Cruisers Forum
 


Join CruisersForum Today

Reply
  This discussion is proudly sponsored by:
Please support our sponsors and let them know you heard about their products on Cruisers Forums. Advertise Here
 
Thread Tools Search this Thread Rate Thread Display Modes
Old 12-07-2019, 01:55   #1
Senior Cruiser
 
Dave_S's Avatar

Cruisers Forum Supporter

Join Date: Jun 2016
Location: Brisbane Australia
Boat: Schionning Waterline 1480
Posts: 1,183
Strange readings on battery monitor

I have just replaced my battery monitor a month ago, it has displayed expected readings until I ran my bi-annual recondition cycle on the battery charger. All the settings were checked before starting the charger and were the same settings used last time.

Don't know why the pics are all on their side but it shows 13.38V, normal for after running the recondition cycle, it usually drifts down to 13.2 at full charge before the recycle is due. The difference is it shows I'm at 66% charge and at -224ah. Normally it is 13.3/4 at 100% charge.

The recon cycle tests the capacity and it showed a pass.

The battery charger is not connected at the time of pictures. 6 x T105 Trojan batteries parallel and in series 12Vdc.

I ran the recondition cycle then topped up with distilled water, didn't take much, same as usual 6 batteries a total of about a litre. I noticed 1 battery only had a lot of growth of "stuff" on the neg terminal. It's now cleaned back to shinny metal and coated in vasloline.

I have put it back on the charger now on a maintenance cycle hoping it will be all good in the morning, but some how I think their run might be over.

Can anyone shed some light on what's happened.

A quick check of the batteries, none are hot one has some minor swelling. I am not sure if this is new swelling or old. It is hard to notice and I could have easily missed it before.

Normal use is just solar charging, no 240Vac only twice a year to precondition batteries.
Attached Thumbnails
Click image for larger version

Name:	20190712_132429.jpg
Views:	61
Size:	373.4 KB
ID:	195797   Click image for larger version

Name:	20190712_132418.jpg
Views:	60
Size:	402.8 KB
ID:	195798  

Click image for larger version

Name:	20190712_132402.jpg
Views:	64
Size:	395.8 KB
ID:	195799   Click image for larger version

Name:	20190712_132350.jpg
Views:	66
Size:	406.4 KB
ID:	195800  

Click image for larger version

Name:	20190712_132338.jpg
Views:	65
Size:	401.2 KB
ID:	195801  
__________________

__________________
Regards
Dave
Dave_S is online now   Reply With Quote
Old 12-07-2019, 02:03   #2
Senior Cruiser
 
Dave_S's Avatar

Cruisers Forum Supporter

Join Date: Jun 2016
Location: Brisbane Australia
Boat: Schionning Waterline 1480
Posts: 1,183
Re: Strange readings on battery monitor

On a seperate guage, the solar panel's show 0Amp input, normally if the batteries are low I can usually see 10 Amps going in, if at 66% maybe 20Amps. If the batteries are at 100% I see this analog guage at 0.
__________________

__________________
Regards
Dave
Dave_S is online now   Reply With Quote
Old 12-07-2019, 03:51   #3
Registered User
 
Zanshin's Avatar

Join Date: Feb 2007
Location: Caribbean
Boat: Jeanneau 57
Posts: 1,654
Re: Strange readings on battery monitor

The Mastervolt monitor looks like a rebranded Xantrex LinkPro monitor. If that is the case, then the new monitor needs to be configured for the battery bank in question. The really important settings are:
  • F1.0 - Float Voltage
  • F1.1 - Float Current
  • F5.0 - Battery Bank Capacity
  • F5.4 - Peukert Exponent (get from Battery documentation)
  • F5.5 - Self-discharge Rate

If these aren't set, then the battery monitor will not be able to compute the correct values.
__________________
-Zanshin (SV Zanshin)
Zanshin is offline   Reply With Quote
Old 12-07-2019, 04:19   #4
Senior Cruiser
 
Dave_S's Avatar

Cruisers Forum Supporter

Join Date: Jun 2016
Location: Brisbane Australia
Boat: Schionning Waterline 1480
Posts: 1,183
Re: Strange readings on battery monitor

Thanks Zanshin

It was installed professionally and did show 13.2V as 100% charged up until the reconditioning. Did the recondition cycle up set it somehow ?

