Hi All,

I am hoping to learn from others and also to find some peace of mind that I have correctly set up my new Victron Connect system. Any thoughts much appreciated.

This is my set up:

• 4 x 110AH AGM batteries (house bank)
• I have 2 x 110w solar panels wired in series
• 1 x 100/30 smart solar MPPT charge controller
• 1 x BMV-712 smart battery monitor

These are my current victron connect settings for my battery monitor and also for my mppt (no sun in Greece today and so I've just put my 50Amp battery charger on!)

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A few of the other things I don't understand. Sorry!

• Why does the 'State' say open as opposed to Bulk/Float?
• Shouldn't it be charging at 14.4V as opposed to 14.2V?
• What should I be doing with regards to 'Synchronising SOC'....'Zero Current Calibration'...& 'Manual Equalization?'

Many thanks

Alex

Is there a way to configure a high voltage cutoff the Smart MPPT 100/30 uses to prevent surges from causing charging voltages beyond specs of battery? I recently got a Gel battery and they are sensitive to high voltages. My charger gets voltage/temp from my BMV battery monitor, however sometimes it misses bluetooth voltage update packets, and on intermittent cloudy days, there can be sudden surges in output current, but if the battery is mostly full already, the voltage will jump as high as 14.85 volts before the MPPT finds out and can back the current off to maintain the 14.2v it should be. Is there some kind of protection setting that can prevent this? This was an expensive battery and I dont want to damage it,

Hi - where does the vehicle chassis ground cable connect? To the load side of the shunt or to the negative battery terminal? Thanks @Steve C

C60FF118-411F-4A4E-9A23-A30B7BD10DCF.MOVI have a new BMV-712 that works great with Bluetooth however the display it came with us missing lines on many of the words that are displayed making in near impossible to understand what is being displayed. Is there a fix for this? I’ve updated the unit to the latest firmware. The picture shows what Ian supposed to be the ending of the word CAPACITY. Video is also attached

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Hi

Building a Solar System Consisting of

24 Panels 6 x 96v strings Southern Australia North & West Facing

2x 250/100 solar controllers

BMV 702

Multiplus 5000/240

CCGX,I have? or go VenusGX OctoGX for VE connections

My Question is how to parallel them correctly (presuming both Battery direct connection ? ) and provide ccgx connection of VE Direct including a BMV

& max length of VE Direct cables for fault free operation

I have a 12V Victron 160ah LiFePO, BMV, MPPT, and Buckboost set up in a campervan. I’m recently seeing low voltage on a single cell in the battery.

The system did a full charge yesterday and now reports an SOC of 62%, with -58 consumed Ah

The MPPT is configured using the preset, and the system has been working for 3 months but clearly something isn’t right at the moment

Any advice to force the battery to equalise or other help would be very welcome

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I have a BMV-712 smart that I would like to control an MPPT 250/100. I have the BMV in relay mode and it is wired in the back to the COM and NO ports. It connects to the MPPT relay plug. I have it in remote mode. I have set the BMV to cut off at 50 volts.The MPPT is charging. To test to see if it will cut off on an over voltage condition, I lower the high voltage relay setting to 46 volts when the battery is at 48 volts. The MPPT keeps charging. How do I get the MPPT to stop charging according to the parameters that I set in the BMV? I would like to also cut off charging at low temperature based on the installed temp sensor.

I have 3 12V 200ah batteries in parallel. I also have victron MPPT charge controller. The charge controller shows roughy the right voltage 13,5-14V, but the battery monitor show .04V. I have tried so many things to fix. I even upgraded to the temp sensor cord, but that didn't help and the temp shows -1C even when the settings say to do F and the temp is way off. I had the cord on the same positive that the shunt was getting negative from, so I moved to the furthest battery thinking that maybe had something to do with it but no. All connections are tight, checked multiple times now. The voltage did show up correctly at one point, I don't know what's changed to make it wrong. I also have tried to reset the device multiple times. Please help!

Hi,

First of all I am aware of the known android issues, and I have gone through the manual and troubleshooting steps. But my device that SHOULD work, doesn't.

The issue: Can't connect via bluetooth with VictronConnect to certain Android devices. PIN code prompt either doesn't come up, or flashes extremely quickly that there is no chance to put anything in.

Not-Working devices:

MY MAIN CONCERN: Samsung Galaxy S8 - running Android 9 (latest OS update available, screenshot below)

Samsung Galaxy Tab A (2016) - running Android 5.1.1 (latest available for this tablet) - Can accept if this device won't work.

