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Victron LiFePo4 90Ah and Low temps

Hi,

I have 4 LiFePo4 90Ah batteries that are about 6 years old. They are not the smart model, but do have BTV leads to connect to a VEBus BMS.

The system will be setup in a location where on occasion the batteries could experience temperatures of 0deg C.

I will be purchasing a smartshunt in order to measure consumption/soc etc.

If I purchase the temp sensor for the smartshunt, will this cut the charging current from both multiplus and victron mppt if the temperature drops below 0deg C?

I also have a Color Control GX that will be installed with the system and connected to the smartshunt and mppt via V.E direct. The CCGX will also be connected to the multiplus via V.E Bus.

Thanks

bones83 asked
Matthias Lange - DE answered ·

3 Answers

SmartShunt and Smart MPPT 75/15 current draw

Hello all, first post here.

A couple of days ago I installed a SmartShunt 500/50 and a 75/15 Smart MPPT controller in a motorhome. When everything is off and nothing can be used the shunt is showing current draw of 0.10A to 0.20A.

According to the datasheets, the MPPT has self consumption of 10mA, and the SmartShunt is <1mA. 11mA combined for the two. However, I'm drawing 10 to 20x more. The accuracy of the shunt is ±0.1A, so shouldn't it be reading 0.1A as a maximum? I appreciate this is a minor amount... I'm just curious as to why the numbers are 10 to 20 times out.

---

A couple other question while I'm here:

Is there any value in creating a VE network and joining both devices?
For the shunt, I only updated the battery Ah. Did I need to do anything with other settings and options (Sync SOC, zero current calibration, charged voltage etc)?

I didn't really know anything about solar and electrics before this, so it's been a steep learning curve! Many thanks in advance.

pablo79 asked
pablo79 commented ·

2 Answers

networking options for MPPTs and shunt

I am rebuilding the charging system on my boat (700 Ah Firefly battery bank). I have two 150/70 VE.Can MPPTs and a smart shunt on the ground return. The MPPTs are VE.Can cabled to a cerbo GX and the smart shunt is connected to the cerbo via a VE.direct line. The 1200 W solar can deliver up to 100 amps at peak into the batteries. A few questions:


1) is the network between the MPPTs and shunt done over Bluetooth or does the cerbo broker the conversation using the VE.can and VE.direct feeds? I much prefer hard wired connections


2) depending on (1), I may need to downgrade from a smart shunt to a shunt that has analog sense outputs that can be used by my new wakespeed 500 alternator regulators, as they don’t yet have support from Victron to get the VE.can data from the cerbo (per wakespeed rep). I love my smart shunt but without analog sense wires I’d either have to put another shunt in series or just swap out the smart shunt for an older one with both VE.direct and analog out.

mike-miller asked

0 Answers

2 questions about position of Smartshunt and its connections

Dear Victron-fellows,


I have 2 questions about adding a Smartshunt to my system. The picture displays a simplified situation: 2 batteries in parallel, fed by a dynamo, Multiplus and MPPT (via Argofet). Now I want to add the batterymonitor and 2 questions have risen:

- Does it make a difference (or is it good or bad) on which of the 2 batteries the VBatt+ of the shunt is connected (A or B in the drawing)?

- I know I have to connect the shunt to the battery-minus without any other connections on that side. Since I have 2 batteries in parallel, I suppose the right position is C? Problem is that there is hardly any space over there where the minus-cables comes together and I have to use long(er) cables. On position D it would be much nicer (together with A for the powersupply / +). Is this a go or a no go?

Hope to hear from you

Kind regards,

Pim

[image]

pim asked
seb71 commented ·

1 Answer

Smartshunt divides the datas vu 3

A proffesionnal installed a SmartShunt 500A/50mV on my Lithium battery in our Camper (not a lithium battery)

After 2 weeks of use and strong investigation, with the professional too, thé conclusion is :

- the figures given by the Smartshunt are clearly wrong : the current (and Watts) are divided by 3...current IN or OUT

- the cables and wires are good...

- the parameter are good (zero curent etc...)

Do you have any Idea of what could be wrong ?


