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AC shore power availability for Multiplus output

I've searched extensively and am still confused. In this link @markus suggests "switch to charger only and now the AC shore supply will still be on and the inverter will be off, leaving ...AC shore supply available for DC charging and AC power...".

Another post from @JohannesBoonstra to this blog states "[for] ... Multi and Quattro the inverter always works (and the ACout is powered) when the unit is charging"

However, currently the experience I'm having with my multi (purchased Sep 2021) is that the ACout is only available if the unit is in the full on mode. The 'charger only' mode eliminates ACout to the receptacles. The problem with the full on mode is that if the shore power is unknowingly disconnected, the batteries drain very quickly due to the standby current draw. I did try the AES function but the modified sine wave didn't help much and the AES surge mode caused issues with the microwave.

What I want is to configure my multi so the following happens:

* When shore power is connected/ON (120V up to 15A)

Ability to use ACout to power receptacles

Inverter is off (eliminating standby current draw)

Battery is kept full or charging

* When shore power is disconnected/OFF

Battery is prevented from discharging

Inverter is off (eliminating standby current draw)

(which also means no power available at ACout power receptacles)

To do this what is the configuration I need? @markus references an article suggesting setting the multi to 'charger only' and the current to zero. Can someone clearly confirm this and whether I need to actually purchase a Digital-Multi-Control to achieve the above behavior? Are there other alternatives?

One would think the default behavior with a 'charger only' configuration would be to allow any ACinput to pass through (if present). In the 'charger only' configuration it does not make sense to me that the current limiting function should have any bearing on pass-through ... a value of zero seems to imply there is no current available/allowed for charging (i.e. the multi is equivalent to fully off). Any explanation as to why this is not the case is greatly appreciated.

thank you.

earl0101 asked

0 Answers

Trickle charge multiplus 12/3000 wont charge?


I have a brand new multiplus 12/3000

The trickle charge output is connected to a 12 volt 140 ah battery. The voltage is 12,87

When i turn on the multiplus the trickle charge wont charge (i have a smart shunmt connected to the starter battery) and when the multiplus goes into float status also nothing will happen.

When i disconnect the trickle charge cable i measure 4 volts on the trickle charge outpul.

Is this supposed to be? Will trickle charge only charge when reached a certain battery voltage level?

Best regards and thanks in advance!


piet-hein-van-asselen asked
sprinter2072 answered ·

1 Answer

Blue Smart IP22 Charger 1 vs 3

How does the 3 output behave with only one battery connected? Is the total charge output divided among the three outputs regardless? For example if only one battery is connected to the 3 output model would it get a 30 amp charge or a 10 amp charge. If the output is divided can all three outputs be hooked up to one battery?

joewwy asked
Matthias Lange - DE answered ·

2 Answers

Multiplus II with Cyrix-ct

Is it possible to put a Cyrix-ct between the house battery bank, which is charged by the Multiplus II, and the starter battery which is charged by the second charger output which is limited to 4A. This will allow the starter battery to charge faster once the house batteries are fully charged.

Thank you,


ralphd asked

0 Answers

IP65 12/15 Smart charger - charged amp hours

I have 100ah Lithium battery and use 240 volt IP 65 12/15 to charge. Using Blue Tooth history, shows that Charged Amp hours (in this case) show 76. My question. Is this the amount of charge that the IP65 has just added into the battery to take it up to full charge. In other words, the battery already had 24 amp hours capacity before recharging?



bmgill52 asked
wkirby answered ·

1 Answer

VE.Bus BMS with non VE.Bus Phoenix Multiplus

I have a VE.Bus BMS and a very old Phoenix Multiplus inverter charger that doesn't have VE.Bus.

My concern is:

- how can the VE.Bus turn off the charger to protect the batteries against overvoltage when charging?

- Can I put a battery-protect in-between the phoenix and the batteries?

- Will the charger be damaged if the BMS disconnects the batteries via the battery-protect mid-charge?

- Are there any other options?

charlie-pank asked
charlie-pank answered ·

5 Answers

Charge independently 3 12V series battery

Dear you all,

I am writing to ask help for a purchase.
I own 3 AGM 100A 12V batteries, that I need to connect in series to power a DC 36V motor. I would like to recharge the batteries independently, with 3 different 12V chargers, my to obtain the best single-battery charge. I thought to use a system like the LiPo multiple cells recharger work

Which is the best option to do that? May the bpc121544002 Blue Smart 3x12V outputs charger work? I couldn’t find any useful information.

Is there any other solution? Or is it better to recharge it with a single 36V charger?

