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Old 10-03-2016, 04:28 AM   #71
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Originally Posted by Rocinante View Post
Yikes! I'd check the connectors between your batteries for resistance to see whether something is awry.
Rocinante:

I had a breakthrough!

There was positive and a negative wire attached to the right side battery relay breaker. We removed the black wire and just kept the red connected to the relay breaker because the opposite side of the relay breaker had a red wire going to the right side battery. The right side was not getting an equal charge from the converter. Now, for the first time in 4 years, both batteries are getting an equal charge! See attachment Victron Battery Monitor Screenshot.

We now have a black wire that we need to determine its proper location.

The Tech will be over on Tuesday to determine where it should go. I will monitor the batteries after I unhook the shore power today and start the refrigerator and turn on some lights to see how the batteries and the Victron Monitor perform.

Thanks for your support and interest in this 4 year issue.
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Old 10-03-2016, 04:56 AM   #72
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I am puzzled by your response....I have a schematic of that circuit for my trailer. The relay is basically a switch between the battery bus and the DC distribution panel. The batteries are paralleled in the battery box, not at the bus.
My schematic does show a black wire to the battery bus for the 7-way tow vehicle charging wire. Electrically, that is the same is the battery input side of the relay. It might be the case that your trailer has the tow vehicle charging wire connected at the relay instead of the bus bar.
Larry
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Old 10-03-2016, 10:21 AM   #73
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That can be right. I had a new 7-way tow vehicle wire installed by Camping World a year ago and they probably made the incorrect connection. That also gives me a clue as to where the black wire goes! It may have been erroneously attached to the wrong connection. I will pass this on to the Tech on Tuesday.

Thanks for the insight.
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Old 10-03-2016, 11:13 AM   #74
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Best of luck, glad you found whatever seems to have been causing the issue. What you describe sounds like it should have caused a dead short, will be quite interesting to see what the tech says when they take a look. I'm no expert, FYI - just thinking out loud, and could easily be mistaken or confused.
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Old 10-03-2016, 11:16 AM   #75
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I have a new Screen Shot after letting fridge and light run for about 16 hours. It appears that the batteries are functioning rather well. At -1.40A, the batteries would have 3 Days & 8 hours left. Seems realistic. Definitely many time better than my usual 1 day max!
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Old 10-03-2016, 11:21 AM   #76
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Sounds awesome, congrats on finding and debugging the issue. Now we're gonna have to go get one of those Victron monitors to figure out where the power's going in our own system.
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Old 11-12-2016, 05:46 PM   #77
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Now that I have the battery monitor I am not sure what to believe. It reads after I night of light use 12.16V but 87.9%.

As far as what I have found this should be about 50%.

Am I missing something. Dave
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Old 11-12-2016, 06:08 PM   #78
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Now that I have the battery monitor I am not sure what to believe. It reads after I night of light use 12.16V but 87.9%.

As far as what I have found this should be about 50%.

Am I missing something. Dave
We're there any loads on the system when you read it in the morning?
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Old 11-12-2016, 07:30 PM   #79
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Now that I have the battery monitor I am not sure what to believe. It reads after I night of light use 12.16V but 87.9%.

As far as what I have found this should be about 50%.

Am I missing something. Dave
Are you certain that you programmed the BMV-702 with the proper amount of amp/hours that match your battery bank? The default setting is probably not a match to your actual capacity.
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Old 11-12-2016, 09:25 PM   #80
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The only load I had was the refrigerator. My batteries are about 4 months old. I believe I programmed them at 140 amp.

They are interstate 24 OEM batteries that were replaced by the dealer about 4 months ago.

Thanks all
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Old 01-22-2017, 12:05 PM   #81
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Trouble with BMV-702

After leaving my trailer plugged in for the past month I went out to see the state of charge using the MBV-702 and discovered a blank display.

I checked the connecting cable and re inserted the cable from the shunt and the monitor.

I don't know if the monitor or the shunt is bad? Any idea where to check next. I would like to do all my homework before I contact the seller.

Again it has been working but just went dead.

Thanks, Dave
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Old 01-23-2017, 09:39 AM   #82
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Dave, power would be my first guess. I'd do the following:

1) Remove and insert the wire ferrel that goes from the positive side of the battery into the shunt, sometimes they don't seat right.
2) Check your batteries aren't dead using a volt meter, also check the voltage using one probe on positive side of battery and negative probe one each end of shunt.
3) Check the continuity between the positive wire from your battery to the shunt.
4) Grab an off the shelf phone cable (make sure all 6 conductors are wired up) and try that.

There's a also a trouble shooting section in the manual - https://www.victronenergy.com/upload...S-SE-PT-IT.pdf
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Old 01-23-2017, 10:02 AM   #83
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Thank you mgieselman. My trailer had been hooked to shore power for some time. I disconnected from the house and let it sit and it now works again.

Apparently it does not like to have constant current from the charger although I have the PD 4655 smart charger.

Hopes this helps other than may encounter problems.

Dave
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