Working Devices:

Samsung Galaxy S7 - running Android 8.0.0

iPad running iOS9

I used the ipad to update the BMV to v4.01 (screenshot below), but no change. I have rebooted the devices, checked they are not paired in the systems bluetooth settings. Tried pairing them in there (won't connect). Have rebooted the BMV by pulling the plug. Have used the ipad to reset the BMV back to factory settings. All to no avail. I really need to get it to run on the S8 as that's my device, the others I have borrowed for troubleshooting. Anything else for me to try would be very much appreciated.

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Why the readings no my BMV-17 doesn't match the readings on my multiplus? The BMV reads 100% battery charge and the multiplus 95%.

Hi

I have MultiPlus 12/3000, SmartSolar 100/50, BMV-712 and smart dongle.

What is the best practices to connect battery temp sensor, to smart dongle or to BMV-712's shunt?

Hi guys and ladies

We have the following hooked up to a raspberry pi ( our sweet sanctuary on vrm )

x2 blue solar regulator 100/50 hooked straight in via usb

1x smart solar regulator 100/50 hooked straight in via usb

1x 712 bmv again hooked up via usb

1x multi plus 3000 VA via mk3 usb

They work perfectly in regards to online and communication (which was supprisingly simple to do).

But we have noticed the smart solar is always on absorption (for about an hour ) when the other two are on float.... the only difference I can see is that the bmv and smart are commincating via bluetooh (which I can not do with the other two as they cannot have Bluetooth leads in as well as the cables to the raspberry pi)

Is there some way to network these devices using the pi (vensux gx )

any help would be much appreciated

I have a battery bank on a norrowbaot, charged by an alternator and mppt solar. Monitored using a BMV702.

bMV settings are

Charged voltage 13.2 as recommended in the manual for a 12v system

Tail current 1.5%

When charging via th alternator everything works fine. SOC reads 100 once the current going in drops below the tail current. This is usually when the “current consumed” is displaying at close to 0AH.

However, when the battery is being charged by solar and the engin is not running, the SOC will jump to 100% even when the “current consumed is still way off 0 (maybe at-20AH. If you then start the engine the current going into the batteries will be way above the tail current suggesting the bats are not fully charged.

The issue I think is that the MPPT controller regularly outputs less than the tail current into the batteries ( we only have. Single 160w panel, thus making the monitor believe that the tail current has been reached and the battery fully charged.

2 questions

1.does my assessment of the situation seem reasonable

2. Is there a way to prevent this (maybe by changing the charged voltage or tail current?) would there be an issue changing the BMV charged voltage to 14.4 to match the adsorption voltage set in the mppt controller?

Thanks in advance for any advice

After connecting often comes up 0%

Sometimes come up the actual infos, but when I press settings / batteries there is a blank screen.

Also it reconnects several times per minute

Any ideas ? Thank you for help.

BTW I have a CAT S60 with Android 6...

I have a BMV-712 that is sharing battery voltage and battery temperature with a Smart Solar MPPT 75/15 via VE.Smart networking. I've recently noticed that the temperature as displayed in the VictronConnect iOS app is different units depending on the device I choose in the app's device list. For example, when the BMV is selected, the temp units are set to Fahrenheit and that is what I see on the status page. If I select the MPPT device, the temperature is displayed in Celsius on the status page. I don't see a way to configure units on the MPPT side and since it is a value shared from the BMV it probably shouldn't be necessary to do that anyway. I don't recall this issue in the past, not sure if it happened because of an app update or firmware update. Can someone assist?

I can log the BMV700 output via the serial to USB converter on my laptop and that works very well. I wonder can I do this direct to a USB memory stick without the laptop?

How can I connect the relay terminal of the BMV-712 battery monitor with a BP-100 battery protect? I want to disconnect the battery in case the capacity of the battery has reach a defined percentage. I only can programm the cut off voltage off the BP-100, but I want to use the capacity information from the BMV-712.

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Using 6 12v bat with magna2000 inverter/charger and mppt100/50 solar charge controller. The bm700 will show the ah increasing when sing the onan generator. However, when using the solar system the ah don’t show increasing. I have the shunt connected to the (-) post on batteries and the load/charger side of shunt connected to the magna2000 (-). Why does it display correctly when using gen but not when using solar only? Do I have something wired incorrectly?

