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Polarity protection for mobile multiplus

Hello everyone,

the manual states(Multiplus 48/3000), that the Phase from the Grid should be connected to the Phase-In from the Inverter. Due to the mobile usage of the Inverter, the Inverter shall be connected to the Grid with a Schuko plug However the right plugging of the schuko plug is not always ensured, because you can plug the schuko plug in two ways (Not turned Phase to Phase, and turned Phase to Neutral). Does somebody know a device, that stops the current from follwing when the device is not connected properly?

Cansin Sari asked
Cansin Sari rolled back ·

2 Answers

Need help choosing the right components for a solar fridge project

Full disclosure: I'm pretty out of my depth when it comes to things like this, so I expect to need a lot of help. Thanks to everyone in advance.

I'm putting together a solar-powered outdoor fridge and food pantry using a Dometic CRX-80 minifridge (12V DC, ~50W, <2amp draw) and a JA Solar 395W panel (49.64 Voc, 10.27 Isc). I'm planning to purchase an AGM battery/batteries and a Victron SmartSolar charge controller, probably the 100/15 since it has the heatsink that the 75/15 lacks.

I need help figuring out the ideal battery capacity, choosing a good battery that can ship to Hawaii, confirming my choice of charge controller, and also figuring out what other things (wires/fuses/accessories/etc) I'll need to order. Please advise!

ezlev asked
seb71 commented ·

3 Answers

Pylontech High Voltage Alarm US3000


We have just replaced batteries with Pylontech US3000 x 2 on an existing off grid solar system. We are getting a high voltage warning with the SOC at 81%. We have updated all the firmware to the lastest release as directed on the victron and pylontech page.

Here are the details of the system

Victron easy solar with 48V, 3KVA Multiplus, 150/70 blue solar MPPT, 2 x US3000 Pylontech Batteries.

Firmware Versions

CCGX - V2.63

MultiPlus 3KVA - V2620459

MPPT 150/70 - V1.54

VRM Portal ID - 508cb1e4251b

Please Help

Chethan Bandi asked
seb71 edited ·

3 Answers

Baud rate conflict 250/500kbit/s - Parallel Quattros-Cerbo-Pylontech-250/100MPPTs-Lynx....

Off-Grid system has 2 x Quattro 48/10000 in Parallel with 24 x Pylontech US2000 & LV HUB, Cerbo GX, Lynx Distribution system inc Lynx Shunt, 2 x 250/100 VE.Can MPPTs ground array, 2 x Fronius 6KW PV Inverters roof array. Perking 12kVA Generator. All kit a few months old. All Firmware updated to the very latest.

Following the Victron documentation Pylontech (Type B cable) to Cerbo VE.Can BMS connections. MPPTs and Lynx Shunt to Cerbo VE.Can connections. Quattros to VE.Bus connections. DVCC enabled, settings as per the book.

Problem: With CAN-bus BMS (500 kbit/s) CAN-profile in the CCGX as per the book, the MPPTs and Lynx Shunt disappear. They reappear if the baud rate is set to 250 kbit/s. Various problems manifesting such as auto-run generator stops working etc.

Am aware that others have had similar issues with the 250/500 kbit/s conflict. Any suggestions how to get round this - thinking switch the MPPTs to VE.Direct connection instead of Can but hate work-arounds and want the correct solution!

Thanks in advance!

colins asked
colins commented ·

1 Answer

Quattro and multiplus in offgrid making a loud buzzing noise and generator roughing

Here is the topic, i have builded and installed many system since i began working with victron products, it's the first time that i see this kind of trouble.

My system is builded on a sheet of aluminum 1/8 thickness where everything is located on it as: quattro, lynx bus system and distributor bars, solar MPPT 250/100, aux. centaur charger 24/60, AC main panel, ccgx and wiring cleanly strapped, not the first like that and they all juste work roundly all the time.

