2 of 4 - Explanation of Victron Energy Lynx Shunt

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  • Опубліковано 30 вер 2024

КОМЕНТАРІ • 45

  • @mikeunum
    @mikeunum Рік тому +4

    Victron, goed gedaan en het zijn top producten die ik al zo lang inzet voor klanten en die zijn helemaal blij.

  • @damianhla
    @damianhla Рік тому +4

    Thanks for the good overview.
    I bought the Victron Lynx Shunt to replace the Victron SmartBMS 712, in order to upgrade the current handling capacity to 1000A.
    But i noticed a few differences. Some although is annoying, i can have workarounds. Others it look like either a firmware or software bug that needs to be addressed by Victron.
    First and foremost issue is the missing DC power consumption in VRM. This was working fine when using the SmartBMS 712. Once upgraded to Lynx Shunt this information is missing. There is only solar energy captured. This issue has been reported by others users since 2021. I am wondering when Victron plans to fix this issue?
    Second issue is the loss of decimal precision in VRM battery SOC. It is only display a zero after the decimal point. It is doing the same in the remote console as well. The SmartBMS 712 provides one decimal precision in battery SOC and this is quite vital information as the battery approaches to full charge. I hope Victron can really address this too.
    The third issue i noticed is that the Lynx Shunt is reporting a voltage that is lower than the Smart BMS 712 and also the Victron Smart Sense for voltage and temperature. In my case it is 0.08v lower. When i force the Cerbo GX to use the SmartBMS as BMS, voltage seen by the other 8x SmartSolar controllers are correct, plus the presence of the Smart Sense actually allows its voltage to take priority over those from 712, which is a good feature as this would be more accurate. They are the same value in my setup. But you can see each SmartSolar reports that it is using Smart Sense voltage and temperature reading in the VE Smart Network.
    Now once i switch the BMS selection to auto, Cerbo GX picks the Lynx Shunt as BMS. And all the 8x SmartSolar now sees a lower shared voltage. This is concerning as i don't want to overcharge my LFP batteries. But since i now know the voltage offset, a workaround would be to change the charging profile of each SmartSolar and lower the values by 0.08v. I have monitored this workaround and it is working just fine... but it is annoying. Why can't the same preference to the voltage be given or made as a selectable option in SmartSolar for the readings from Victron Smart Sense. Surely this would be more accurate. There seems to be some inconsistency in the programming, as this works fine with Smart BMS 712, but once BMS is Lynx Shunt, this information from Smart Sense is ignored by all SmartSolar controllers. 😢
    I really hope Victron can address these issues for the Victron community, as these are great products. Just needs a firmware /software update.

    • @BartBourgeois
      @BartBourgeois Рік тому +1

      I bought the Victron Lynx Shunt to replace the Victron Smart Shunt 500A, in order to upgrade the current handling capacity to 1000A incombination with the Lynx distributors.
      But so far not impressed, seems rather an expensive mis-buy. Except for the 1000A capacity (which I would have gotten with a SmartShunt), all other features lack and important details missing. Making the entire Lynx setup not worth it sadly.
      >>Second issue is the loss of decimal precision in VRM battery SOC.
      +1
      Also seem to be missing the "history chargedenergy" and "history dischargedenergy" values, these work perfectly for integrating ESS performance into Home-Automation.
      Missing these makes the device obsolete.
      Really hope these issues can be addressed with software/firmware, the Lynx line-up are really great quality products, easy to build a nice a robust system would it not be missing basic features. It's hard to believe a device 2,5x more expensive as the SmartShunt 500A does lack all this.
      Plan B is to kick out the Lynx Shunt, ebay it, replace it with a SmartShunt 1000A, ruin the look of the installation, but get all the features.