Thank you

xdorland asked
marc-de-montreal commented ·

4 Answers

SmartShunt 500A Red Wire Fuse Information

I blew the small glass fuse that goes in the red power wire for the SmartShunt 500A. Finding a replacement is proving difficult. I can't believe the fuse information isn't cited in the manual. Stunning omission. Between my smartphone & a magnifer, I can read some information off the fuse, but when I type what I see in a search, I'm not sure I'm finding the correct replacement.

Anyone been there & done that?

Victron - what the heck were you thinking by not including that information??

victronlfs asked
Matthias Lange - DE answered ·

5 Answers

SmartShunt placement for best Bluetooth connectivity

I'm about to purchase a SmartShunt -- love the concept!. I see in this forum there are some folks experiencing Bluetooth connectivity issues. As with any radio, it can be interfered with by EMI and metal structure obstruction. I plan to use the SmartShunt in my 5th wheel. The front compartment has the batteries, charge controllers, etc. and all electrical wiring. I suspect quite a bit of EMI in this compartment. Since all current goes through the negative side of the shunt, near-to-battery placement makes sense to reduce current loss... in other words, the Bluetooth transmitter is located next to the worst EMI.


Where is the best placement for the SmartShunt?

malibudave42 asked
seb71 commented ·

1 Answer

Smartshunt inaccurate SOC

Hi Guys, Thanks for the great community and support, I have always found this forum to be extremely helpful.

I seem to have an issue with the Smartshunt State of charge in a recent installation.


I have 8x 90AH 12v Yuasa batteries in parallel totalling 720AH.

I set the minimum discharge floor to 60% as my usage is minimal and I would be surprised if I reach that below 80%.


Now the Smartshunt indicate total consumed AH to be -48.1AH and the SOC to be 97%. I think this is inaccurate


Now if I do my math ( I could be ignoring many factors)

according to the set discharge floor of 60% I have 40% usable.

40% of 720AH = 288AH

Expected SOC = 100% -( 48.1/288)x100) = 83.2%

and not 97%

I am confused. can you please help :) below are screeshots and battery specs.


Many thanks



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[image]

[image]

vanlifer007 asked
vanlifer007 answered ·

3 Answers

SMartshunt says the (lithium) battery is full after a few minutes of charge from the solar panel/ Bad setting of parameters?

A professionnal installed me the SMartshunt 500A last week.

I remarked two things :

1) the discharges are a little bit less than I expected (example : when I turn 2 2Watts lights, the smartshunt says count only 2Watts)


2) more important (but point 1) is maybe linked to point 2)) : a few minutes after the solar panels start charging the battery...the smartshunt say the battery is full...but it clearly does not correspond to the sun power I have^^ (the VE.Direct SMart on my MPPT charger said around 2-3 Amps go to the battery...so the 15 Ah that needed to be charged cannot be charged in 10 minutes^^)


I live in a motorhome. The battery is a 110 Ah Lithium.

I think the professionnal installed weel the shunt.

I think there is something wrong with the parameters of the shunt (At the beginning, I forgot the to set the "Charged voltage" parameter...it was 0.0V ^^)

==> I set the "charged voltage" parameter at 13.2V as said in the manual...but the manual is only about lead-acid battery...and I have a lithium battery. Maybe is it because of this?


==> How would you set the "Charge voltage " parameter for my lithium battery (considering that the "Absorbtion voltage" of my MPPT charger is set as "14.2V" (default value for lithium batteri". Do I try to set the "charge voltage" of the shunt at 14.0V as said in paragraph 10.3.8 of the manual? https://www.victronenergy.fr/upload/documents/Manual-SmartShunt-EN-NL-FR-DE-ES-SE-IT-PT.pdf


(I set the "Additional settings for lithium batteries": Charge efficiency at 99% , Peukert exponent at 1.05)


Best regards.

xdorland asked
seb71 commented ·

2 Answers

Differing voltage between SmartShunt and voltmeter

I recently bought and hooked up a Victron SmartShunt. It works like a dream on BlueTooth, and I thought this would be an accurate view of my battery state/usage.