System work's fine for the most part, everything is stable and silent unless i hook up a generator to this offgrid system, in my shop when i tested on my test bench i heard no noise or harshness from the inverter when i hooked it up to the grid to charge my testing battery bank but at the customer place oh boy!

so when it's hooked up (brand new honda eg5000cl) the inverter already start humming a bit then when the charger ramp up to max output it is very concerning like a rattle humming noise unequal making the generator sometime lead to disconnection temporarily and reconexion after 1-2 min.

Even when i totally isolate the AC panel from the inverter by flipping the main AC breake i still have this bad noise so i don't think it is comming from AC directly, i found some ground/neutral loop in this house that i immediatly solved to clear few trouble makers but the only way to tame the noise is to isolate the battery bank from the quattro charger it return to a normal noise.

I stabbed a 10 foot ground rod near the generator and hooked up to the house ground rod to help draining any noise directly out of the generator but it gives nothing.

i tryed a dummy battery bank with 4 Rolls S-550 PBA battery instead of connectiong it to the large rolls 2ks 1866ah bank that already ave 5 years but it's the same problem so it's not the battery.

i tryed many ground to neutral placement in the electrical panel( bonded to neutral or direct to frame and insulated from neutral) just to check but nothing helped, my generator is connected to input 1 since i don't have grid there, i tryed with a multiplus just before because my customer was in trouble and needed a system ASAP and it was even worse so it's not the inverter directly.

Something i noticed from the generator was when it ramp up to the charger max power output it will give the hiccups to my generator even if we are only loaded at 21A/30A AC i can hear my generator in the inverter and also the hiccups happening randomly.

it should be pretty silent normally so im mesmerized what it could be when it's working great in my shop, i heard NE relay chatter could cause a rattle hum noise, would it be that loud and accentuating with load? if so why? and is it a good option to just manually toggle the NE ground relay in the software if my main neutral ground bound is in the main AC panel and that the sheet itself serve here as a common ground/heat spreader/frame bonding everything.

Could it be my aluminum sheet magnetically vibrating because of the inverter high power output? if so i would feel it in the wall and the generator would not throbble like that!

well im rubbing my head like a monkey there let me know your tought! i can acces the system via VRM if needed to test thing remotely or go on site if i have good cues, my next step was to swap with a different generator like a yamaha 7200 and run a new ac cable from the gen if it was doing nothing more to help.

manhard asked
manhard answered ·

3 Answers

generator choices offgrid

I am about to change our inverter over to a new victron, and we need to get a generator to go with it.

The system will be a venus GX and a victron multiplus 5000/48 AC-coupled with a fronius primo 5-0-1 and later on a DC coupled blue solar MPPT. Batteries are 2x LG RESU 10, so 20kwh in total.

I want the AC input on the multiplus to be a generator- for charging only. I've always been told that we need to use an inverter generator to keep the power quality up but I note that a few places on the victron site suggest that AVR units will be fine- thoughts? I don't want a huge generator, about 5kva ish is my plan, and use the current limiter on the ac input to ensure its not overloaded.

bryn asked
alan edited ·

7 Answers

Fronius Victron connection


I am in the process of designing an off-grid solar household system. I would rather start small with good modular components than go big and cheap. I am currently looking at a Fronius Primo 8.2 running of 30 x 360W Canadian Solar panels at 48V. This will then be connected to either a 5Kw Quattro or 5kw Multiplus (advise on this choice will also be appreciated) to charge 2 x 9,6Kwh Pylontech battery banks (19,2Kwh at 48V). I am looking for wiring diagrams for such a system and advise on any peripherals that will be needed. Can I connect the 8.2 Fronius to the 5kw Victron? Where will my PV power be delivered? If I generate 8.3kw through the Fronius and dump everything into the 5kw Victron will I loose the extra 3.3Kw? Could this be remedied by using the double AC in options on the Quattro? There seems to be limited information on this type of paring on the net and any advise or guidance will be greatly appreciated.


archman asked
Matthias Lange - DE answered ·

1 Answer

Hive Heating UK

A weird situation -

I have a victron multiplus providing power to a house for backup purposes.

When the power to the house is supplied by the multi the Hive heating system doesn't work.