    • @damianhla
      @damianhla Рік тому +1

      @@BartBourgeois All valid point. My main focus of building my Offgrid solar based on the 1000A Lynx busbar is to remove the busbar being the bottleneck when handling high current charge /discharge and fully leveraging on my LFP's high performance 100A charge and 150A (continuous) / 270A (peak) discharge capabilities. In my setup, the battery system is split into 4x subsystems and they all merge at the 1000A Lynx busbar system. Each subsystem has its ability to take 400A charging and provide 600A discharge continuously. If i wanted to micromanage i could have run my SmartBMS 712 on each. But i have chosen a much less invasive technology. Instead of relying on a shunt, thru which current must flow through, i have deployed power meters that are Bluetooth equipped and based on Hall-Effect sensors. The Hall-Effect sensors runs off the Industrial 400A DC circuit breaker, which acts as safe guard to each battery subsystem, protecting both the positive and negative terminals. The 400A is chosen based on the 400A charging limit for each subsystem. With four subsystems running in parallel, my design can provide a maximum of 1600A charging and 2400A discharging without breaking a sweat. Each subsystem runs on a 500A flexible busbar system. So all connectors are over-specs to ensure the full system runs cool and without stress. This dramatically improves the reliability. No more hotspots detected when running my regular thermo imaging analysis. And i have full instant feedback from each battery subsystem. I can easily take one or two battery subsystem offline for maintenance and the rest will continuously service the system without any noticeable degradation in terms of performance. Having very high redundancy and extra capacity in handling max charging /discharging is the key towards building a fault tolerant Offgrid solar set-up, allowing to have a very high redundancy in solar input to cater for less than ideal winter weather, during which the system has to grab whatever it can, which sometimes can be short bursts of very high current charging. Having a 500A busbar limit is simply not an acceptable parameter in my system design, especially when the full capability is above the 1000A limit, at 1600A charging and 2400A discharging.
      I highly recommend the hall-effect based power meter that supports Bluetooth technology for monitoring. You can find them on AliExpress. These sensors measures the change in magnetic field on the conductor and doesn't intervene the current flow like the shunt design, which is quite old technology.

    • @BartBourgeois
      @BartBourgeois 11 місяців тому

      @@damianhla Damn, I thought I was overdesigning/overspeccing my system, but what you are saying does resonate and makes me wonder.
      I took another approach but will certainly give this idea a go.
      Currently have many different monitors running at the same time, just a try-out and cross-checking.
      Since my last post, the Lynx shunt is reduced to a low-level double-check device, but does not in any way interact with the system. Its now a very expensive, nice looking, backup for the backup of the backup not doing anything monitor.
      I''m nowhere nere the Amps you are talking about, have lots of capacity, but mostly max 120A in, average 40A out, piek 400A out in my 20KvA system.
      Thats for the tip about reducing hotspots, reducing stress, safe guards an improving reliability... certainly will start some experimenting on this.
      But keeping on topic, the lynx shunt sadly did not deliver what it could've been.
      Keep it on, thanks for insight!

  • @magi-jd2ug
    @magi-jd2ug 9 місяців тому +1

    @johannesboonstra6917 what voltage tolerance/accuracy does the Lynx shunt have?

    • @JohannesBoonstra-ol2nz
      @JohannesBoonstra-ol2nz 8 місяців тому

      thats comparable with the other monitors, pretty accurate , ±0,01A
      /
      ±0,01V

  • @Nixontheman
    @Nixontheman Рік тому +2

    I’d be fine, if it was 1/4 the price.

    • @johannesboonstra6917
      @johannesboonstra6917 Рік тому

      If you could help us to make it cheaper, please do

    • @Nixontheman
      @Nixontheman Рік тому

      @@johannesboonstra6917 ok, Step One, enact Jack Welches Vitality Curve.

  • @kasperholmj
    @kasperholmj Рік тому +2

    I'm sure it's a very nice device, but I still don't understand why I need it...
    I've got 3 x Multiplus, 2 x Lynx Distributors, 1 x 150-100 solar charge controller, 1 x Cerbo. Plan is to use 3 banks of 4 x Pylontech US5000. Nothing is hooked up or connected to eachother yet.
    The Distributors holds the fuses, the Pylontech banks are communicating with the Cerbo which knows the input from solar and output through the Multiplus. What would I get by adding the Lynx Shunt?
    As far as I understand by splitting my two Lynx Distributors with a Lynx Shunt in between, and then put the Pylontech banks and the charge controller on the left side and the MultiPlus on the right side, will only give a much greater pull of energy through the busbar as opposed to know where I've distributed my devices evenly across the two Lynx Distributors...

    • @FFdo.
      @FFdo. Рік тому +2

      instead of the lynx shunt, you could install the old smartshunt in the negative of the "first" distributor you have connected your batteries, basically the shunt will allow you to see the loads of your entire system, increasing accuracy, now if you are happy with your current setup. there is no need for it.

