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Smart Shunt inacurate

I use a Smartshunt in series with a shunt in my DIY-BMS which is very accurate. (Booth in minus string).

Whan I switch on a 10W load, my BMS shows 10W, the smartshunt shows 25W.... what is wrong here? Defect? Or the Smartshunt is in general so inaccurate?

(the problem is not the 0 point calibration, the values above are deducted from other loads)

Another point is:

I activate in Venus DC System.... Sometimes Venus calculate PV Power - consumers = DC System value, sometimes Venus use the value from the Smartshunt!

Everything not so dramatic, 10W or 30W (a Shelly for 15 EUR is much more accurate), but Venus calculate the charging power for the battery related to the consumers. This is dramatic!!

buddhafragt asked
Trevor Bird answered ·

6 Answers

VRM not mapping AC loads from Smart Shunt on inverter

Hi All,

I installed my second Smart Shunt to monitor the DC current pull from my (non-Victron) inverter. It appears to be installed correctly and when I turn the inverter on, the Smart Shunt will show a current usage of about 2-3A (this is what I expected to see). However, when I view the Dashboard in VRM, the current draw doesn't map specifically to "AC Loads" and there is no current visible in the "AC Loads" block - it just sends the visual representation to the general system where it disappears. I can see the Smart Shunt in the Remote Console and it is setup as a DC Meter in "Inverter" mode via Victron Connect. I've restarted the GX device (a raspberry pi in my case) to no avail. Is there a setting I'm missing? I obviously would like it to visually map correctly but also, and more importantly, would like to be sure that the MPPTs are being alerted to the additional current draw through DVCC so that they can compensate while charging.

Should also probably mention that I have a second Smart Shunt configured as a DC Meter in "DC System" mode which reads correctly in VRM - I also have "Has DC System" enabled so that is where that shunt is mapping to.

I have a BMV-712 as a traditional battery monitor which reads correctly. Its possible that I misunderstand the DVCC implementation - would the GX instruct the MPPTs to compensate for the total current being drawn according to the BMV or will it specifically only add the current being reported by the DC Meters (and if so, will it account for both of them if they are in different modes)?

bradley-thompson asked
bradley-thompson edited ·

0 Answers

Using Smart Shunt as DC Load meter - VRM is not mapping correctly


I have setup a Smart Shunt as a DC Load meter in my RV setup. I basically want the Smart Shunt to report the current being used by the DC loads in the RV so that the MPPTs can compensate for it when they are charging the batteries. However, it doesn't seem to be working/reporting correctly. For instance, when I turn on DC loads (lights in this case), the amperage is reported in VRM as going to the general system, not DC loads (note in last picture that the DC meter reads 0.0 amps being used but 22-28w seem to be outflowing constantly). Is VRM working correctly?

Some details:

* Smart Shunt is configured as DC Meter (currently specified as General Loads in misc. settings)

* I'm using DVCC - SVS, SCS enabled.

* I have no way of tracking current in AC loads/sources in the VRM system - I'm looking to add at least another Smart Shunt on my inverter if I can get this working correctly.

* I have the "Has DC System" setting enabled in my GX unit (a Raspberry Pi running VenusOS Large in my case).

* I can see the DC System in the main VRM screen.

System configuration:





bradley-thompson asked
bradley-thompson answered ·

2 Answers

Smart Shunt and Phoenix strange behavior



I use in a Island setup a Victron Smart shunt (500A/50mV) to measure the current from the battery to a Victrom Phoenix without and a 48V/12V Inverter for 12V LED lighting.

If the 48V/12V Inverter sucking energy, everything is a s expected, the Smart shunt shows a negative energy consumption. But if the Phoenix sucking energy, the energy consumption is POSITIVE!!

What is wrong here, someone have a idea, what is the problem?

buddhafragt asked
Trevor Bird commented ·

1 Answer

How to control Battery charge current with ESS + DC coupled feed in

Hello community, i have a very interesting Question from my side because no one can answer me this. Also not my Victron parts seller.

  • Standard ESS System with 3 or 6 Multiplus. 48-54V System!
  • A Few Victron MPPTs
  • Cerbo GX
  • Shunt

Over the DVCC there is a current Limit for Battery. If the DC coupled feed-in is OFF, then everything is working fine and you can limit the current for the Battery with the DVCC Limits.

But if the DC coupled feed-in is ON, the cerbo-gx ignore the DVCC settings accordings victron manual and also tested in reality. The MPPTs need to be always on full power, to be able to feed in.

But how can i control now the Batterie current? Also the DVCC Voltage Limit doesn't work. This was my second idea, to adjust for example 45V Limit, then the Multiplus should move the MPPT Power into the grid, but it doesn't?!