The heating receiver connected to the boiler works for a small amount of time (less than 30 min) before going to an offline state.

This doesn't happen on grid.

has anyone had this same issue?

Just for info the internet connection is fine, the batteries are circa 80% SOC, i'm wondering if the output of the victron is not accepted by one or more of the elements of the hive system

dangermouse asked
bentonaj answered ·

2 Answers

Off grid inverter with batteries/no ess

Hello everyone,

I do really think that I need your help to understand how does my system work.

I have an off grid inverter QUATTRO with a floaded lead acid battery 48V and two regulators, i don't have an ess.

The installation was quite long and the technician didn't really explain how the system works.

Could you please explain me the process between PV, batteries and loads during the day and the nights.

It seems to me that in evening and night my batteries don't partecipate so only grid gives power, even if loads are few hundres.

Thanks so much

lorenzo-accaroli asked
lorenzo-accaroli commented ·

11 Answers

24V Panels to 12V bank SmartSolar using MPPT 100/50

I have 4-12v solar panels planning to run series-parallel pairs 24v into my SmartSolar MPPT 100/50 and out to 4-12v 200Ah AGM battery bank.

This is for an RV boon-docking setup and I will be using my existing 12v 3000W inverter for now. So until I upgrade, is there anything aside from less overall efficiency I am missing or should be concerned about with this setup?

thanks in advance for any input!

m-beach asked
michaelvausr answered ·

1 Answer

MPPT update to charger panel wiring

I recently Upgraded to SmartSolar Charger MPPT 100/50 for my RV setup. I presently have 3- 160W (8.38A) Flex panels run in parallel to the charger (based on advice for my previous 30A PWM charge controller).

I am looking to add a 4th panel to the setup and more storage capacity. my question is wether I should add it in Parallel as well or should i rewire for series or series/parallel for this new controller? attached is previous wiring Diagram with old charge controller for reference.

Any advice would be greatly appreciated.


m-beach asked
Rob Fijn answered ·

3 Answers

Why is this system not fully charging the batteries from AC PV?

Dear all,

My parents have a new off grid installation in Spain (no grid available where they live). The installation was installed August 8th 2020. I haven't physically been able to and check their installation (due to covid restrictions).

I am not at all a Victron specialist, but have installed my own Solar system, and I am very much into LiFePO4 batteries/ DIY powerwalls / off grid systems in general.

I believe their system isn't working as it should, based on my experience, and therefore I started to study the parts used in their installation in order to help them find the problem (because the installer treats my parents as retired old people and says everything is working as it should). But, wait...

The parts:

* 39 solar panels:

- 12 280W panels connected to Victron MPPT150|60-TR Bluesolar charge controller

- 27 280W panels connected to a 5kW SMA sunny boy (sb5.0-1av-41 905). I don't know how the sunny boy is connected to the system. It's an "on grid" invertor according to SMA (= grid tie), therefore it would suffice to connect the SMA AC to the juntion box and it should regulate/synchronize it's output wave based on the Quattro AC (i suppose that the Quattro will act as the "grid").

* Quattro 48/10000/140-2x100

* 6 x 2.4kWh = 14,4kWh pylontech pack of batteries, good stuf

* Venus GX

The dashboard, at the moment, looks like this:



* Let's say that it's 1400hrs, the sun is shining bright, and the batteries are @ 60% and charging. Then, all of a sudden, the SMA stops putting electricity on the "grid". Often, the SMA sunny boy stops working for say 1 or 2 hours, losing critical energy in the winter and the end result is a battery that is say 80% charged instead of 100% at the end of the day.

So I checked out the statistics @ the moments that this type of scenario takes place (almost every day), check this out:

My father notices, for example December 13 (but this happens every day) that the Sunny Boy isn't putting power to the grid (He checks the Victron dashboard regularly, so he notices this quite soon), and he let's me know. So I start digging... And I notice this:

I notice that there are gaps in the production of the sunny boy.


