPoint: not being set (so not actively controlling setpoint). The AC in (Grid) isn't limited to 1.8kW here.

Here are the firmware versions installed:

MultiPlus II: 475

Venus GZ: v2.58

Is there a setting I've misconfigured that's causing this behaviour (1.8kW limit in AC in, when in charging/discharging a.k.a 'inverter' mode)?

Many thanks and Kind regards,


loxley asked
loxley commented ·

1 Answer

Multiplus entering power assist unnecessarily; draining batteries

The power system (components listed here; all devices have the latest firmware as of this posting) I installed in my fifth wheel is entering power assist mode despite the AC input being less than the input current limit. For background, one goal of this system was to be able to run a pair (15 and 13.5 kBTU/hr) of air conditioners on 30A/120VAC single phase service, with the inverters/batteries supplementing the grid power for intermittent loads like a Keurig, microwave, etc. The trailer came with one air conditioner on L1 and the other on L2. Of course, when only single phase input is provided, the second inverter inverts from 12 VDC but its continuous output must of course be limited by the first inverter's charging capacity of 120A. After conversion losses this is inadequate to power the second AC without pulling from the batteries (side note for any Victron employees lurking: *please* implement a way for the second inverter in a split-phase system to accept AC input that's in-phase with the first inverter! This is obviously something that can be done in software and its absence is driving customers with RV applications out of their minds). To get around this problem I installed a 20A switch that allows me to switch the second air conditioner from L1 to L2. I thought that was clever.

But not really; the stubbornness of the Multiplus defeats my ingenuity. See pics below.



As you can see, it is drawing well below the input current limit from the grid, yet "assisting" and drawing down my batteries. The total draw is around 28-29A although it can't be seen in the pictures (but you can infer it from the "AC Loads").

Please help me figure out how to force the inverter to draw up to the input current limit before it goes into assist mode; I really can't stomach the thought that I paid ~$15k and put in dozens of hours of work to actually lose capability.

Edit: The system is plugged into a 30A 120/240VAC split-phase connection. Inside the rig I have a 50A breaker upstream of the Multis, and I cut the little metal link joining the two poles of the breaker so that I can switch L1 and L2 on/off separately. In the example above, L2 is cut off to simulate how the Multis behave when only given a 30A/120VAC input (the first inverter switches to grid input while the second simply inverts from the batteries, as I ranted about in bold above). It is connected through several long extension cords, hence the voltage drop. Nevertheless, there is sufficient input amperage available to power these loads from grid input alone (and it certainly should be pulling more than 23A when it has a 30A input current limit).

Here's a VRM link:

And here's a link to the RVMS file with the current inverter configuration:


jersey-dirtbag asked
jersey-dirtbag edited ·

1 Answer

Victron Color Control GX- Quattro Shore current limit

Hello together,

I would like to change the maximum input current of the Quattro 8000/24 with the Color Control Display. I set the value to 32A and after some days or sometimes weeks, this value is changing back to 100A and the shore Power fuse is tripped.

This behavior is reproducible. I have the same system on 5 different boats, all of them have the same problem. This is a very big problem because after a few days in the harbor, the fuse will tripped and the boat have no longer shore power.

Connected to the CCGX is:

-Quattro 24/8000 [VE.Bus] VE Config: AC2 Input (Shore power) set to 32.0A with enabled "remote has priority" AC1 Input (Generator) set to 57A with disabled "remote has priority"

-Skylla-i 24/100 (1+1) Charger [VE.Can]

-BMV-712 Smart Shunt []

-VE.Bus to NMEA2000 Interface device [VE.Bus port from CGX]

I am extremely grateful for any advice!

offshore asked
offshore answered ·

2 Answers

On ArgoFET 100-2, what limits the excite current.

I have argofet 100-2, (fitted in 2009, and its feeding excite current forward ( in excess of 20 amps) when alternator not running, (with ignition on where the excite voltage comes from). Direct communication with Victron technical is needed.

It is positively dangerous and narrowly avoided fire simply because I had not switched the house battery isolator on. All the spec sheet says that the "new" argoFET unit excite current is limited, but obviously it is not on my version (2009). Is there a change in specification? Is mine a OLD one

or has it developed a fault,,,,,..

mobbzy asked

0 Answers

Small alternator 16A with Lithium


What recommendation would you share to charge 90Ah LiFePO4 with an alternator rated 16A.

Alternator is not a smart version, don't have any control in case of high temperature.

I'm quite sure that putting it without any Orion-Tr Smart would blow the alternator in a while.

OrionTr-Smart 12/12-18 is almost good, but since cannot set the current limit, it doesn't help too much.



lucasnowak asked

0 Answers

Sustain current too high?

Hello Victron fellows,

I have set some Li ion with Victron inverters, always for self consumption with PV inverters, but this one is cracking me up. This system consists in three 48V Multiplus II 3000/35 as a three phasic system, and an ESS assistant is set. The sustain voltage is 43V and cuttoff around 42V. The modules have a low SOH, but the system should work anyway. It charges and discharges correctly, up to the point where my BMS disables allow to discharge at around 48V, because there are low cells (it should discharge to less than 42V if it was good).

Then, Sustain mode is active and the current goes UP TO 90A. Of course when this happens the voltage raises quickly, the allow to discharge comes on again and it goes to Discharging mode. Repeating the process endlessly - Even without PV POWER, that means it consumes a lot of power.

My question is, why does it go up to 90A, since sustain mode should be 5A per unit and how can I solve this?

Thank you very much!

jorge-folgado asked
diego-quintero answered ·

2 Answers

Digital Multi Control - not able to set current limit over 5 amp

I have a MultiPlus 24/3000 (Firmware 469), using a Digital Multi Control to remotely limit the current.

In the past I had no problem switching currents between 5-16 amps. Now however the current limiter is only allowing a maximum of 5 amps. I have tried changing the settings on Shore limit. Turning off "Overruled by remote" does display Ac 1 on the DMC, and does allow me settings over 5 amps. Any settings I try with "Overruled by remote" enabled does limit me to 5 amps, both in "Charger only" and "On" mode.

What could be the cause of this?


aslak-heggland asked

0 Answers

How to Limit DC-DC Charger Current on Orion-Tr Smart?

Hey Victron community!

First time posting here, so forgive me if I'm missing any formalities.

I recently bought a Victron Orion-Tr Smart DC-DC Charger Non-Isolated 12/12-30. We are planning to use the charger in a travel trailer with a custom 300ah battery bank. The problem is that we want to wait to upgrade the OEM positive wire from the tow vehicle's battery (it is currently a 10awg wire) to a much larger wire until after we start using the trailer. Per my research, we will need closer to a 2awg wire, which is much bigger and a pain to re-route from the tow vehicle, so hoping to kick the can down the road a little.

With that said, is there a way to limit either max current or max power output on these units? Or is the only way to limit it via limiting the voltage? Are there any tricks to artificially limit the current?

Thanks in advance!

dirtjackson asked
ronhanson01 answered ·

3 Answers

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