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Did the MPPT destroy my batteries because of faulty BMV?

When I came back to my boat after being away for 6 months, the voltage on my lead batteries was about 3V. I could not understand what had caused this, as everything except the BMV and the MPPT with solar panels was disconnected.

I bought new batteries, and then I saw that the BMV displayed 0,2-0,3V lower voltage than the MPPT. The BMV was tested by my dealer with same result, and has now been sent to Victron.

I had set the MPPT to use the voltage from the BMV, as adviced in the manual. I guess this means that the MPPT constantly thought that the batteries was not fully charged, and probably have overcharged them.

Does this seems like a plausible cause for the death of my batteries?

kodax asked

0 Answers

Globallink 520 Multi Rs Solar Dashboard
Greetings to the community, I have a Globallink 520 and Multi Rs Solar and BMV712 installed, how can I see the overall view from the dashboard the setting with overview disappears immediately and can't see anything as the overall view like in this image?
Thank you

                 



[image]

energie-utechnik asked

0 Answers

Can BMV-712 smart history be exported/saved?

BMV-712 Smart with 2 BattleBorn 100Ah, PD 9160ALV, Factory 300W solar, Factory Cummins Genset in our RV. On extended trip, went for a period of 11 days where no charge source could get the SOC back to 100% (hovered between 71-83). Still trying to diagnose and figure out what the precipitating event was and would like to save the BMV history for review before I pull the batteries out for winter storage. Is there a way to do that ideally to my PC? I have no internet in the RV unless I turn my phone into a hot-spot.

Thanks in advance.

ajg617 asked

0 Answers

Deactivate low battery alarm for 12 hours, Victron BMV-712

Hi, I wonder if it could be possible to add a feature to disable the battery alarm for 12 hours?

A few times we have reached low voltage overnight when it hasn't been practical to run a generator, and have had to turn the battery alarm off to sleep. It's easy to forget to reactivate the alarm in the morning, and then run into low charge levels by mistake. I can't imagine I'm the only one who has had this problem.

Thanks!



ezshay asked

0 Answers

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
Fra commented ·

0 Answers

BMV712 shows 99,1% soc but VictronConnect shows 100%

Particular when being mains charged via my IP22 , my BMV712 display shows 99.1% or a little less then 100% for a long time , but the VictronConnect main page for the BMV712 will show 100% ( which is correct by the way , as the IP22 status page will show the battery is in “ storage mode “ )

I can manually synchronise the display to 100% but it seems odd the VictronConnect is different to the bmv lcd.

goboatingnow asked

0 Answers

BMV-501 positive Ah reading

I have a boat with a Victron MultiPlus 12-3000 and a BMV-501 battery monitor. When I am moored up on a landline for long enough, the control panel shows 'float' and the monitor 100% charged. When the charge reaches float, the monitor resets automatically. All good. However, the Ah reading then increases from zero to a number that depends on how long I stay on the landline. Over winter it can read hundreds of amp-hours before I reset it. What can a positive Ah reading possibly mean when the batteries are 100% charged? Is this normal? Shouldn't the Ah reading remain on zero when the batteries are fully charged? Before I leave, I reset the monitor each time so that Ah is zero. Not a big deal, but a long-standing mystery.




stevelb asked

0 Answers

BMV-702 with multiple ground points

I’m installing a 702 with 2 battery banks. I can run both battery negatives to the shunt and the shunt to ground. But… the system has a second run of the negative bus to ground. Will this affect the monitor readings?

Thanks

jak asked

0 Answers

BMV relay controlling charge sources based on SOC? Victron lithium system.

I'm working on a customers narrowboat in the UK which has had a Victron lithium system fitted by another installer a few months ago. I've attached the orginal installers diagram which is how it's all been installed.

I've been asked to sort out alternator charging - Removing the CL 12/100 (which doesn't work and installer saying the latest version isn't like previous ones they used) and fitting a Mastervolt Alpha Pro external regulator to the Beta 43 175A alternator (using BMS charge disconnect signal to control).