I check the SMA error page, and at the moments that there are gaps in the production, I get frequency related errors:


So I go the the VRM-app, and dig into the frequency statistics:


To me it's clear that something is causing ripples in the AC frequency (from for example 11AM-> 1300hrs, 53Hz, which isn't just a ripple).

My parents state that their bulbs start flickering, change brightness when these peaks/gaps occur.

* Initialy the installer installed a 6KW SAJ invertor, but this invertor got so terribly hot, that after a week or 2 it died. The installer then replaced the SAJ with a 5kW Sunny Boy. I told him (through my parents, I didn't actually get to talk to the installer) to install a 6kW invertor, because my parents paid for a 6kW, and 27 panels in Spain cán in fact generate more that 5kW. But the installer said that that is non sense, a 5kW was just fine.

-> What the F*c#??

* The installer installed a 3-way switch for 'solar system', "off" and "generator".


When my dad connected the generator and sets the switch to generator, all lights inside the house started to shine brighter, a couple of LED-stripts/bulbs "exploded", and the quattro started clicking like a maniac (must be relays trying their best to regulate something).

i believe they miswired the generator connection to the system. I think that my dad is putting 220V onto the system (with the generator), but the quattro is the master, not a grid tie invertor. Therefore the quattro doesn't synchronise it's 220V with the generators. The result is, I believe, constructive and destructive interference and as a result the bulbs exploded due to the AC peaks.

Does this seem likely to be the cause/what's happening?

What my parents want:

* to have as much and as stable of a 220V system as possible

* to have the invertors charge the batteries as fast as possible, without devices stalling for no reason (because the loose precious daylight in the mean time)

* to be able to connect my parents 6KW generator to the system to power the house and charge batteries in dark weeks without a lot of solar power;

That's it, and that's what's promised by the installer.

Please give my your thoughts. I'm watching all that is to be watched on YouTube, reading datasheets, etc. but actual help/opinions of guys witch real Victron knowledge would be invaluable.

Thanks in advance.

hdb asked
hdb answered ·

7 Answers

Inverter/Charger selection for pure Off-Grid/MicroGrid/Island setup


i plan to move to a complete decoupling to the public grid (microgrid/off-grid/island) in a 3-phase configuration. The basic power and battery requirements are known and i could use the Multiplus 48/5000 or the Multiplus II 48/5000 or the Quattro 48/5000 - but which of them is best suited in this mode ? Any special feature at the AC-In line does not matter (there is no public grid) any PV and other genset are connected to the AC-out. Running ESS configs in the past with both Multiplus variants shows that the MultiplusII fans are more or less always running which was not the case with the Multiplus - which is not critical but worth mentioning. Because both Multiplus variants are still on sale, i'm curious to understand the pros and cons for my planned off-grid configuration. Any advise/comment/experience ?

best regards,


martghh asked
alan commented ·

1 Answer

Help Selecting Products

I have a project that requires an off-grid battery storage and inverter solution. I have a 120vac 10amp load that needs to be brought off grid. I don't care which battery config (12vdc, 24vdc, etc.), but if I can manage it, I would like for this entire project to be purchased from one vendor (ie Victron). They only thing I would like to incorporate that I already have is the Yangtze solar panels listed below.

More details:

Load: 120vac, 10amp

Solar Panels:

Calculations I'm using for reference:


tiki1469 asked
Matthias Lange - DE commented ·

1 Answer

Off grid system - need guidance

Hi there.

Trying to size my system correctly with Victron products.

I am going to setup a 3 phase system using 3x multiplus II/3000/48V + 2x Smart Solar MPPT RS

I have a DIY 20 KWH battery with batrium BMS.

I will feed grid into the inverters.

- How will the multiplus act, if i pull more than 3000 watt from one phase? I see peak is 6000 watt, but there must be a limit for how long time it can deliver 6000w peak?

- What will happen if i install the system without a battery, for starters?

- Is it nessecary for the Victron to talk to my Batrium BMS - the unit should be able to measure the battery voltage by itself?