My kindest regards,

Luca Gilardi

lgilardi asked
kevgermany answered ·

1 Answer

Off-Grid (Parallel) 48v AC "Smart" Grid Charging as Winter/Backup "Generator" in Germany

In Germany an Off-Grid system with any kind of AC Grid connection (even totally disconnected) on the same piece of land is considered "parallel operation". If we indirectly or directly connect any "generator" (including Multiplus or Quattro regardless of configuration) to the grid we are no longer in parallel operation and a ton of rules, bureaucracy, tax, and even remote control is applicable! So long as the sun shines everything is okay, until winter...

Even with an oversized "full roof" solar array, in winter especially with EVs, the only way I see to cover the couple of months with poor sun BUT keeping ALL the electronics Off-Grid is to trickle CHARGE the batteries from the Grid for a few days/week at a time. For example, like an ad-hoc/mobile EV charger or electric oven we can draw up to 3,6kVA from a "charger" 24/7 without breaking rules to deliver 86kWH/day. Using the battery as a buffer, we can then trickle charge the EVs for a few hours each day, cover heating and entertainment requirements. On the DC side everything is perfect with Multis/Quattros even using DC power directly to reduce battery cycles.

It's important for me to keep ALL the electronics Off-Grid so that I have (almost) complete freedom to choose the power rating and technology within my system. My Grid distribution box will only contain a couple of power sockets for testing plus chargers split evenly across all phases, that's it. The energy company has nothing to say about the rest (common electrical safety respected). ;-)


Of course, the basic assumption here is "not direct or indirectly connected" regards AC/Grid power. Here we only have DC connectivity between the Grid and Off-Grid systems, technically they are only "connected" via magnetic fields.

Now the question...

The Skylla 48v 25A charger appears to be the only option (x3 <= 3.6kVA), is expensive at 900€ each as I have to buy 3 (2700€), but not very smart at all. There is no way to share temperature, voltage sense and BMS control via any VE bus (Direct or CAN). I could get a Multiplus or Quattro at similar prices but those can feed energy back to the grid which is not allowed. I guess I have to use them as dumb chargers with the remote switch/relay and shunt to fill-in for the missed capability.

The Skylla may even have to be set in power supply mode to prevent its charge logic conflicting with the BMS or much higher than spec capacity house battery? :-( I'd really like to keep a pure Victron installation but if it comes down to power supply mode then are there any 3rd party 48v chargers which integrate with VenusOS or a VE bus?

I hear the rules are very simple in the Netherlands, perhaps why Victron don't see this requirement? Then Victron don't make "Smart" 48v chargers because they feel the demand is covered by the Multiplus and Quattro? But these devices CAN return energy to the Grid, so considered "energy production" devices, which IS a problem for evermore people seeking Off-Grid as a solution to the politics or just want freedom of choice.

Or is there something I missed here... For example, is it impossible to return power via the AC2 input of a Quattro with physical/electronic limitation (it would have to be documented also with a schematic as proof for the energy provider)?

code-chief asked
bbmz commented ·

1 Answer

blue smart ip22 charger dead

I just purchaesed a blue smart ip22 24v /8amp. I connected it up and used it fine to check if it worked an it was ok. I connected to the bluetooth and it did a firmware update. Today I wanted to use it and nothing its just dead not lights nothing. Any ideas?

philspain asked
kevgermany answered ·

1 Answer

Wiring Options for Blue Smart Charger 12|

Hi All.

I recently purchased the Blue Smart Charger 12 | 7 and I'm wondering if it is suitable for my use (I suppose i should have asked this before buying it). I have a 26' sail boat with a single 12V AGM battery, and currently only a DC system. All loads are very light, under 2amp draw.

I'm wondering if this charger is suitable to be installed for charging on an ongoing basis when hooked up to shore power? and also the charger comes with a 3 prong AC plug for input, can this plug be stripped and wired into an AC panel as i've planned in my wiring diagram?

Appreciate anyone's input. Thank you


rob-glazier asked
rob-glazier edited ·

1 Answer

IP65/IP67 Blue Smart Charger not putting out the amps I was hoping for

I am charging a lifep04 280ah 14.4v battery. The charger is only pumping out 2.9 amps and at this rate it will take 26 HOURS to charge. The battery is at 13.6v so I am confused as to why this 25amp charger is not putting the power to the battery. Any help would be greatly appreciated. Thanks Matt


dadgumadventure asked
Matthias Lange - DE answered ·

1 Answer

Should I use "high" or "normal" mode on an IP65 for this AGM battery?

I have a similar question to this original post, but with some more details to provide. My 100AH AGM battery is a Fusion CBC12V100AH and includes the following information printed on it regarding constant voltage charging:

Standby Use (Float Charge): 13.5~13.8 Volts @ 25C
Cyclic Use: 14.4~15.0 Volts @ 25C
Max Charging Current: 30A

Based on that information when the battery has been moderately discharged I would have thought that using Blue Smart IP65 Charger it would be appropriate to use "high" mode rather than "normal". What is the recommended mode for that information?

aussiebattler asked
Stefanie answered ·

1 Answer

Mppt 250/70 blue tooth symbol missing on displa

Hi I can't connect my blue tooth phone to the inverter and noticed the blue tooth symbol is missing on the display How to I fix this

daring asked
Thiemo van Engelen (Victron Energy staff) answered ·

3 Answers

Is an IP67 Blue Smart charger isolated?

