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SmartShunt configuration on starter battery

My Fairline boat will be installed with a SmartShunt, but I am a bit confused on how to connect the negative wire from the starter battery. The question is whether connect to "system side" or "battery side". I have seen 3 different pictures. Two of the pictures are from different versions of SmartShunt Manual and the 3rd one is from Solarquip web site where I bought my SmartShunt.

For me it makes more sense to connect to the "battery side".

One of the pictures in the manual also shows connection to the start-engine and alternator. That makes sense with one engine, but I have two.

My config is a bit odd (Fairline), where I have 3 batteries connected to "consumtion bank" but also serves as starter/charger for engine no1. And the "starter battery" is connected to starter/charger for engine no 2. I just want to monitor the "starter battery" in SmartShunt, but I think I should not bother about the "system side" of the wiring. I probable need to write down the schema, but hope that someone can explain the negative wiring from the starter battery. The rest I hope I know. Yes, the setup is odd, and later I will reconfigure my system a bit. But as today I have two different banks which are non-connected and no VSR either. And I do have 2 separate chargers.




erik-forslund asked
erik-forslund answered ·

3 Answers

SmartShunt only - why temp sensor

I have so far one single Victron equipment only. No Victron chargers (yet). I plan to monitor two battery banks, so the Aux-cable will go to the starter battery. Then there are no possibilities for a temp sensor via Aux, but I don't see a reason for it in this basic system. Can anyone state this is a right analysis, or do you see a need of having the temp sensor?

erik-forslund asked
kevgermany edited ·

2 Answers

Difference between SmartShunt and Multiplus-II charging readings

Hi dear Victron community!

I have a three phase AC-out-coupled system with Multiplus-II, CerboGX, SmartShunt, Lynx distributor and battery balancers. Battery pack is 48V 600Ah made from 12 pcs of 12V lead acid GEL batteries. Pictures attached. I am interested why I get so different charging values from SmartShunt and Multiplus. The difference is usually around 100 W. And this is 70% difference when battery is full.

The SmartShunt shows correct power when calculated with a simple formula N=UI but the Multiplus power is much higher. Can somebody think of any reason why that is?

Thanks in advance



Karl Laasik asked
Alexandra answered ·

1 Answer

Peak Power Pack and SmartShunt: can I tie all grounds together?

I would like to track the state of charge of my Peak Power Pack, something which is sorely lacking (for the price I kind of expected something like this to be included, actually!). The difficulty is the different current paths, I have the charger connected, the car/solar connector is also connected, and of course the load is connected to the "mover" output. Can I tie all the "minus" connections together (charger, car/solar, load, and possibly even ground), connect this to a smartshunt, and then connect the smartshunt to the PPP? In other words: the minus of the charger adapter, the car and the load are connected to the load side of the shunt, and the other side of the shunt is connected to the mover output minus of the PPP.

mwi13 asked
mwi13 commented ·

1 Answer

SmartShunt DC Energy Meter question

I know this is still brand new and may not be in a production release yet but is anyone using a SmartShunt in DC Energy Meter mode to monitor a 3rd party solar controller? Does it show up on the monitor screen (CCGX/Touch 50)? How about the VRM? I would assume there is or will be a Voltage/Current widget for it?

I'm running the V2.80~33 beta of Venus OS on my Cerbo.


kamflyer asked
nebulight commented ·

4 Answers

Victron SmartShunt as a energy meter?

Does anyone know where I can find info about using a Victron SmartShunt as a energy meter?

I have one being used as my battery monitor, and now got a 2nd that want to hook up to log DC charging from a non-victron solar/DC charger connected to it. With aim that can then include this in stats for day of PV generated vs Consumption, etc.

Went into VE Connect and under setting for the 2nd shunts I changed "Monitor Mode" to "DC Energy Meter", and then the "DC meter type" to "DC-DC charger".



It states it will show on GX Device and in VRM but can only get very basic info shown on later and nothing on my GX device (VenusOS running on a Raspberry Pi)



Searched for documentation for "DC Energy Meter" and "DC meter type" settings but nothing is showing in Victron help or in any forum discussions. So can only guess maybe this is a pretty new feature and most users haven't used or is still in development to integrate better with VRM/GX.

Anyone else successful in this or know where can find info on how to config/etc. Thanks is advance.

ryanlynx asked
Sam Salwei commented ·

5 Answers

Victron SmartShunt bluetooth is busy


I have been using my SmartShunt for some time successfully. This weekend while monitoring my battery from the app it suddenly disconnected and greyed out in the app. Now when I try to connect it says bluetooth is busy.