- Can i prioritize the system to deliver power from panels, before delivering from battery?

m1kkel asked
Matthias Lange - DE answered ·

1 Answer

Offgrid PV Inverter Support Assistant and the fixed 13.5V / 27V / 54V limit

To prevent DC and AC voltage overshoots because of varying solar irradiance and/or load fluctuations, it will limit the charge current already before battery voltage has rised up to the absorption voltage. It will derate the maximum charge current from 100% at 13.5 / 27 / 54V to 10% at 14.4 / 28.8 / 57.6V. These thresholds are not related to the configured absorption voltage.

Hello, knowing this has already been increased a few years ago and is somehow necessary, I'm still wondering about the reasonableness of the fact the voltages are fixed.

In my opinion this should consider capacity:inverter ratio and especially battery type and voltages! Using a relatively small inverter in a big sized lead acid offgrid installation this makes the AC-coupled power pretty useless for charging, although lead acid doesn't care much about overvoltage!

Now let's look at the Pylontech or other 15s Lithium-Storages, that probably don't even have a GX. Their absorption voltage is below 54V so there is no derating at all, although Li can be damaged by overvoltage? Further this means 15s systems can use the full power for charging while 16s or lead acid systems are extremely disadvantaged. Due to the fact that this is for protection I don't understand why some systems can use the full power up to absorption voltage and others cannot.

Can someone tell me the technical background of the fact that the voltages and the derating are fixed and anything else isn't considered? Probably @Johannes Boonstra (Victron Energy Staff)

Thank you very much!



porcini asked
porcini edited ·

2 Answers

Are 50vdc solar panels wasted on a 12vdc system?

Hi, I am just trying to get my head around this and wonder if someone can confirm it please?

For a 12-15vdc battery off grid system needing to charge through a charge controller via a solar panel array of course which the panels are rated at around 55Vdcmax.

With the cheaper Ebay MPPT controllers (link to example type bellow), they cut off the solar panels inputs if the solar panel voltages are above around 15Vdc, so effectively the panel would only charge the system when the panel voltage is within the 12vdc - 15vdc, effectively only for a VERY short time in the morning and again at sunset.

With a Victron charge controller like (link of example type below), to charge the 12-15vdc from the panels (55Vdc). Does the Victron charge controller cater for the full 0-55vdc from the panel or does it also have built in cut out solar voltage cut offs, resulting in the same issue as the cheaper Ebay charge controllers?

I guess I am looking to have some device which converts the 0-55Vdc to a more usable 12-15vdc range so as to charge the batteries. Is the Victron charge controllers able to do that, regardless of the voltage from the solar panels are producing?

Kind regards


John asked
mdbrown commented ·

4 Answers

Existing multiplus parallel setup needs to accomodate 3phase load

Hi! o/

I presently have 2 x 48V 3000 VA Multiplus VICTRON PMP483021010 in parallel connected to a LiPo Freedom Won 20/14 LifeP04 KWh battery working great in an offgrid config (+ victron solar gear charging + genset).

Soon I will need to add two three phase devices as load 400 V AC (+-15%) / 3 ~ max actual 32,6A. In addition I need to accommodate the current maximums allowed by my current setup (<=6000W peak, ~4400W sustained on single phase max ambient temp 40C in summer). The three phase loads will never be used at the same time as the max output of a single phase. This is for a small workshop, it's either or, never both. The three phase loads are large compressor + plasma CNC.

Below are the options I think I have. They are in order of preference by cost:

  • Option 1: add additional Multiplus in parallel allowing sustained ~6600w on a single phase + appropriately sized Variable Frequency Device (VFD) devicre to connect the 3 phase load.
  • Option 2: All Multiplus identical: phase 1: 2 x multiplus, phase 2: 1 x multiplus, phase 3: 1 x multiplus - will this work?
  • Option 3: 3 phase: each phase as single Multiplus 48/3000/50 + additional separate single phase circuit with Multiplus 48/5000/70.

