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Victron Energy BMV-712 Smart Battery Monitor (Grey)

4.7 out of 5 stars 762 ratings
Amazon's Choice highlights highly rated, well-priced products available to ship immediately.
Amazon's Choice in Electrical Battery Testers by Victron Energy

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BMV-712 (Grey)

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  • The Victron Energy BMV-712 is a high precision smart battery monitor; the essential function of the monitor is to calculate ampere hours consumed and the state of charge of a battery
  • Built-in Bluetooth Communication - Monitor your batteries on Apple or Android smartphones, tablets, macbooks, and other devices
  • Next to the basic display options, such as voltage, current, and ampere-hours consumed, the BMV-700 series also displays state of charge, time to go, and power consumption in watts
  • Easy to Program - A quick install menu and a detailed setup menu with scrolling texts assist the user when going through the various settings.
  • Incorrect installation can be hazardous, Please consult a licensed professional and follow all applicable electrical codes during installation
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Frequently bought together

  • Victron Energy BMV-712 Smart Battery Monitor (Grey)
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Total price: $300.07
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Customer Rating 4.7 out of 5 stars (762) 4.5 out of 5 stars (382) 4.4 out of 5 stars (387) 4.5 out of 5 stars (890) 4.3 out of 5 stars (1836) 4.5 out of 5 stars (23)
Price $206.55 $130.90 $92.73 $44.00 $16.69 $199.99
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Product description

Style:BMV-712 (Grey)

Battery "fuel-gauge", time-to-go indicator, and much more - The remaining battery capacity depends on the ampere-hours consumed, discharge current, temperature and the age of the battery. Complex software algorithms are needed to take all these variables into account. Next to the basic display options, such as voltage, current and ampere-hours consumed, the BMV-700 series also displays the state of charge, time to go, and power consumption in Watts. The BMV-712 features an additional input which can be programmed to measure the voltage (of a second battery), battery temperature or midpoint voltage.


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4.7 out of 5 stars
4.7 out of 5
762 global ratings
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Top reviews from the United States

Reviewed in the United States on September 17, 2018
Style: BMV-712 (Grey)
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1.0 out of 5 stars ***PRODUCT BUGS EXPLAINED. VERY IMPORTANT TO READ THIS REVIEW***
By Brett Stone on September 17, 2018
First and foremost, I love this device and I love the Bluetooth iPhone App; however there is a HUGE bug in this device which must be known by everyone who is considering purchasing it. Essentially, the purpose of this device is to monitor battery capacity so you are never left on the water with a dead battery and it does a spectacular job measuring load coming off your battery; however it does not measure the power which the gauge consumes on its own and it will consume every last amp left in your battery until it is completely dead and unusable. Unfortunately when it does this, the capacity will still show 99.9% or 100% of your battery remaining but in reality your battery is dead as a doornail and cannot be used. I have had 2 instances of this happening. The first was in the fall of 2017 when the boat sat on the trailer for 60 days before I winterized it and when I went to start the battery it wouldn't crank. The second instance happened on Labor Day 2018 when the boat sat for just 30 days and the battery was dead as a doornail. Both times the batteries were left in the off position with 100% charge but while the boat sat on the trailer the BMV + the Bluetooth was left on and it consumed all of the battery power leaving the boat unable to start the next time I went to use it. Attached are pictures of the most recent occurrence where the BMV shows 99.9% charge, but an actual battery charger shows 30% capacity remaining (unfortunately with Lead Acid Batteries approximately 30% of the battery is unusable so this was more or less at at 0% charge).

After the first instance, I emailed BMV support and Justin Larrabee replied back to me acknowledging my theory that the BMV does not register its own consumption and he recommended that I disconnect the shunt when not in use. The drawback to doing this is that the BMV will lose its saved settings and will need to be reconfigured and I told Justin this is not an acceptable solution and I requested a product update. I was told he would report this to the product team, but no update was ever done and I emailed him again on 9/17/18 advising that there is still an issue and the BMV is absolutely worthless with this bug and I would be leaving an Amazon review to alert all potential buyers of this bug. Justin did quickly reply back acknowledging my disappointment in this product and he would send it along to his development team again for a future update and he again told me to disconnect the BMV when the boat sits for long idle times to avoid dead batteries in the future.

One final thing I will mention is that the BMV consumes 4ma of power at idle and the Bluetooth dongle consumes 1ma of power at idle so there is always a parasitic load of 5ma of power on your battery. If you do the math that would be a .005amp per hour draw so every 8 days the BMV + Bluetooth has consumes 1 amp of power. On a standard 100amp battery, only 70amps would be usable so it is only a matter of time (depending upon the age and state of your battery) before your battery is dead leaving you stranded with a false sense of security of having 100% charge.