    • @johannesboonstra6917
      @johannesboonstra6917 Рік тому

      @@FFdo. when you have a smart battery like the Pylon and no DC system (beside the MPPT), there is no need for a Lynx shunt indeed and the battery will tell you the SOC

  • @markusviel6440
    @markusviel6440 2 дні тому

    I still dont understand why the @Smart Shunt and the Lynx Shut have different Design Philosophy , only the smart shunt adds DC Loads .... so WHY , argument that whith a Customer some Name but ...

    • @JohannesBoonstra-ol2nz
      @JohannesBoonstra-ol2nz 10 годин тому

      Because the Lynx shunt is ment to be in a DC distribution system between batteries and system, as its to bulky to have a few here and there to measure DC loads, then the Smartshunt is way handier.

  • @unimog404
    @unimog404 Рік тому +1

    Very nice system. Would be nice if there was a main disconnect module. I see alot of people using main switches. And they connect them directly to the busbar. But it doesn't fit that well. And when using this shunt It should go between the shunt and the distributor.
    And maybe add a remote function for the main distribution switch with a relay 😃 probably not a cheap solution 🫣

  • @Just_An_Idea_For_Consideration

    QUESTIONS:
    I want to use the lynx system with non victron inverter and battery
    1) can the shunt power the lynx distributor led board
    2) can the lynx shunt monitor the charge and discharge of eg4 batteries but still allow eg4 batteries to communicate to eg4 18kPV inverters?
    3) As a suggestion it would be nice if there was a blue matching end (within the lynx products), to place over the left exposed bus terminals, for cosmetics.
    thx

    • @johannesboonstra6917
      @johannesboonstra6917 Рік тому

      the Lynx Shunt is not able to forward this , only the Smart Lynx BMS can do this at this moment . Current measurement is no problem, but communication with non Victron inverters is not possible. The cover for the busbar is there out of the box already

  • @BicycleLee
    @BicycleLee Рік тому +1

    can the Lynx shunt be used with only the Lynx distributor and not with a Cerbo?

    • @johannesboonstra6917
      @johannesboonstra6917 Рік тому

      Hello, the readout needs to be done with a screen or such, so a CCGX/VenusGX /Cerbo or Ekrano is needed

  • @WildEden
    @WildEden Рік тому +1

    This shunt does not have the vital mid point battery monitoring making it redundant for many installations.

    • @johannesboonstra6917
      @johannesboonstra6917 Рік тому

      The main reason for these are state of charge calculation I would say …

  • @RandomPenner
    @RandomPenner 4 місяці тому

    Hi Victron.
    The shunt is rated for 1000A but there are no fuses for that current.
    I need 900 amps to go through the shunt.
    Can you give me a recommendation how to solve this issue?
    Thanks a lot
    Greetings

  • @flaviod.9537
    @flaviod.9537 Рік тому +1

    Please, say more about VE.can to NMEA2000! In my system there is 3mppt’s, 1 Shunt and 1 Gerbo in the CAN. To use the CAN to NMEA micro-C cable should I remove one of the terminators?
    What else do I need on NMEA side(Raymarine)?Hope I am not making any mess…

    • @johannesboonstra6917
      @johannesboonstra6917 Рік тому +1

      does this help? www.victronenergy.com/live/ve.can:nmea-2000:start

    • @flaviod.9537
      @flaviod.9537 Рік тому +1

      @@johannesboonstra6917 thank you. I need to make some tests with the VE.can terminators. I will first connect the entire victron ve.can network(5 or 6 pieces) via Gerbo to N2K, as a drop, removing all 2 terminators from the ve.can nttwork. If I need to put one ve.can to n2k cable to each victron hardware, it will not work for me…
      The text says:
      3.3 Terminators and network layout
      A N2K CAN-bus network needs to be laid out as in a backbone configuration, using drop cables to connect to each device. Also, there should be only two terminators in the network. Therefore:
      Use the NMEA 2000 cable as the backbone.
      Run a separate drop cable separately to each Victron device VE.Can to NMEA 2000 cable
      Only terminate the NMEA 2000 backbone. Do not install a terminator in any of the VE.Can ports on the Victron products.
      Or:
      Have the N2K network on one side, with one terminator. On the other end, change to the Victron network, with also one (Victron) terminator at the end.
      The first option is more aligned with the official N2K method. But, in case of multiple Victron products that need to be connected to the N2K network, will require more wire runs and definitively more NMEA2000 to VE.Can conversion cables.

    • @johannesboonstra6917
      @johannesboonstra6917 Рік тому

      @@flaviod.9537 ? the Va Can needs the terminators to be able to work.