I want to prevent overcharging the Batteries, so activate some current or Voltage Limit, that the Batterie will not rise up more and more. Doesn't matter a few amperes in or out, but should be around +-5A. So the MPPT power should be used for the house + grid if the shunt shows 100% and then the multiplus should control the shunt current to 0A.

Is there any parameter to write in Node-Red to Limit the battery shunt current? Normally DVCC, but system doesn't listen to it with DC-coupled mode! Thank you a lot!

kevstone122 asked
wolferl answered ·

16 Answers

MultiPlus Compact and MPPT non agreeing on Bulk/Float


I have a 200Ah LiFeP04 battery being charged by both MultiPlus Compact 12/1600/70-16 and by SmartSolar MPPT 75/15

When the system is attached to the mains, I have seen situations (i.e. early morning) when the MPPT start charging in Bulk mode while the Multiplus is in Float mode. why is this happening?

The MultiPlus is connected to the same VE.Smart network as the MPPT using the VE.Bus SmartDongle. In the system, we also have a SmartShunt 500a

VE.Smart Network details:

  • MultiPlus (SmartDongle): transmits battery voltage and battery temperature
  • SmartShunt: transmits battery voltage and battery current
  • MPPT: reads battery voltage and current from SmartShunt and BatteryTemperature from SmartDongle

Any suggestion? Thanks

amidships asked
amidships commented ·

2 Answers

SmartShunt and DC POWER

Hi All, I have a small system intallalled on my boat, Rasp with 2.93 venus OS, one multiplus 1600 and one smart shunt, I'm using the Multi for battery SOC and the Shunt, configured ad Energy meter,for the DC boat loads. All fine, but on the overview page of the of the venus, with " HAS DC SYSTEM" activated, no loads are displayed, if i open DC power tab, it shown : other devices not shown on overview page and there I found the Shunt. Also In VRM portal DC power is empty Anybody can help me in solve this, How I can display smart shunt readings into DC POWER? Many thanks for who can help me.



barman asked
pwfarnell commented ·

2 Answers

MultiPlus ii 12/3000 - System info, Shunt Size and Earthing Requirements

Please see attached drawing for my proposed system - I have already bought the Multiplus ii 12/3000 and 4 x Bosch L5013 Leisure batteries.

I have seen in the Victron wiring unlimited info that the 12/3000 may need a 1000a shunt, is that correct or will a 500A be sufficient? I was planning to buy a smartshunt.

Wiring to/from the inverter and battery bank interlinks are 2x50mm2 with 2 x 200A fuses to protect the inverter connection. Also a 300A on the negative side of the leisure battery bank to protect that from vehicle short. Are any other fuses required/too small or large/in the wrong places? Hopefully my drawing is clear enough!

Also I have read about it being undesirable to go from TT to IT in terms of earthing arrangement, do I just run the CU earthing to the vehicle ground which is also connected to the earth of the inverter? I presume the inverter deals with fault current by linking the neutral and earth internally when the shore power is disconnected?

Any advice relating to any of that is helpful, thank you in advance! Is a BatteryProtect a good item to add to the system also? Where would this go? is anything else worth adding? I want no displays internally, all off the phone if possible, to go in a 7m class A motorhome.


joe90k asked
joe90k commented ·

2 Answers

Monitoring LTO batteries with Victron

I can't find this info anywhere, are there any specific SmartShunt settings in VictronConnect for an LTO battery? Thanks!

rthorntn asked
Alexandra answered ·

1 Answer

Suggestions for improving Victron Connect

hello, after 2 years of use and study I noticed fews things that Victron products can improve a lot with little effort.

1) the count of the cycles of the smartshunt and of the various models of BMV.

A cycle is only counted under 65% ..

This is incorrect in my opinion for lead acid batteries one should count a cycle even at 90% or 85%.

IN my RV the system is correctly sized, the batteries are agm for 178ah, and the photovoltaic of 450 watts.

I live in a pretty good climate and never run out of batteries below 80/85%.

So no cycle counts, apart from synchronizations.

This also leads to an inaccurate reading of the average discharge.

In fact, the average discharge is based on cycles and not on synchronizations.

In fact, I have average discharges of 25/30 ah and this is not detected, since my battery pack is 178ah and I never discharge below 65%. actually never below 80%.

2) it would be nice if the victron Connect app for the smartsolar also displays the internal temperature of the solar controller.

This temperature is certainly detected by the smartsolar but is not displayed.

3) it would be nice in the "trends" section to be able to cross the curves of 3 values and not just 2.

For example "battery voltage + battery current + soc".

it would be nice if the AH count was implemented in the historical trends of the smartshunt. Instead it is the only data that is only available in real time.

4) it is a pity that a small economic accessory is not available that records in a memory all the data of historical trends in CSV format to be exported.