Here's what I tried, nothing has recovered:

1. Turning off bluetooth on my phone, waiting couple minutes then turning on

2. Setting airplane mode, turning back on after a couple minutes.

3. Rebooting my device

4. Powering off device, leaving off overnight, turning back on

5. removing the SmartShunt from bluetooth settings

6. Clearing app cache/data

7. Removing and re-installing the app

Here's my log:


Can anyone assist?

tomx asked
rmorgansd edited ·

8 Answers

Will the BMS cut off low temperature charge from MPPT to lithium Batteries

I have seen what appears to be two contradictory answers to this question - can someone give me a definitive answer ? Thanks



This is my system .....if the BMS does not control low temperature cut off - I think I can connect the temperature on the Smart Shunt and the MPPT should receive temperature, along with Current and voltage on my VE. Smart Network?


Michael Ziegler asked
Michael Ziegler commented ·

1 Answer

Lynx Shunt benefits compared to Smart Shunt?


what are the benefits of Lynx Shunt compared to Smart Shunt? It has a nice box that integrates nicely with Lynx Power-In, but is that all?

It costs 2.6x more than Smart Shunt.

Smart Shunt datasheet says current draw < 1 mA ~ < 1Ah/month, Lynx Shunt says 20mA @ 48V ~ 14 Ah/month. That's huge difference.

Smart Shunt says resolution and accuracy 0.01A +- 0.4 %, Lynx Shunt's datasheet does not mention those.

Is there any reason to buy Lynx Shunt over Smart Shunt except integration with other Lynx boxes?

mihlit asked
mihlit commented ·

2 Answers

Comment connaitre la quantité d'energie (Kwh) transitant par les batteries ?


Dans la cadre d'une utilisation domotique, je récupère un certain nombres d'informations sur Home assistant via Modbus. Je souhaiterai récupérer les quantités d'énergie stockées et déstockées bar les batteries (en kWh, en Wh, ..., je connais déjà les puissances "instantanées" de charge et décharge en W)). Ces informations sont à priori disponibles mais pas avec le Bus-can.

Pouvez vous me confirmer, comme je l'ai lu sur le forum anglais, qu'il est possible d'installer un SmartShunt de le connecter en, de récupérer les informations sur les flux d’énergie mais de ne pas l'utiliser comme BMS ?

Existe-il un autre moyen d'accéder à ces informations ?

Ma configuration

  • Multiplus II 5000
  • Cerbo gx
  • Batteries pylontech


grichka asked
Thierry Cortassa (Victron Energy Staff) answered ·

1 Answer

A digital display for a Smart Shunt?

I got a 500a Smart Shunt and understand it hooks into the Victron Connect Ap via Bluetooth. That is great and will plan to use it in this manner. However, I would also like to hookup a digital display like the one that comes with the BMV-712.

I have read I can hookup a display using the GX devices but I don't have those and they are expensive. I really don't need all the what the GX devices deliver. I just want a digital display of the battery voltage and SOC for quick reference without having to log onto my phone. Besides there are other people at the cabin that are not going to download an ap to monitor SOC. They just need a simple digital display that they can glance at and know whether the SOC is good or they need to turn on the generator and charge the battery.

Doesn't seem as this should be a problem but it appears to me I need to fork over several more hundreds of dollars to purchase the whole GX stuff to get this. There has to be a way.

Any ideas??

john-strein asked
jwfrary answered ·

3 Answers

SmartShunt setup for LiFePO4

For the Victron SmartShunt with a LiFePO4 battery, the Victron Manual recommends the default parameters with the exception of tail current, Peukert exponent, charge efficiency, and discharge floor. For the last three parameters, Victron recommends Peukert exponent (1.05), charge efficiency (99%), and discharge floor (10%-20%).


- I am using a BattleBorn 100A-hr battery. Does anyone know what the recommended tail current parameter is? With COVID, BB is not answering phones....

- Are the other three parameters reasonable in your experience?

mva asked
snoobler commented ·

1 Answer

Smartshut Won't Stay Connected...

I have a smartshunt attached to the battery of our camper trailer. The first few weeks connectivity was fine, and since then it has been terrible. This is the second time I've been unable to connect via bluetooth, standing right next to the battery and smartshunt (maybe 1 foot away with no metal objects in between). I guess I can un-pair it and re-pair it again, but if I have to continue doing this every time I want to see what is going on with my battery it is going to get old really fast. Any ideas or tips would be much appreciated. I know these devices get very good ratings, but so far my experience has not been good. Thanks.

cohenfive asked
Matthias Lange - DE answered ·

2 Answers

Ruhe Strom Smart Shunt

Habe einen Smart Shunt an einer 160AH Li Batterie im Wohnmobil verbaut.