    • @flaviod.9537
      @flaviod.9537 Рік тому

      @@johannesboonstra6917 sorry to bother you so much. Thank you for your kind help. And thank you for your very nice videos!!
      Let me try to explain my point. I have only one VE.can to N2K micro-c cable. They are very expensive and difficult to find here in Brazil!!
      I have 2 nets I would like to connect:
      1. VE.can
      Terminator/Cerbo/Mppt1/Mppt2/mppt3/shunt/terminator
      2. N2K
      Terminator/backbone/terminator
      From the link above I understood I can connect the cerbo as a drop to the N2K backbone without terminator on the cerbo. Sure the N2K will keep the 2 terminators.
      How can I connect the Cerbo as a drop and still have the other victron devices connected to the cerbo using the VE.can?
      My plan is to remove the VE.can terminator now on the CERBO, so I can free one of the 2 cerbo ve.can ports to connect the cerbo to N2K as a drop. The N2K will keep the 2 terminators, and will have the Cerbo connected as a drop on one of the cerbo VE.can ports. My plan would be to keep the other VE.can port of the cerbo connected to the victron devices(mppt’s-shunt). I do not know if I need to keep or not the other terminator on the shunt, that would be the very end of the “drop” (cerbo/mppt1/mppt2/mppt3/shunt) added to the N2K backbone…
      Once again, thank you so much for your patience and help.

    • @johannesboonstra6917
      @johannesboonstra6917 Рік тому +1

      @@flaviod.9537 the CAN network needs the terminator, going from the CAN towards the Micro cable you use the NMEA terminators

  • @earlzeis35
    @earlzeis35 7 місяців тому

    Has there been any hardware and/or software updates/upgrades to the Lynx Shunt? Is there a new Lynx Shunt being released?

  • @AntoineGrondin
    @AntoineGrondin Рік тому +2

    It's a shame that you can't flip the left/right sides of the shunt. It really constrains installations and it should be possible in software to just invert the numbers. Alas it doesn't appear to be supported, so my shunt is right now a glorified, very expensive fuse holder.

    • @johannesboonstra6917
      @johannesboonstra6917 Рік тому +1

      ? you can install the Shunt upside down so left/right changes as well.

    • @AntoineGrondin
      @AntoineGrondin Рік тому +1

      @@johannesboonstra6917 to flip it I need to flip all the other components and now my cable layout won't work anymore. I really expected that this could be flipped in software (my fault) but was really shocked to see it's not. I don't understand why this wouldn't be a software option, it's literally a sign flip.

    • @garyo4135
      @garyo4135 Рік тому

      Totally agree, be great if they could be swapped around.

    • @johannesboonstra6917
      @johannesboonstra6917 Рік тому

      @@AntoineGrondin well its not just a software thing, there is hardware (like the power supply) also there , swapping will effect a lot

    • @AntoineGrondin
      @AntoineGrondin Рік тому

      @@johannesboonstra6917 the power supply and hardware works fine one way or the other. It's really just the current counting that's flipped.

  • @cskeise
    @cskeise Рік тому +1

    💙👊😎

  • @TheMaschine555
    @TheMaschine555 Рік тому

    Is it possible to calibrate the voltage of the Lynx Shunt? The voltage reading is 300mV too low. There are threads in the Victron Community Forum reporting this issue but no solution. Voltage measurement done with Benning MM7-2 (0,03% + 2 Digit; 60000 count).

    • @johannesboonstra6917
      @johannesboonstra6917 Рік тому

      No its not, make sure the connection to the battery (inline fuse and such) are as loss free as possible.

    • @damianhla
      @damianhla Рік тому

      I noticed a difference with Lynx Shunt vs SmartBMS 712 and Smart sense for voltage /temperature as well. I my setup this difference is smaller at 0.08v.
      One way may be to allow a voltage offset to be set in Cerbo GX Lynx shunt settings so that the SmartSolar will pick-up an accurate shared voltage from the Lynx Shunt. But a far better way is to take this reading from Victron Smart Sense. When Cerbo GX uses SmartBMS 712 as BMS, it is smart enough to use the voltage from Smart Sense to override those from 712 in all SmartSolar controllers. But as soon as the BMS selection is set to auto in Cerbo GX, it picks the Lynx Shunt and this preference is gone or ignored. I hope Victron can fix this software bug 😅