For storage I have two Valence, 40ah RT Series 12v batteries hooked up in parallel. There is a substantial discrepancy in the voltage between my Klein voltmeter (MM300) and the Victron SmartShunt (500a) as follows:


Load (amps)
SmartShunt
Voltmeter
Difference
0 amps
13.15 volts
13.24 volts
.09 volts
4 amps
13.09 volts
13.19 volts
.10 volts


I have measured for voltage drops across my various connections and there are none. I have calibrated the SmartShunt to 0.0 amps under zero load conditions. But these should not be implicated in any of the voltage discrepancies. I see it as a battle between the Voltmeter and the SmartShunt.


The only remote caveat might be the Epever MPPT connection. The MPPT battery minus is connected to the 'system minus' side of the shunt, and the battery plus goes to the 150a circuit breaker, which goes to the battery. The circuit breaker is closed. Yet, I do not see that as influencing the differing voltage between the two devices.


Has anybody else come across this issue? Does anyone have some wisdom on this matter?

martyfarkle asked
martyfarkle commented ·

1 Answer

Smartshunt and Peukert coefficent?? Doubts...

Goodmorning everyone.

I bought victronenergy Smartshunt.

I must say that I am extremely satisfied with the accuracy of all the measurements.

Comparing the readings from TracerAn 3210 Epever and Smartshunt, they are surprisingly nearly identical, in both current and voltage.

They differ only by 0.02A and 0.02V. That is practically zero.


However, I am not convinced that the Peukert coefficient works.

In theory, by increasing the coefficient, the remaining runtime should shorten as the discharge current increases.

But it's the other way around:

for example, with a discharge current of 3 amperes, if I put coefficient 1.5 there is more time remaining, compared to coefficient 1.0.


The percentage of SOC also increases as the Peukert coefficient increases. I expected the opposite.


In my case, the statistics with default coefficient 1.25, seem too optimistic and less realistic than coefficient 1.0 or 1.1.

Can anyone clarify this for me?

francesco asked
francesco commented ·

3 Answers

Doubts Smartshunt cycle counting.

Good evening, I have been a very satisfied Smartshunt owner for about 2 weeks.


But I have some doubts.

1) I would prefer victronenergy to change the cycle count setting.

In fact, the software only counts a cycle when the battery drops below 65%. This is misleading.

I use a total of 190ah on the camper and the average discharge is 10/15%.

It may turn out that an Agm battery reaches the end of its life and the Smartshunt records only a few dozen cycles.

When in reality the battery has done the 1000/1200 cycles of 15/20% discharge.Cycles that are not counted by the Smartshunt.

Fortunately, the synchronization count is more realistic. Since a synchronization is counted every time the Soc goes below 90% and goes back to 100%.

So I associate the synchronizations with the number of cycles.

It is not possible that in two weeks of daily use it has only 2 cycles.

In reality I am 15 cycles of 20% of discharge... in fact I have about 15 synchronizations.

Otherwise my batteries will die with only 10/20 cycles recorded.

francesco asked
JohnC answered ·

2 Answers

Smartshunt Charge Efficiency percentage
Good evening, I ask another question about the recently purchased Smartshunt.
The Smartshunt compensates the count of the charged energy with the parameter "charging efficiency".
This parameter is default 95% for Pb batteries.
Currently in my Smartshunt there are 3.2kwh of energy charged, and 2.8kwh of energy discharged.
This is much less than 95%.
Why?
Does this mean that the actual efficiency of my battery is around 89%?
Or does it mean that the Smartshunt uses this parameter in other values and not in this data (energy charged / discharged) ??

francesco asked
francesco commented ·

1 Answer

Disconnect SmartShunt when disconnecting battery?

I have a 100ah lithium battery in my RV. I disconnect it when storing or when I'm connected to shore power for more than a week.

While my battery is disconnected, should I disconnect my SmartShunt from the battery? And how much power does the SmartShunt draw when it's passive (not connected to a device via Bluetooth)?

mistere asked
Kevin Windrem answered ·

1 Answer

VRM monitoring site shows wrong data when bulk loading battery

Hi,
I have a multiplus 12/1600/70, a battery, a smartshunt and a cerbo.
All connected the way they should be, the smartshunt directly at the - of the battery, no mistake there.
When unloading, the vrm portal shows correct data.