Specifically, can I stack two 24V chargers in a 48V bank made from eight 6V batteries in series? There would need to be DC ground isolation from both the AC line and safety ground.

ddw asked
ddw answered ·

3 Answers

Is a Phoenix 12/50 120V charger compatible with Cerbo GX?

Hello. I am new to the community and Victron products in general. I currently have a Phoenix 12/50 charger (120V) that is brand new purchased January 2022. Sorry, I don't have the S/N handy. I also plan to purchase a MultiPlus 3000 inverter charger soon and will add solar in the future. This is a marine install with 3 battery banks. I will use the Phoenix for the 2 smaller banks and the MultiPlus for the large house bank. I would like to connect all these to a Cerbo GX w/ a Touch 50 panel.

I am finding it challenging to determine if the Phoenix charger will communicate with the Cerbo GX. I know the Multi will and am sure the future solar will but the Phoenix is a mystery.

Can anyone help me out>



scott-coles asked
Alexandra answered ·

3 Answers

power consumption - leakage current.
Hi there,
Is there a leakage current when connecting this cable when it is not in use?   Just the cable ist Connect without charger 
M6 / M8 cable lug connector without fuse accessory for the Blue Smart IP65 charger with DC connection.

Many Thanks For info

klem asked
Alexandra answered ·

1 Answer

Blue Smart IP65, calcium battery

I am interested in purchasing Victron Blue Smart IP65, which is explained in the manual:

The table recommends 5A for "classic" and 15A for "modern" (while limiting batteries to 50-150 Ah). I have a hybrid car, but a rather old type battery - calcium 45Ah (originally installed at the Toyota factory, 2021).

Does the above limitation preclude my battery? (45 <50, which is given here as a minimum)

I mention that I want to charge without disconnecting the battery from the system.

xyzt asked
JohnC commented ·

7 Answers

How does Cyrix-Li-Charge work with Smart BMS?

Connecting Victron 200AH Lithium battery with Smart BMS 12/200 to existing Magnum charger/inverter & Magnum ARC50 Remote Control in marine system with alternator and starter battery. According to the smart BMS literature, I need the Cyrix-Li-Charge to protect from overcharging the battery.

My question is, doesn't the BMS disconnect the battery from being overcharged? Also, doesn't the Magnum charger controller stop the charger from overcharging the battery? Just confused how the Li-Charge fits within the BMS and the Charger controller.


aleainc asked

0 Answers

Reverse current and battery drainage on Centaur chargers

Does anyone know what is the reverse current on the 12V 20A and 30A Centaur chargers when the mains supply is not available? Can it drain an AGM battery in a short time?

panko asked

0 Answers

Blue Smart IP65 12/15 - odd voltage readings vStart/vEnd


Hey there,I wanted to ask, why the Victron App displays odd voltages at the vStart and vEnd readings. The battery in the screenshot was resting for minimum 30 Minutes, at the vStart I got 13,xx V and still it was possible to load in >10Ah? Literally no one could explain why there is a huge difference between vStart in the App and the actual voltage of the battery. I tried it with 3 different AGM-batteries from 2 cars and still, I always got strange readings on vStart.

The second thing is: Am I correct that vEnd is measured right after absorption? Isnt it so that the batt needs to rest for 10-15 min after loading to show the actual voltage?

docloboto asked
docloboto commented ·

2 Answers

24V charger with 3 isolated output to charge 48V battery bank


Recent fan and total newbie.

I am thinking of a 48V back up system with grid charging for my home power few lights and security system.

When it comes to chargers I found few Victron chargers with 24V ,three isolated outputs. Is it possible to combine the isolated output in series to make a 48V charger? I am looking at

PHOENIX smart IP43


To be future proof I will need Li Battery charge option hence cant use Skylla TG only option with 48V.

Thank you.

vicsla asked
vicsla answered ·

1 Answer

Blue smart 12/30 charger voltage/current spikes

I have a 12/30 3 output blue smart charger that’s hooked up to my leisure and starter batteries in my campervan.
After a couple of days away I plugged in the charger and I’m seeing this spikes in the charging voltage that I’ve not seen before.

Is it anything to worry about? What’s causing them?


ped-baker asked
ped-baker commented ·

1 Answer

Can I use an external Blue Smart Charger while Multiplus is Inverting?

Trying to avoid installing a generator transfer switch.