I'm not sure what those values should be.
__________________
Regards
Dave
Dave_S is online now   Reply With Quote
Old 12-07-2019, 04:49   #5
Are you serious?
 
sailorboy1's Avatar

Cruisers Forum Supporter

Join Date: Jul 2007
Location: On the boat somewhere
Boat: Hunter 410
Posts: 15,020
Re: Strange readings on battery monitor

disconnect power from it and then reconnect it
__________________
jobless, houseless, clueless, living on a boat and cruising around somewhere
sailorboy1 is offline   Reply With Quote
Old 12-07-2019, 05:58   #6
Registered User
 
Zanshin's Avatar

Join Date: Feb 2007
Location: Caribbean
Boat: Jeanneau 57
Posts: 1,654
Re: Strange readings on battery monitor

Removing power to the unit (there should be an in-line fuse on the + cable in the back) would just reset values and not solve your problem, perhaps even make it worse if only one of your parameters is incorrect.

Can you post the values for those parameters on this thread? Check the F5.0 to see if it matches the amp-hour capacity of your battery bank, that should be an indication of whether the default setting is there or if the monitor has been set.
__________________
-Zanshin (SV Zanshin)
Zanshin is offline   Reply With Quote
Old 12-07-2019, 08:14   #7
Are you serious?
 
sailorboy1's Avatar

Cruisers Forum Supporter

Join Date: Jul 2007
Location: On the boat somewhere
Boat: Hunter 410
Posts: 15,020
Re: Strange readings on battery monitor

sorry but to me resetting it is a good first step before chasing your rear in around looking for something else
__________________
jobless, houseless, clueless, living on a boat and cruising around somewhere
sailorboy1 is offline   Reply With Quote
Old 12-07-2019, 10:03   #8
Registered User
 
Cpt Pat's Avatar

Join Date: Feb 2012
Location: Half Moon Bay, CA, USA
Boat: 1963 Pearson Ariel, Hull 75
Posts: 682
Re: Strange readings on battery monitor

When the batteries were fully charged, did you reset the monitor state-of-charge display to 100%? Your posting implies you didn't. There are numerous other settings that you should verify. Read the monitor manual for instructions.

The installer shouldn't perform that reset-to-100% without first fully charging the batteries. That setting needs to be accomplished by the user (you).

If you have a quality charger, the float voltage will vary with temperature (see https://batteryuniversity.com/learn/article/charging_the_lead_acid_battery for an explanation). The voltage will also be temporarily higher immediately after a full charge. Many people call this temporary voltage boost a "surface charge." It's normal.

I don't want to be undiplomatic but your questions imply that you should spend some time studying battery theory. Here's a good place to start: https://batteryuniversity.com/
Cpt Pat is offline   Reply With Quote
Old 12-07-2019, 10:43   #9
Registered User

Join Date: Sep 2012
Location: Galicia, Spain
Boat: Fisher 34
Posts: 19
Re: Strange readings on battery monitor

Just want to follow this thread
olddog57 is offline   Reply With Quote
Old 12-07-2019, 10:44   #10
Registered User
 
Cpt Pat's Avatar

Join Date: Feb 2012
Location: Half Moon Bay, CA, USA
Boat: 1963 Pearson Ariel, Hull 75
Posts: 682
Re: Strange readings on battery monitor

One other note: Battery swelling is NOT normal. Your battery should have pressure-relief caps on the cells. These usually release gas (hydrogen) at around 5 psi. Some people just remove the caps during a reconditioning charge, and add distilled water as part of the process. The caps permit retaining some of the hydrogen gas during normal charging to reduce the amount of water you need to add (it recombines back into water). There is a limit to the rate at which these valves can release gas - charging at high currents makes this problem worse - and when overwhelmed will cause the battery to swell.

If the swelling is "minor," I wouldn't worry about it.
Cpt Pat is offline   Reply With Quote
Old 12-07-2019, 16:42   #11
Registered User

Join Date: Dec 2012
Location: Mannum, Australia
Boat: Houseboat, 60ft.
Posts: 167
Re: Strange readings on battery monitor

If it's similar to a Victron monitor just wait for a 24hr cycle & it'll reset itself.
The settings won't change by disconnecting or resetting the SOC. (State Of Charge) Just don't reset to factory settings!!
BruceS is offline   Reply With Quote
Old 12-07-2019, 17:38   #12
Registered User
 
Cpt Pat's Avatar

Join Date: Feb 2012
Location: Half Moon Bay, CA, USA
Boat: 1963 Pearson Ariel, Hull 75
Posts: 682
Re: Strange readings on battery monitor