However, when loading the batteries with the multiplus, I get the following data

[image]


This is not correct.
The only DC consumption I have is the shunt itself and the cerbo and that should be no more than 4W.
There is no AC consumption AT ALL, ie : nothing is connected on the AC-side of the inverter.

Any ideas for this?


ps : latest firmware on all devices

carl-dewever asked
carl-dewever commented ·

1 Answer

SmartShunt without power

Hi,


Quick question: I wired the SmartShunt at the negative terminal of my battery, and the little power connector to the positive terminal of my battery.


If I remove the power connection for the SmartShunt, will it still allow current to pass through and can I still use my battery as usual, just without any monitoring from the Shunt?


Best

glesage asked
Matthias Lange - DE answered ·

1 Answer

Use solar and not 240v charger when sunny

I'm in the process of installing a MultiPlus, Cerbo GX, SmartShunt & SmartSolar.

During the summer, a friend of mine, mainly uses solar to charge his batteries, and then using the relay on a BMV to switch on the charger if the battery volts drop below a defined limit. Last year 99% of his elec was provided by solar.

I will not be having a BMV, is it possible to get my system to switch on/off the charger in a similar way?

jokani asked
Matthias Lange - DE commented ·

1 Answer

Smartshunt vehicle chassis grounding

Hi there, I am going to be adding the Victron SmartShunt to my van setup to help monitor my auxiliary battery. Everything is currently wired per the diagram below. The battery and fuse block are grounded to the vehicle chassis.

My question is, how/where should I ground the battery/fuse block to the vehicle chassis when using the SmartShunt? None of the diagrams in the manual show the battery being grounded. I know everything will work without it, but isn't it best to ground the battery to the vehicle chassis?

Thanks

[image]

westy81van asked
westy81van answered ·

3 Answers

Smart Shunt, Victron Connect with Huawei P8 lite

Hi all,

I recently installed the SmartShunt in my car to monitor my second battery. Unfortunately I have difficulties accessing the SmartShunt via Victron Connect on some of my Android devices. I only managed to get access on my Lenovo Tab2 with Android 6.0.1.

So far so good but I'm having trouble connecting the SmartShunt with my Huawei P8 lite (Android 6.0). I get to the point to enter the pin code but then the app just stays at 80% and not proceeding any further. Any ideas to solve this?

Additionally I've an Android 10 radio installed in my car. Here the Victron doesn't even see the SmartShunt. Any ideas here, because it would be nice just to use the car radio to check the batterie status.

I'm looking forward to your replies.

hajoge0815 asked

0 Answers

Smartshunt resetting to 100%

I have recently installed a Smartshunt wired to a CCGX which in turn is wired to my Multi. The Smartshunt is also wirelessly networked to multiple MPPT's. All is working perfectly, except that every morning the Shartshunt resets itself to 100%. Possibly on some signal from the MPPT's once they start delivering?

Is there some setting I am missing?

meshugga asked
JohnC answered ·

1 Answer

Does Smartshunt see current coming into battery?

I have a SmartShunt and a CerboGX (this is in anticipation of adding more Victron gear). I don't currently have an inverter and my charger is not Victron. Right now, my dashboard basically just shows the battery SOC constantly declining but I'm wondering if that is correct. Shouldn't the shunt see the charge current coming into the battery?

crholliday asked
crholliday commented ·

2 Answers

Has anyone had trouble with iPhone connecting to BMV 712?

Have new BMV-712 that trying to connect to my iPhone. It does not connect, getting to around 60% and restarts attempt again.

Have tried "normal" BT linking through Victron Connect, have tried deleting from iPhones BT list and have tried accessing it via iPhone BT direct.

Are there known problems with iPhone connectivity.

kathys asked
falco answered ·

1 Answer

SmartShunt Amps out & amps in not match ?

Hi,


Smartshunt wont show correct amps out.

When Victron AGM battery fully charged I usually have 4-6 amps left in "Consumed Ah" just before it resets to 100%

On smartshunt I adjusted Charge efficiency factor to 99% without any significant results.

What else can I do to reduce the difference please?

Using Orion Smart TR 12/12-30 to charge battery.


@markmoto

markmoto asked
markmoto answered ·

2 Answers

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