Jetzt entlädt sich die Batterie, obwohl am Shunt (mittels Knebelschalter) keine Verbraucher mehr angeschlossen sind (Minuspol unterbrochen). Entladestrom nach App ca 50-100 mA/h.

Lt Vitron Angaben ist der Ruhestrom des Shunts nur bei 1 mA.

Muss dafür Bluetooth ausgeschalten sein??

womo21 asked
womo21 answered ·

5 Answers

The longest "VE Direct" cable is too short. How can I extend the reach?

It is approx 60 ft from the batteries to the Pilot House. How can I connect a Smart Shunt to the Cerbo GX when the longest VE Direct cable is only 10 meters (32 ft)?

FYI - This is only tempoary until the LiFePO4 batteries arrive in several months. LiFePo4 batteries will use Lynx Smart BMS and connects to the Cerbo GX via network cables.

gbmd asked
Matthias Lange - DE answered ·

2 Answers

Smart shunt

My battery bank is 250 AH and the smart shunt is saying I used 140 AH so far but is at 63% and the voltage seems low too for the percent of charge.

I have done all the settings in the Victron video and something still doesn't seem right. Any suggestions?


blue-highways-traveler asked
Alexandra commented ·

3 Answers

Smart Shunt Mid-Point Series Parallel

I have a bank for four batteries that are in series/parallel which equals 24 volts (4 - 12v batteries). How can I monitor the midpoint?

dpeter asked
snoobler answered ·

2 Answers

Smart Shunt wiring re-wire

Having upgraded to Lithium and moving my coach battery bank to another compartment I added a Bluetooth Victron Smart Shunt. I have attached a diagram of how I wired it. My question concerns *wire #1 and *wire #2 . Should I leave them as is or reconnect them via the dashed line


rgd asked
rgd commented ·

1 Answer

One shunt, one 2000aH battery bank and 2 Quattros’ and a cerbo and a color gx

Hi all, I have a question I have 2 Quatro each running a separate 230 VAC distribution. So they are not parallel in a master/slave setup.

There is one smart shunt connected to the color GX Which is connected to the first Quattro, The second Quatro is connect to the Cerbo. Both the Cerbo and the Color are connected to the N2K network.

The first Quatro / Color GX set up works fine as the smar shunt is connected there But how do i get the Cerbo to use the same smart shunt ?

I included ome screen shots

Thanks Paul



paul-3 asked
JohnC commented ·

2 Answers

500 Amp Smart Shunt...

Do you have to run the smaller power supply cable directly to the battery terminal or can you hook it to any constant 12v terminal. Wasn't sure if this cable measures voltage of the battery bank or is just a simple power supply? Trying to avoid digging out a bunch of caulk to get the red wire outside the trailer....

ncserenity asked
Matthias Lange - DE commented ·

1 Answer

Smart Shunt accuracy

Is SOC more accurate than consumed Ah as a %?

Have been using the smart shunt for about 6 months and noticed that the SOC is always higher than the Consumed Ah as a % of the battery bank total. I.e.: SOC currently reads 77% and Consumed Ah is -114 of a total of 345Ah (66%) in the battery bank. volatage reads 11.86.

Battery settings are top to bottom:










the batteries re Rolls AGM


simeons asked
Stefanie edited ·

1 Answer

Multiplus 3000 - What else do I need

I have a Multiplus 3000 and a Victron Orion B2B. I am running a Nations 280 amp charger setup for AGM batteries, shore power, and no solar. I'm confused about what I need to monitor and control the inverter. Do I need the BMV712? Should I use a Cerbo GX and Touch 50? Will that do what the 712 would do or do I still need that. Will that give me everything I need? Do I need to purchase a shunt too? HELP! I have a guy who will be doing all this but I don't think he's familiar with all the Victron options.

allemay asked
allemay commented ·

3 Answers

DC-Load Tile not showing up

Hello dear Victron Community!

I have an ESS system with 1x Multiplus2 5kVA, CerboGX, 8.8 kWp solar, 2x MPPTs (250/100, 250/85), 3-phase meter EM24, PylonTech battery (48V, 14.4 kWh) and zero injection.

So far everything is up to date with the latest firmware and everything works perfectly. The CerboGX currently works with the release-candidate v2.80~33.

Now to my problem: I have in addition to the battery a large DC consumer (between 1-3kW), but only occasionally switched on or clocked.

But the tile "DC-Load" is not shown to me neither on the VRM page nor in the remote console, although the DC power draw is known to the ESS system (battery is connected via CAN).

Every now and then the "DC Load" tile appears, e.g. after a restart of the CerboGX, but then disappears again after a few seconds.