Quote:
Originally Posted by BruceS View Post
If it's similar to a Victron monitor just wait for a 24hr cycle & it'll reset itself.
The settings won't change by disconnecting or resetting the SOC. (State Of Charge) Just don't reset to factory settings!!
As noted by another poster above, your monitor appears to be a rebranded Xantrex monitor. If so...
"... manually synchronize the battery monitor with your battery when you are sure your battery is fully charged. This can be accomplished by pressing both < and > keys simultaneously for three seconds. After these three seconds, the flashing FULL message appears on the display just like when it is automatically synchronized."


If you would like to RTFM, here's the manual: http://www.xantrex.com/documents/Acc...-01_Rev-E).pdf
Cpt Pat is offline   Reply With Quote
Old 12-07-2019, 17:55   #13
Registered User

Join Date: Dec 2012
Location: Mannum, Australia
Boat: Houseboat, 60ft.
Posts: 167
Re: Strange readings on battery monitor

You change your post Capt Pat?
So does your Victron do it or not?


My Victron BVM-702 doesn't behave that way. As noted by another poster above, your moni
BruceS is offline   Reply With Quote
Old 12-07-2019, 23:03   #14
Senior Cruiser
 
Dave_S's Avatar

Cruisers Forum Supporter

Join Date: Jun 2016
Location: Brisbane Australia
Boat: Schionning Waterline 1480
Posts: 1,183
Re: Strange readings on battery monitor

I did the "hold < > " for 3 seconds and reset to 100% which worked ok except my batteries are now down to 12.95V which is not normal.

F1.0 - Float Voltage = 13.2V
F1.1 - Float Current = 2%
F5.0 - Battery Bank Capacity = 675 Ah
F5.4 - Peukert Exponent (get from Battery documentation) = 1.25
F5.5 - Self-discharge Rate = OFF
Attached Thumbnails
Click image for larger version

Name:	20190713_121948.jpg
Views:	22
Size:	376.0 KB
ID:	195855   Click image for larger version

Name:	20190713_122316.jpg
Views:	23
Size:	402.6 KB
ID:	195856  

Click image for larger version

Name:	20190713_122304.jpg
Views:	22
Size:	405.1 KB
ID:	195857   Click image for larger version

Name:	20190713_122239.jpg
Views:	23
Size:	401.6 KB
ID:	195858  

__________________
Regards
Dave
Dave_S is online now   Reply With Quote
Old 13-07-2019, 07:53   #15
Are you serious?
 
sailorboy1's Avatar

Cruisers Forum Supporter

Join Date: Jul 2007
Location: On the boat somewhere
Boat: Hunter 410
Posts: 15,020
Re: Strange readings on battery monitor

Quote:
Originally Posted by Dave_S View Post
I did the "hold < > " for 3 seconds and reset to 100% which worked ok except my batteries are now down to 12.95V which is not normal.
What's "not normal" for that as that's more than a resting battery fully charged?

Is you charger really on?

Did you manually measure the voltage at the battery and compare to the BM reading?

I don't see any way so far from the info to know if you have a BM problem, a battery charger problem, or a battery problem, or no problem. (maybe I missed reading a key clue)

My suggestion is to turn off your battery charger a while and watch and note on the BM what the amps/voltage/SOC is for a day. There turn on the battery charger and note the same and be sure that before the BM gets to 100% that of charge that the battery is at absorption voltage and accepting less than 0.5%C
__________________

__________________
jobless, houseless, clueless, living on a boat and cruising around somewhere
sailorboy1 is offline   Reply With Quote
Reply

Tags
battery, monitor

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Battery Charging and Readings WizardOfTheWind Electrical: Batteries, Generators & Solar 51 25-01-2017 08:28
Battery Charge Readings ? sailorboy1 Electrical: Batteries, Generators & Solar 82 02-04-2013 08:52
Strange Readings from a Solar Panel ribbony Electrical: Batteries, Generators & Solar 4 03-02-2013 12:04
Link 10 Battery Monitor -Setting Battery Capacity hugh c Electrical: Batteries, Generators & Solar 3 02-05-2012 11:57
Xantrex Battery Monitor Acting Strange... CSY Man Electrical: Batteries, Generators & Solar 3 23-08-2009 15:23



Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -7. The time now is 05:18.


Google+
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2019, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2019, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.