Hi all,

Some background; Multiplus-II-GX grid tied, supplementing house via 'AC input 1', I am using ESS charging schedule along with limiting the max inverting system is a '48v' (58.8v) liion setup with it's own BMS that does not communicate to the inverter.

With no limit at 3000W which is the rated output the system works absolutely as intended, and when set to 0W it completely stops inverting.

I believe that I have a configuration issue here as this only occurs when I enable the 'Maximum inverter power' option to (for this example) 500W, the inverter seems to be ignoring the 500W limit.

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*the 99% SOC is wrong since I tried a firmware update, it was correct prior to 30 minutes ago

**I would also note that I use an external current monitor but the 'Grid' has NEVER shown correctly even though it does keep the house at around 10W and charges correctly when solar excess is occurring.

At 500W I then see the inverter switching between charging and discharging, seemingly trying to get to 500W as seen below:

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I'm open to share more for troubleshooting as I've reached my Google-fu ability with fixing this.

Hope someone can shed some light!

***EDIT: possible cause; when the limit is enabled it goes to the max current then scales down. So if the house load is 700W and the limit is 500W it will go to 700W then down to 500W but when the load is 2700W it goes all the way, then starts a bulk charge?? and repeats this behaviour.

Hi Victron community, I have one question regarding a couple Victron / DIY LFP pack with Seplos BMS.

If it is just to say that Seplos is not in Victron's compatibility list for BMS, you can save your time and are not forced to participate to this thread ;)

I use this BMS (I have 4 of them) and it is working fine, but, as there is a "but", a big one, I discovered that using only 1 battery pack (14kWh / 200A BMS) with a 5kVA Multiplus 2 doen't allow it to start as the transient current is too high for the BMS (fixed values in the BMS are 250A for 30mS, not changeable if you don't want to damage your hardware and loose the warranty).

Is there a known solution to limit the starting current on the Victron side?

Else anyone intending using those BMS in a Victron environement must pay attention to this "detail" and better find another model if they don't intend to have 2 or more battery pack.

Hi,

I am looking for a way to limit the Current for a powersupply using my Orion dc dc 12/24-5 as source. The Orion can use more Amps for a short time, but then fails. How can I make sure, it only draws 10A and not any more, even when the powersupply could use more Amps.

I ran out of ideas and found no real solution.

Please forgive me in advance as question reveals a gap in my understanding.

To address a 12v vehicle to. 48v house battery scenario - instead of a dc-dc charger I would like to consider using a phoenix inverter to go 12v->AC going into the MPii-48/3000 to charge 48v battery

Is there a way to limit the maximum power the phoenix will put out even if the MP is accepting of more (e.g. in active charge mode).

I know I could use a dc-dc like the Sterling however I really want to understand if and how this scenario could work.

thank you

When using input current limiting with the Multiplus-II, is the current rating for 1 leg, or both on split phase. For example, if I have a 50 amp input split phase input, do I select 50, or 100.

When I have a ~1400w load and select 5A input current limit, my multiplus limits to 4.5-4.7A, perfect. But if I raise it to 5.5, 6, 6.5, 7, or 7.5 amps it limits the current to 5A in all those settings, only when raised to 8A it will stop power assisting. Is there any setting that makes it limit to what is actually chosen in the setting? I have built a function to automatically regulate this setting based on PV power and battery current but it does not work correctly because of this inconsistency...

Regards,

mr happy

Hello,

I have a question about the currently used methods - what is the best and optimal method of separating power sources. I have on yacht following set of charging devices:

1.2x alternator 12V 80A on engine
2. Victron Multiplus 12 | 2000 | 80-50A
3. Wind/solar charger - output max 40A (other manufacturer)

Then I have 3 battery banks:
A. 1x 12V 120Ah standard battery - starting batt.
B. 2x 12V AGM 110Ah (Victron) - bowthruster and winch
C. 3x 12V AGM 110Ah (Victron) - house batt.

Please advise how is the optimal solution for connecting this different charging sources. I think to use three AgroFET 100-3 or 200-3 separators for each charging source. But maybe experienced users can advice more optimal method which control the charging current from different sources?

Do you think it is advisable to also separate the alternators and treat them as two separate power sources.

Regards,

Based on a ‘zeilersforum’ topic I found this question discussed: “Blue Smart IP22 charger trips automatic fuse” in this community.

Summary: a IP22 12/30 will trip a 6A and 10A fuse and not a 16A. So, you may need an inrush limiter as proposed by Victron.

In the same discussion Victron added that this phenomina has been discussed while preparing the IP65 design.

Old harbours may be fused at 6A or 10A rather than 16A. The shore fuse may not be accessable after it trips (a reset will do, if accessable).

1:-is the IP65 12/25A model year 2021 adapted in a way to limit the inrush current to 5A or such that a 6A fuse will not trip?

2:-to which save fuse size have the IP65 improvements result in: are 6A and 10A tested?

3:-if not, is Victron willing to test this (or these) charger(s) in order to document needed fuse level and inrush limiter recommendation?

4:-is there a Victron approved hardware interface or schematic with component list available for save use at 6A fuses (a 5A inrush limiter)?

5:-neither manuals are prescribing an “aansluitwaarde” (current supply level) and do not warn for low level harbour fuses. The charger will only take 1.5A average so this inrush is very unexpected. Will you update the manual or supply an addendum on the product tab of the website?

We have a seagoing trailer sailer located in the Netherlands and are planning sailing from remote locations next year, where neither 16A nor 24/7 harbour master may be obvious. The IP65 12/25 is the main charging source for the lfp battery.

Please add the question numbers as a reference to your answers. Thank you.

I have 600 watts of solar a 100/50 mppt and a multiplus 3000 120 12. My amp meter in the motorhome says that the input amps are at 50amps but the system is only 30amps how can that be? It was good and read 30 amps for a year and now it has changed?

How do you change the maximum input current? (Setting 21) The setting isn't highlighted in the Tsconfig Software.

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.

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.

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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

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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.

Volker

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,,,,,..

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?

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