Are any of these options non viable? Are there better options? Ideally option 2 would be 3 phase solution with a single phase using the Multiplus 48/5000/70 + the other 2 phases using my existing Multiplus 48/3000/50s - but I am told should never happen and Bad Things(tm) will happen - and so is excluded for that reason.



nanzikambe asked
Guy Stewart (Victron Community Manager) answered ·

1 Answer

#1 Device switched off

Hi All

Looking for some brainy Victron experts to help me with a problem installation. (Background: I work for a company that installs alternative power systems and we install 5-6 systems a month, predominantly using Victron Energy equipment)

The setup:

3 x Quattro 15kVA in an off-grid application using AC & DC-coupled solar on a Pylontech battery bank.
4 x Victron SmartSolar 250/100 Solar Charge Controllers
1 x Fronius Symo 15.0 AC coupled PV inverter
12 x Pylontech US3000 Lithium Batteries
Victron Cerbo GX with Touch Display

Setup: Off-Grid with a generator (80kVA)
PV Inverter Support Assistant installed

I get sporadic occurrences of notification #1 Device Switched Off, where the Phase 1 master inverter simply switches off.

What I have tried:
1. I have updated to firmware version 476 and replaced all VE.BUS cables with Victron supplied cables.
2. I have also tried replacing the phase L1 master inverter with a new Victron Quattro 15kVA Inverter.
3. I have tried to analyse all the available data on VRM, but I cannot see any drop in DC bus voltage, an overload from AC output or excessive generation from the Fronius PV.

When it occurs, all of the LED's on the Phase L1 Master simply go out, and the other two inverters present an LED sequence indicating that they are missing (not detecting) the master.

30s later the Phase L1 master restarts and the 3 inverters begin inverting again. No alarm in the VRM alarm logs. Only a notification on the Victron Cerbo GX indicating #1 device has switched off.

Would really appreciate some help.

Nicholas Herbst asked
marekp answered ·

1 Answer

Equalization not possible for Victron off-grid AC coupled and DC coupled systems.


I have spent many hours and days to make my offgrid system to perform an equalization charge on my OPZS batteries. I am now almost absolutely certain that my system will never manage to perform it properly unless Victron makes changes to the process. To be more specific.

I have a Multiplus 24/5000 an MPPT 150/70 (2000W panels installed) and a fronius 3.0 (5000W panels installed) on the ac out.

If I programm the MPPT to perform an automatic equalization, it will start the process after it has finished the absorption face. But as soon as the voltage increases the ac coupled Fronius dicreases its output to 0W and stops taking care of the AC loads of the house. So the MPPT power is distributed to the AC loads and what is left tries to equalize the battery. If the ac loads increase the things get even worse! The Fronius continues to give 0W an the the demand of the AC load comes from the MPPT and from the battery! So although there is plenty of solar power to manage the load and perform the equalization the fronius stays closed and the battery starts to discharge! Even if the volatge of the battery drops bellow the float voltage, the fronius stll stays closed!

If I manually start an equalization on the Multiplus together with the MPPT, thing are better, but the Fronius only gives a small percentage of the loads and does not give its full power.

If on the other hand I try to start an equalization only on the Multiplus from the CCGX, then the MPPT switches of and the fronius has to take care of the loads and the equalization at the same time.

This is very disappointing ! Practically my batteries will never equalize and they will be finally damaged.

Is there any change that Victron will improve the firmware of the Multiplus so it can take care of the loads when the MPPT is trying to equalize?

In the pictures below you can see that the MPPT is trying to cover the loads and the equalization while Fronius is closed.


Vangelis Beligiannis asked
seb71 commented ·

2 Answers

MyPv Ac-Thor AC coupled off-grid system settings

Hi All,

I'm planning off-grid system with PV and wind turbine. Based on the initial research I think that MyPv Ac-Thor is able to work as a dump-load for the wind turbine. I would also like to include a hot water boiler as prime excess power load.

I found this page but there is no information about how to configure AC PV Inverter.

If I "define Frequency start value 50.1Hz and the Frequency end value 51Hz" in Quattro and Ac-Thor my guess is that AC PC inverter should have some offset e.g. start 51Hz end 52Hz. If all three have the same range PV Inverter will lower it's output so there won't be excess power for Ac-Thor, am I right?