Hi, I have a 24v bank comprised of 8x 6v batteries in two parallel strings of 4 batteries. Which string do I connect the midpoint lead to? Or do I need to interconnect the midpoints of both strings (midpoint parallel connection)?

Thanks in advance.

Duane

Today I had my BMV712 batterymonitor displaying 2 (conflicting?) messages while in "float":

1) 100% State Of Charge

2) 1 h 40m from last full State Of Charge.

Can anybody explain this?

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I have a 90ah DIY (4x3.2v) lifepo4 battery that I've assembled. It's comprised of used cells that are somewhat old, so I've done a lot of testing indoors with charging and discharging to see what I can comfortably utilize and calculate my needs. Running 712 BMV, 65a battery protect, 75/15 SmartSolar MPPT.

I'm basically set on treating this battery as having 60ah usable capacity and have done several charge/discharges like this, recharging with an RC hobby charger. If I charge to RESTING 13.34v at terminals (or 13.29 on BMV) I can consistently pull 60ah out of the pack @ 75w continuous draw. With the BMV set to 60ah capacity, I reach zero percent and about 10 minutes later my Battery Protect cuts off (set to 12.55 cut off, rebounds after 75w load is cut to 12.8 or there about). This is perfect for my needs and then some.

So today I decided to do a real world solar test, using the 75/15 MPPT (receiving temp and voltage info from BMV via network). My controller settings are Absorption Voltage: 13.29v (measured at terminals its 13.4). My float voltage is set to 13.25 (measured at terminals 13.28-ish). My charge current is set to 15A to let the max of my 200w series'd panels do their thing.

What I'm observing, is that even though my battery is at 20% capacity as measured by the BMV, the MPPT is only allowing in 45w and is floating - no load. Panels @ 40.78v. It's peak sun right now and not a cloud in the sky, and if I adjust the absorption and float way up, it'll go from 45w to 150+w.

So the charge controller is throttling charging to the battery because the voltage it's reading while charging, and my settings for float/absorption voltage. But the battery only has 20% of my configured capacity in it.

I'd like to charge at a much higher rate in cases like this, since I'm at 20% of my capacity and in the real-real world, throttling my charge current when I'm at a low SOC will surely bite me in the butt if it gets cloudy the second half of the afternoon. What value(s) can I change to achieve this while ensuring that I never exceed a resting voltage of 13.29 @ BMV (13.4 @ terminals). I'm OK if the voltage goes up to 13.7v when charging at 10+a, this was observed when charging with a hobby charger nearing full (and settled off-charge to 13.29@BMV)- and is right about the point when my 6a active balancer board starts to lose control of one cell in particular. But I don't ever want the battery to get charged to 13.7v resting.

Thanks, sorry for wall of text - it probably could have been condensed in to something much shorter but I didn't want to skimp on detail!

I have the following setup: smaller 2015 Lance travel trailer with 2ea 12V lead acid flooded batteries in parallel, BMV-712 and the standard Honda 2kW generator. The trailer's battery charger seems modern (3-stage charging, lots of amps, etc.).

I plan to boon dock (no shore power) regularly and would like to tune the BMV-712 to help keep the batteries charged, healthy, and to know when and how long I should run the generator.

From research, I know I should always keep the batteries above 50% capacity to avoid premature replacement costs. Also, without many hours of charging (e.g., plugged in or on solar), I cannot expect battery capacity to rise above 90% while boon docking.

When charging from, for example, ~60%, the charger will be in the "bulk" mode with high current, and rising voltage. This charge mode is the quickest, but only gets to 80% capacity.

Then the charge mode changes to "absorption" where the charger voltage is held high (14.6v in my case) and then the amps fall off toward ~2amps (in my case) when the charge mode changes to "float" at which the battery capacity is at 90%. To charge from 90% to 100% capacity would take many hours and isn't reasonable while boon docking.

Therefore, while boon docking, I should expect to cycle the battery between 50% and 90% depending on loads and generator run-times.

However, AFAIK, the BMV-712 is designed to treat the 90% charge state as "100% SOC" (?) The BMV-712 decides that when the voltage is the high "absorption" mode, and then the current drops below a "tail current", it proclaims SOC = 100%. But in reality, the battery is at 90% capacity at that moment (i.e., at the end of the "absorption" mode).

If starting from a full-charge (i.e., batteries have been plugged in for a day), the SOC value will be fairly accurate. However, if not starting from a true full-charge (allowing the BMV-712 to auto-sync the 100% SOC value at the end of the absorption mode), the reported SOC value will be 10% lower than reality. So the accuracy of the reported SOC value depends on whether the previous charge completed the float mode? Is this true?