In conclusion, after owning this BMV unit for 2 years and seeing the bugs first hand with 2 instances of dead batteries and the BMV telling me I still had 99% charge remaining I would NOT RECOMMEND THIS PRODUCT TO ANYBODY. Purchase at your own risk, you have been forewarned.
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424 people found this helpful
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Reviewed in the United States on November 19, 2018
Style: BMV-712 (Grey)Verified Purchase
79 people found this helpful
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Reviewed in the United States on October 28, 2018
Style: BMV-712 (Grey)Verified Purchase
84 people found this helpful
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Reviewed in the United States on August 7, 2018
Style: BMV-712 (Grey)Verified Purchase
52 people found this helpful
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Top reviews from other countries

DaveW
3.0 out of 5 stars OK but not as capable as the advertising might have you believe - a great device with a poor App.
Reviewed in the United Kingdom on July 16, 2020
Style: BMV-712 (Grey)Verified Purchase
Customer image
3.0 out of 5 stars OK but not as capable as the advertising might have you believe - a great device with a poor App.
Reviewed in the United Kingdom on July 16, 2020
First impression upon opening is of a well made device. The manual contains information on all the functions but is not particularly well written and can easily cause confusion, particularly regarding calibration.

The Victron Energy Connect App needed to make the best use of the device still has bugs. For example there is an auxiliary input/output on the shunt which can be connected to a second battery or a temperature sensor. I bought the temperature sensor and then went into system settings as per the instructions and selected the sensor. The Status page of the App now shows the temperature as it should but the History page still shows the starter battery min and max voltage - even though this voltage is actually the voltage returned from the temperature sensor.

The App page labelled 'History' records a few 'Minimum, Maximum and Total figures which are useful but I have not found a way of zeroing the figures without resetting the device to factory settings which then loses all your initial set-up parameters which you have to enter again before using the unit.

The IOS App uses the screen space well, but the desktop App only uses about 15% of the screen for the graph and the other 85% just to show a single percentage figure (see screen grab). Why oh why was the space allocated to the graph not increased to a more realistic width?

For me the biggest disappointment is that this unit does not provide true historic data on the trend line. The data shown is only for the current session whilst the App is open. If you close the App or minimise it on your IOS device it stops recording data and the information is lost forever. I had hoped that it would be possible to either retrieve at least 24 hours worth of trend data when logging into the App or at least have it it to a CSV file on my desktop.

I am hoping that the weaknesses I have highlighted are because the manual is so bad and I have missed something rather than that this popular item still needs further development or has been sold with capabilities which actually rely on the customer also purchasing extra equipment. Only time will tell.
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3 people found this helpful
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Andrew M.
1.0 out of 5 stars Not a Victron item!
Reviewed in the United Kingdom on October 1, 2020
Style: BMV-712 (Grey)Verified Purchase
Customer image
1.0 out of 5 stars Not a Victron item!
Reviewed in the United Kingdom on October 1, 2020
I just had delivery of what I thought was a Victron Energy Smart Battery Monitor. As you will see from the attached photograph, this is clearly not what was supplied. The item was delivered in a Victron box with a Victron manual for a BMV 700/702 monitor as pictured in the information on the page, which is what I was expecting to be delivered. This item is being returned immediately.
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3 people found this helpful
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Miss Marilena Rega
2.0 out of 5 stars Cannot log data and Bluetooth connection not very stable.
Reviewed in the United Kingdom on July 31, 2019
Style: BMV-712 (Grey)Verified Purchase
4 people found this helpful
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Amazon Customer
5.0 out of 5 stars Very informative
Reviewed in the United Kingdom on November 4, 2019
Style: BMV-712 (Grey)Verified Purchase
One person found this helpful
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Florian Scheuß
2.0 out of 5 stars Nicht ganz brauchbar
Reviewed in Germany on November 23, 2019
Style: BMV-700 (Grey)Verified Purchase
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2.0 out of 5 stars Nicht ganz brauchbar
Reviewed in Germany on November 23, 2019
Ich habe das Problem, dass das BMV mir schon früh 100% geladen anzeigt, was aber nicht der Fall ist. Bei Vollem Akku muss man die + und - Taste gleichzeitig drücken, um dem BMV zu sagen, wann der Akku voll ist. leider Funktioniert das nicht. Ich nutze einen Akku von Pylontech, dieser hat 6 LED's die den Ladezustand anzeigen. Es leuchten 4 Led's aber der BMV sagt mir, dass der Akku wie gesagt 100% haben soll. Der BMV ist an einem Raspberry Pi 3 angeschlossen, wo die Victron Venus GX Software aufgespielt ist. Online im Victron VRM Portal, wo man alle einzelheiten im diagram sehen kann, verfälscht der fehlerhafte Ladezustand dies natürlich. Ich habe bis jetzt keine Lösung für das Problem gefunden.
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