I would like to use dump load only for wind turbine after boiler reaches target temperature. I'm not sure if this can be achieved using only one Ac-Thor.


Two units with following configuration seems to make sens:

1. First Ac-Thor 50.1Hz - 51Hz -> hot water boiler

2. AC PV Inverter 51Hz - stop

3. Second Ac-Thor 51Hz - 52Hz -> dump load for the wind turbine

Am I missing some better solution?

Thanks for your help!

dyju711 asked
thomasw-1 commented ·

1 Answer

Combine AC charging with alternator and MPPT in my 4x4 vehicle

Hi Community,

I would like to ask you for support in building a complete power supply and battery charging solution (starter battery and aux battery). I have several assumptions and I am looking for a victron combination of solutions that will optimally solve my challenge in terms of cost. Those are:

  1. when parked in front of the house, charging is to be done from the AC socket
  2. while driving, charging is to be done from the alternator
  3. during a stop in the wild, charging is to be done from solar panels on the roof.

I am not sure how to build such a system to meet all of the above. I will be grateful for your help



maciej-stolarek asked
JohnC answered ·

2 Answers

Battery voltage drop when high load is connected


I have installed the following off-grid system, which has been working pretty good for one year.

  • 4 300W solar panels
  • SMARTSOLAR MPPT 150/35 48V
  • 8 Acid Lead batteries of 6V each (Deka GC15)

However I'm wondering if the behavior I see when I plug a 1200W water heater during the central hours of the day is expected.

As you can see from following graphs the battery voltage drops when load is active and jumps back to an higher value afterwards.

Reading other posts on this subject I've got this is expected indeed, but my question is: do I have to worry about this voltage drop? In other words: should I power on the AC generator if the battery voltage goes down to 46V like in the picture below?

Thanks a lot,




the-salmon asked
the-salmon commented ·

2 Answers

On Board 12V supply

Hello wanted to power a 12V DC cellular router from a 12V supply that remains active even when inverter is shutdown. Where would be the best point to get that supply from on a Victron system

red-dirt asked
Justin Cook - Bay Marine Supply USA answered ·

3 Answers

Smartsolar 75/15, Hardcoded Voltages of load output mode "always on"?

Hi Smartsolar- Users :-)

I run a SmartSolar 75/15 together with 12W Solar Panels und a 12V (4S) Winston LiFeYPo 90Ah Battery in my Caravan.

Battery setup is kind of "90% full is enough -Setup" with 14V/13.4V/14.3V/30days balancing. HAve 1,7A Balancer boards on every cell.

Usually, i run the load output in mode "always on" when i use the caravan.

ATM, i am on holiday in Kühlungsborn at the Baltc Sea Coast, where Weather was quite bad. So i only got 130Wh loaded into the Battery the last 4 days, while i used 880 Wh for TV etc., all shown on the Victron Connect app.

Today, i noticed (from my gas warner beeping all the time when getting power, was the only device obn battery power at that time, taks 0,1A) that the load output switched off and on every few seconds. So i checked the battery voltage in the app: as far as i remember, it was at 13,2v.

That is way to early to switch off the battery power; these cells do have ca. 1200 Wh from 4,1V down to 3V/ cell.

Date shown here:

Now, i changed the load output mode to user "defined 2" with off <12V and on >14,4v

I thought "Aways on" would mean" always on? Does anyone know if there are voltage limits in mode "always on"?

Best regards from Germany...


topsan asked
topsan answered ·

1 Answer

Can the PV inverter support assistant be configured to start ramping down at 57.6v instead of 54v?

At the moment the absdorption saying is 57.6v for absorption but the PV inverter support assistant ramps down Fronius when the batteries are at 54v so it takes far too long to charge the batteries under solar. When the generator is on, it will charge at 180amps until 57.6v then go into absorption then float as it's supposed to but when it's under solar it will charge at 180amps to 54v then ramp down considerably so even though the charger wants the power the PV inverter assistant won't allow it. Can the setings be changed in the PV inverter support assistant to chasnge it from 54v to 57.6 as per the charger setting?

daren-connor asked
Paul B commented ·

1 Answer

Phoenix Inverter into power distribution panel of house

When I bought this inverter I specifically asked if the output was 120VAC-on-black and 0VAC-on-white; they indicated "yes". But of course they lied. Like many inverters it presents 60VAC-on-black and 60VAC-on-white (as measured from the ground plug).