The function "DC System present" is switched on.

After research in the forum I found the entry "DC load on CCGX not indicating load" by riclip and realized that probably a SmartShunt is required.

I bought and installed a SmartShunt 500, reconfigured it as a DC meter and connected it to the CerboGX via VEdirect. Even now there is still no "DC Load" tile to be seen!

My portal ID: d4124333c7a6

Any ideas?

Ralf asked
Ralf answered ·

5 Answers

Missing SmartShunt mounting diagram appendix

Hi. The 'Manual - SmartShunt' document indicates that there should be a mounting diagram appended to the manual: "For the exact location of the mounting holes see the dimension drawing in the appendix of this manual."

I failed to locate the appended mounting diagram. Can you indicate where it can be found?

philip-donner asked
philip-donner answered ·

1 Answer

Low Temperature Cutoff not working


I have a Smart Shunt with latest firmware with a networking setup to 2 MPPT 100/50 and 4 Ip22 12/30 chargers.

Everything is using the Lifepo4 profile with a low temp cutoff of 5 degrees C

It simply doesnt work with the charging continuing at 4 degrees C

Everythings firmware is up to date and the synchronised charging works perfectly but alas not so the low temperature cut off

Any ideas as to why?

duane asked
mrbuffer commented ·

4 Answers

Behavior while AC running in heater mode

Hello everyone,
We've had a local company install a solar system for us and it has been working great. I have a concern though about running the AC in heater mode. We're running two banks in parallel of 4 batteries in series, each battery is a tubular 12V/240AH. The inverter is a 5.2KW 48V 230V inverter (we use 220V where I live, 50Hz)

I have a victron smartshunt and I have my inverter connected to home assistant to log the data. I ran the AC in heater mode (~1500Watts) and it ran for 2 hours before the inverter cut off due to low voltage, from 3AM (prior to that the grid was available) to approximately 5AM:


Is this drop in voltage normal? Total home power usage was around 1700Watts, less than 50% the inverter capabilities. it happened twice before I woke up and turned off the heater at 4:50AM. Then without the load the voltage kept recovering. Victron SmartShunt was showing an SoC of 88% around that time.

I am aware under load the voltage drops, but then again state of charge is at 88%, way higher than the 50% I try to stay above as those are flooded lead acid batteries. What am I missing here?

Here's the config for the shunt:


micmak asked
nickdb answered ·

2 Answers

work around for missing smart shunt features

I just got a 500A Smart Shunt - and while it has some useful features - there are some features I expected it does not have:

1. the trend feature in the iOS app forgets everything as soon as the phone goes to sleep or switches to a different app - this makes the trend feature pretty much useless for me

2. there seems to be no way to connect to the PC app via blue tooth

3. I have not found a way to record a full charge - discharge cycle

4. the "low voltage" notification only pops up when you open the app - I would expect it to pop up when I'm in blue tooth range regardless of the app running or not

Are there any simple ways to remedy these "shortcomings" - especially the history recording?

fredi59 asked
Matthias Lange - DE answered ·

2 Answers

Synchronise Smart Shunt SOC reset with MPPT float stage

This is more of a question for the product developers - Can we add an option to reset smart shunt SOC to 100% when a connected MPPT charge controller enters the float stage? I know this wouldn't apply to all systems, but when all your devices are connected using VE Direct with a GX device (Cerbo in my case) all the information is there.

joshua-backwell asked
joshua-backwell commented ·

3 Answers

SmartSolar 75/15s / SmartShunt 500 - Tail Current , Absorption time setting advice please.

I have just completed the install of the below 12v system on my sailing boat and am looking to set up the charge parameters before leaving on a 3 week cruise.

2*SmartSolar 75/15s (networked via VE)

SmartShunt 500 (connected to MPPTs via VE)

2* 165 a/hr 12v AGM Batteries (parallel - 330a/hr total). Brand new , never cycled.

1*82watt panel on own 75/15

2*39 Watt panels connected in parallel on separate 75/15

Battery Data

Absorption - 14.1v

Float - 13.6v

Charge Voltage - 13.2

Suggest default tail current 4%

Max charge 50amp (limited by the 15 AMP MPPT in terms of solar max charge)

The other charge source on the boat will be the engine alternator (115a/hr) which will be run on a totally random basis as needs arise.

There will be various draws on the batteries throughout the day (fridge - 3amp when cycling , water pumps 5 amps when used, GPS , lights etc ). Total draw on any given day is ~50 amps.

My question is what best tail current and absorption settings to use so the MPPTS don't flip into float mode too early when they sense the draw on the battery from the various DC loads?

Any help would be greatly appreciated.

mattplowman asked

0 Answers


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