If that's true, then I must tweak other settings to make the SOC value match reality or add-in some fudge-factor or work-around.

I could:

• tell the BMV-712 that the "battery capacity" is 10% lower than the battery specification.
• set my "SOC relay (charge floor)" to 60% instead of 50%, and mentally never let the reported SOC value fall below 60%

Is this a known problem with the BMV-712 SOC value? What do others do to work-around this inaccuracy?

Do other boon dockers have tips on using the BMV-712 to stay confident that the generator is running for the right amount of time?

Thanks!

I initially wanted to post about the relay not working as intended. It actually was Not working as intended I suspect a bug, sorry I have to say it its for the best :)

I was trying to use the charge mode setup with voltage and SOC and of course the relay would not open and close as expected.

What I did *while* writing the previous question I never posted was to go back to the basics and reset, eg. disable all relay conditions. Why? Because I noticed that even with no conditions met at all the relay was in state "closed" which did not made sense at all.

After I did, I re-enable charging mode and only put SOC condition and it worked perfectly. So two things to note: the SOC percentage on the bluethoot are changing at mud percentage, eg change to 97% when on the bmv itself it is still 96.5% so you actually think nothing is working and you start changing things for no reasons which brings the second point: I believe that is you make certain changes in the middle of when the relay is actually calcukating/enforcing things, well it gets confused and does not reset its logic properly.

It would be nice to have double digits % on the bluethoot app AND see in a debug mode what relay logic is actually enforced at a given time.

Hope this helps someone at some point!

Hello,

I have nine devices connected to Color Control GX:

- 1 x main BMV monitor (for SOC calculations)

- 4 x BMV monitors for monitoring "other" chargers (generator, wind, etc.) - connected through USB hub

- 1 x BMV monitoring an independent 12VDC auxiliary battery pack - connected through VE.Direct

- SmartSolar charger

- Inverter

- Recently connected an auxiliary VE.Can device

I'm relying on "Device List" view where I see all the chargers/consumers in one place. Even before adding the VE.Can device, I have noticed that sometimes one of the BMVs "disappear" (shows up as "Not connected"), but it always came back on its own.

Now with the ninth device added, the BMV for 12VDC (connected through VE.Direct one) sometimes becomes "Not connected" and the only way I can fix that is by physically reconnecting.

Any thoughts? Tips on how to fix this?

Thanks!

Good day everybody - I have a PV boat installation with 2 MPPT controllers; one charging the 600A service bank, the other goes to the bow battery bank. Panels are 360WP resp. 190WP.

Because the service bank is more used, I thought about using the relay function of the BMV 712 to switch the 190WP panels to the service bank - after the bow batteries are "full" and in float condition. I want to switch the panel input, not the output of the MPPTbow, because I am monitoring the battery banks with two seperate BMV's.

I found voltage switch conditions in the manual, but no SOC conditions.

Any suggestions would be very helpful!

Thanks, Ole

I have a tystor soft 1210 charger connected to a septer 1275 charging powerbank + starter battery on my boat. My engine generator also charges through the septor when running.

When my engine is running, I can monitor the power going into the battery, but not when charging from the tystor.

Also, when my battery bank is fully charged, and the tystor is active, the tystor acts as powersource (And keeps the batteries topped off), however, the BMW deducts the amps (even though voltage is maintained) from bank and SOC.

Can i fix this somehow, or just learn to live with it and manually set charge to 100% when cutting the tystor?

I have my BMV-712 setup with my Smart MPPT 100/30 to share voltage, but when monitoring the MPPT via VictronConnect, the update period of the voltage seems slow. Under the VE.Smart Networking conigurationm there is a green checkmark that blinks occasionally. Does that represent actual realtime updates received from the BMV to the MPPT? I notice the MPPT is slow to respond to sudden changes in load and/or sunlight coming in on intermittently cloudy days. What is the normal update frequency via VE.Smart Network and how can I verify it is getting that info quickly enough? Thanks.

I have an "old" BMV 600, it constantly reads about 0,20V lower than any other testing device I use to check the voltage on the same conectors. This gives me problems detecting "full charge".

Is there a way to set an offset to calibrate the voltage of the BMV600? Or is there any other way to calibrate the voltage?

Obviously, setting a lower level of full charge will get me to 100%, but I’d prefer an accurate voltage displayed if possible as I have Lithium batteries.

Thanks!