In the event of low battery (under 20%) AND grid failure can I use a small generator to charge the batteries with an external stand alone "Blue Smart Charger" while still utilizing the normal capability of the Multiplus II inverter? When I say normal I mean this is a small cabin with a typical full load of about 350 watts. 900W microwave on occasion.

What if the power comes back on while charging? Should the main breaker be turned off before attempting this?

What about solar charging at the same time? Is that going to be ok?

Grid connected ESS with the following equipment.

Cerbo GX
MultiPlus-II 12/3000/120-50 120/240V
BMV-712 Smart
SmartSolar Charger MPPT 100/20 48V

elvis asked
kevgermany answered ·

1 Answer

dc-dc charger

Hello, friends. Need advice.

I have an motorhome with "Victron Energy Orion-Tr Smart 12/12V 30A DC-DC Isolated Charger" to charge my house batteries. But sometimes i will need to feed the starting battery a few amps from the house battery (listening to radio with engine off, using other accessories).

Is there a way for my isolated charger to short input and output? If not, would it be ok to short it manually though the switch?

michael-roslyak asked
michael-roslyak answered ·

2 Answers

Connecting 12v power supply to MPPT load output

I want to add a winter/shade 12v power supply to my camper and it would be most convenient to add it to the MPPT 15/75 load output circuit at the fuse panel (i.e. not the chargers solar input)

Would having this additional 12v source present on the "load" side somehow damage or interfere with my charger? Would it be better to hook up an AC battery charger to the battery?

jaredv asked
kevgermany edited ·

2 Answers

Phoenix Smart Charger, Float duration, HEX-Protocol

Hello all,

how long does the float phase last until the charger switches to the storage phase? How can I set the float duration?

And where can I find the documentation for the Hex protocol of the Phoenix Smart Charger? Or who can send it to me?

Thank you.

Best regards

felixsteinbeis asked
felixsteinbeis commented ·

1 Answer

VictronConnect smart charger no Bluetooth

I just just hooked up my IP65 smart charger, I had the Bluetooth all connected. I then disconnected the Bluetooth and deleted the device from the app. I am trying to reconnect but it’s just saying can’t find device. I’ve deleted the app and reinstalled it, I’ve turned off my phone on and off again. I’ve disconnected the charger. Anything else anyone can suggest?

anwar asked
Alexandra answered ·

1 Answer

Repair centaur 24/40 in Hong Kong asia

I have been in Hong Kong now for a couple of years and ask myself a lot if its possible to repair units that have failures. I have seen at least 20 chargers that had problems and end up to be throw away.

Not all the dealers are able to repair.

It needs to become more normal to repair items, I hope Victron wants to help to improve and can maybe give more online support so that people can do them self also repairs. OR give a good alternative that makes sense.

Is there any one that have good tips to find information to repair units. I am now looking for repair a Centaur 24/40


Jordy asked

0 Answers

Outboard alternator charging lithium


To charge a 12V LiFePO4 from an outboard alternator charging coil, what product is suitable to regulate the charging?

System Components

Outboard: Manual start, Honda BF6, 12V 6A charging coil
Battery: Lithium (LiFePO4), 12Ah, max charging rate 0.8C (9.6A)

Research Done

Watched the Victron Q&A Webinar 1 - Using an Alternator to charge Lithium video, and understand that since the battery has a larger C rating than the alternator, alternator current must be restricted using a Smart Orion or similar.

Options Found

Using the VictronConnect app to check the interfaces via the demo mode. Nothing appears suitable:

- Phoenix Smart Charger IP43 12|30 has "maximum charge current" settings of 7.5A, 15A and 30A, the minimum is too high for the alternator.

- Orion Smart 12V|14V-18A Isolated has a LiFePO4 battery preset but no current limit settings (just voltage), and it isn't clear if it's ok with the variable output from an outboard.

- Blue Smart Charger 12|5 can limit charging to 2A or 7A, but is mains powered, and the 2A lower limit loses 4A of potential charging, while the 7A upper limit is too high for the alternator.

- SmartSolar Charger 100|15 can limit charging on a variable scale in 1A increments, but it's inputs are designed for panels only(?), not an alternator.

Which Victron product will allow the charge to be limited to a safe current for the alternator?


I am in a 3m open-top inflatable boat so the system needs to be compact, light, and simple.

neepsandtatties asked
neepsandtatties commented ·

6 Answers

MPPT 100/30 + Blue Smart IP22 Charger - Going into Lynx Distributor

I am setting up my solar system on my sailboat. I have 2 250W Solar Panels going into breakers and from there into two Victron MPPT 100/30 Controllers and from there into a Lynx Distributor. I was planning on connecting a BlueSmart IP22 Charger (110V) into the Lynx Controller to provide additional charging when connected to shore power.

Is this something that can be done or do you see a problem with this setup?

Any guidance will be greatly appreciated.


jose-torres asked

0 Answers


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