I'm questioning how the state of charge relay is being used to break the Charge Disconnect signal from the VE.Bus BMS. As soon as the BMV hits 100% the allow to charge signal is broken and turns solar and alternator charging off so there's no real length of time in absorption. The cells in the 3* 160AH Smarth Lithium batteries are balanced according to the app.

Is it recommended that the BMV relay be used like this? Can't see it on any of the official schematics.. edit.. just spotted this one here https://www.victronenergy.com/upload/documents/DS-Lucians-Victron-Van-Automotive-Alternator.pdf

Wonder what other people think and if there's an official recommendation?

1. I could leave BMV relay as it is controlling the Mastervolt Alpha Pro and SmartSolar.

2. BMV relay just controlling Alpha Pro. Smartsolar left with standard lithium profile with fixed absorption time to ensure cell balancing.

3. Remove the BMV relay control completely.

Thanks for any advice, Ed

[image]

MatildaSchematic.jpg




fc-marine asked
fc-marine edited ·

0 Answers

VictronConnect app on MacOS feature request

Hello Everyone,

Would it be possible to integrate the current date and time (including seconds) into the app; the motivation behind this is that it is sometimes unclear as to whether the app has timed out or stalled hence displaying historical data.

Best regards
Stephen

bazil asked

0 Answers

BMV 602 History Readings

The BMV 602 is not showing the following history entries:

H3. Average discharge. 0.But this should show something averaging out the previous discharges over a timescale?? Which is how long back??

H4 Discharge cycles. 0.Why not count each discharge??

H5 Full discharges. 0. Haven't had any.

H6 Culmulative ah. Actually shows sysmbols. So I guess over counter.

All others work perfectly.

I wonder why?

crms asked
Matthias Lange - DE commented ·

0 Answers

BMV-712 not showing actual current

I saw a few post regarding inaccurate readings with the BMV-712; my issue is with current. I have a aims AC-DC battery charger set up to charge (2) 48v Lifepo4 batteries. My particular set up has the charger hooked up to a power strip rated for 12amps max. While adjusting the current output on the charger to make sure not to go over 12amps, I noticed my clamp meter on the circuit for that outlet was showing a different current than what the BMV shows while charging. Clamp meter shows 6.5amps, while the BMV app shows 11.6amps. I have the charger negative connected to the main lug on the load side, so not sure what else could be throwing off the current reading. I have nothing else charging to the batteries and the the inverter is off. Same goes with when there is a load, the BMV always shows more current being drawn than what actually is shown on the clamp meter. Any ideas?

abauti asked
Mike Dorsett commented ·

0 Answers

BMV-712 voltage measurement and Smart Sense temperature to SmartSolar controller same time

Hi, I have BMV-712 with 24V lead acid batteries. It measures midpoint and total voltage. Can I have Smart Sense temperature measurement same time to SmartSolar 150\35 or equivalent controller?

Do SmartSolar controller use midpoint measurement in any case?


I'm asking this because 3 batteries which have died in three installations duting last 2 years lost one cell becoming 10V batteries. And controller did boil other half because it detected total voltage only.

lomalainen asked

0 Answers

BMV700 connected to NMEA2000 Network / Raymarine i70 can't scan the network

Hello

I have bought the VE-Direct Cable (ASS030520310 ) to connect a BMV700 to the NMEA2000-SeatalkNG network of the boat

I can display the Voltage, Ampères,and SOC on each display (Raymarine Axiom and i70, B&G Triton), this is OK.

But since, the Raymarine i70 can't scan the network anymore to define data sources. So I can't choose the RS150 antenna as speed (SOG) source, and the i70 displays "---" as speed.

If I disconnect the VE-Direct cable, the i70 works fine again.

The i70's firmware is updated. The version of the VE-Direct cable is 1.00. Is there a newer version ?


Best regards.

FX

van-thuan asked

0 Answers

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