I'm trying to marry the output of the inverter into my new off-grid home's power distribution panel. I also purchased a 2-pole safety switch. So I have the black and white outputs running through each of those poles for the sake of safety before then going to the power distribution panel. That said, I find that if I keep the ground wire connected to the chassid of this panel then the white "half" of the power remains hot even if a circuit breaker is in the OFF position. So by disconnecting the ground output from the inverter at least that doesn't happen, ignoring the safety implications for a moment...

And yet, under any load it trips the 15A circuit breaker. Granted, this is a GCFI-incorporated breaker which is likely my problem at the moment.

Has anyone successfully managed to do what I'm trying to do? Is there a way of converting the 60/60/ground output into the more typical 120/0/ground?

outsourcedguru asked
outsourcedguru answered ·

1 Answer

Small kits for villages in Nigeria?

Good Morning,

I would like your opinion for the kits that will be for Africa.

All material will have to be from Victron and will be installed in villages without electricity in Nigeria.

Our client asked us if it would be possible to make kits of different powers for basic consumption with autonomy only for a few hours at night (250w and 375w are just led lighting and charging cell phones, the 800W for led lighting and a refrigerator) where a small generator can be coupled (Kit 4, 5 and 6).

Kits without Generator connection

250W Kit 1

1 MODULE Victron 175w Monocrystalline

1 Blue Solar MPPT 75/15

1Phoenix 12/250 230V Ve. Direct Schuko

1 Victron Energy 12 V 60 Ah gel battery

375W Kit 2

2 MODULO Victron 175w Monocrystalline

1 SmartSolar MPPT 100/20

1Phoenix 12/375 230V Ve. Direct Schuko

1 Victron Energy 12 V 90 Ah gel battery

800W Kit 3

2 MODULE Victron 360w Monocrystalline

1 Blue solar MPPT 150/45 tr

1Phoenix 24/800 230V Ve. Direct Schuko

2 Victron Energy 12 V 90 Ah gel battery

Kits with possible connection of generators for battery charging

800W Kit 4

2 MODULE Victron 360w Monocrystalline

1 smartSolar MPPT 250/70 Tr Ve.can

1 Victron Multiplus 12/800 / 35-16

2 Victron Energy 12 V 90 Ah gel battery

1200W Kit 5

3 MODULE Victron 360w Monocrystalline

1 Blue solar MPPT 150/45 tr

1 Victron Multiplus 12/800 / 35-16

2 Victron Energy 12 V 90 Ah gel battery

1.6kW Kit 6

4 MODULO Victron 360w Monocrystalline

Victron Easysolar 24/1600 / 40-16 MPPT 100-50

2 Victron Energy 12 V 90 Ah gel battery

antoniomoura asked
michelg answered ·

1 Answer

Multiplus 2 configuration with solar, battery, and grid input.


I am designing a system with the following components:

-1x multiplus 2, 3000w/48v inverter,

- 2x smartsolar charge controllers,

- approximately 2.5kw of solar

-1x fortress eflex, 5.4kwh LFP battery

The system will have an AC input which will normally be grid power, but can also be a generator if the grid goes down. (There is an existing generator interlock in the main panel that will supply power to the multiplus)

The output of the multiplus will energize a newly constructed critical load panel.

The goal of the system is for the inverter + battery to keep the newly constructed panel "off grid" and run primarily off the solar + battery. If solar is not sufficient to keep the battery recharged I would like to have the multiplus pull power from the grid as needed to meet the energy needs of the critical load subpanel.

Can anyone detail the necessary settings(or additional parts that I am missing) to have the system configured in this manner?

gspsolar asked
marekp edited ·

2 Answers


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