The trend is only available on the App for 46 days and the possibility to save the history every 30 days (but only manually) from the smartsolar.

When I had the Epever-based system, a simple object costing 20 euros would record months of data at a time in. CSV.

I hope these suggestions can be taken into consideration, at least in part… at least the talk of battery monitor cycles.

Fra asked
mark-a edited ·

2 Answers

SmartShunt DC Meter for Bidirectional Inverter/Charger

Hello! If I were to connect a SmartShunt in DC Meter mode to monitor a bidirectional inverter/charger, which DC meter mode would be the best to select? I want to be able to see both when my inverter is drawing power from my battery as well as how much power is going into my battery when I am plugged into shore power and am charging via the same inverter/charger. Is this possible?

stefprez asked
bradley-thompson commented ·

1 Answer

Wind Turbine Integration with Cerbo GX & SmartShunt

Hi all - Having used these forums for the research/planning, I wanted to share our successful experience with adding a 400W Wind Turbine (Primus Air Silent X) to our Victron-based solar power system and enabling remote monitoring capabilities via the Cerbo GX and VRM.

We installed this on Greens Ledge Lighthouse - which is about 1 mile off the coast of Norwalk, Connecticut. We have ~3kwh of solar capacity and wanted to add wind to help provide supplemental power in the winter months, given our abundance of wind resource.

To enable remote monitoring, we used a SmartShunt configured as a DC Energy Meter. We initially set it to "Wind Turbine" but this did not show up in the VRM (only accessible via the VictronConnect app and Remote Console).

When changed to "PV Charger" it showed up in the VRM alongside the solar panels, and this has been a good setup for us. We're able to see real-time production in VRM, see historical production via a device widget in VRM, and track the cumulative output via the VictronConnect app.

Production-wise - we've been monitoring it for about 2-3 weeks and are on pace to produce about 20kwh for the month. It has a steep power curve, so the vast majority of production comes when winds are in the 20-30mph range. We produced about 3-4kwh in a 24-hour period when we had ideal conditions.

When wind speeds are below 20mph or above 30mph - the output is generally minimal. However - the unit is not optimally positioned (about 20-30% of the wind is blocked by the lighthouse), so others may have better experience in lower and/or less turbulent wind conditions.

We're happy with the production and are considering adding a second and perhaps a third unit. We'll attempt to optimize over the coming season and report back any significant findings.

We post updates about the restoration work and the off-grid systems on our Instagram and Facebook if folks would like to follow us and/or ask any questions.





Greens Ledge Lighthouse asked
kevgermany edited ·

4 Answers

Smartshunt SOC suddenly jumps to 100%

Smartshunt 500 connected to a 100 Ah 12V Lithium battery. Consumed Ah was 73.1 and SOC showed 27%. I then connected a Victron10A battery charger and the system charged up to just below 40% and then jumped up to 100% SOC. Actual battery charge is below 40% and not 100%. This is confirmed where battery charger shows it charged only 12 Ah.

fretief asked
kevgermany answered ·

3 Answers

Globallink 520 & VRM solar and battery data widget

Last week I added a Globallink 520 to my (small) solar setup.
I want to use it to monitor remotely solar and battery levels.

Hooked it up, added both my SmartShunt and MPPT 75|10 controller via bluetooth and I was online in a few minutes.

I could see the data from both the devices and both battery charge and solar was shown on the widgets on my phone and on the VRM's dashboard.

After a few days the SmartShunt was no longer seen by the Globallink.
I posted about it here:

The battery charge indicator on widget disappeared from my iPhone and from the VRM's dashboard.

All my devices are within one metre from each other and doesn't seem to be too much interference.

I bought a VE cable, just to be on the safe side and connected the shunt to the Globallink directly.

I could see the battery data flowing in, but still no widget.

I removed and re-added and renamed the Shunt and the battery charge indicator came back, but now solar disappeared.

Removed and readded/renamed solar, but still no indicator on the widget/dashboard.

I tried restarting the globallink to no avail.

Current status:




Devices seen in the VRM, the names are correct:


Advanced view, you can see data from shunt and mppt:


But on dashboard, just battery:


Anything else to try?

Thanks in advance for any help!

er-minio asked
er-minio commented ·

2 Answers

Smart Shunt 4.13 update changed consumed amps?

Cerbo GX latest firmware beta v3.00-20

SmartShunt x2 both v4.13

SmartSolar MPPT RS 450/100 x2 both v1.11

Inverter RS Smart 48v/6000va v1.11

1830Ah AGM Battery's

16.5Kw of Solar

Hi just you do and my consumed amps went from -117.4 to -91.33, guessing there was a calculation error that was fixed or is it something else?


(Note to mods - sorry if this should of gone into a different section please feel free to move if thats the case)

nesswill asked
nesswill commented ·

3 Answers

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