Resting 22 Average Battery Voltage is too high above set point

[SnoTrax]

Hi Guys, I'm new, very new to this, sorry and thank you in advance.
I have 143 volts coming in from solar, battery reads 48V
Code is ReasonForResting = 22   Average Battery Voltage is too high above set point

Anything I can do to troubleshoot this?
Thanks,
SnoTrax

[Vic]

Hi SnoTrax,   welcome to the Forum.

Could you tell us a bit more about your system?

What model number of Classic are you using?
What is the system voltage (24 V,  48 V,  etc)?
Have you tried,  multiple times to see the RFR number?
Has this system performed as expected,  before this Resting situation?
Have you  checked the Charge Voltage settings in the Charge menu?

Thanks,    Vic

[SnoTrax]

Hi Vic, Thank you!

Classic 200, MagnaSine Inverter, 8 ReneS Ia Panels, 48v Crown 12CRV110 AGM Batteries, Kohler 38CRL Generator

Now the RFR is 5 Too low power and Vbatt below set point for 90 seconds
There is nothing plugged into the Aux ports.

Getting 138 volts from the panels.  The generator does charge the batteries but the solar does not.  The previous cabin owner thought the batteries were dead and he bought the new Crown batteries after we closed.  But I don't think the Midnite/solar was ever charging the batteries.

Thanks for any help!

[SnoTrax]

I did try a factory reset the other week and have not checked the Charge settings so they would be set to factory defaults
Is it normal for Aux 2 to show the KID?  Screenshot attached.

[ClassicCrazy]

I did try a factory reset the other week and have not checked the Charge settings so they would be set to factory defaults
Is it normal for Aux 2 to show the KID?  Screenshot attached.

Aux 2 is showing the Whizbang setting which is add on monitoring device for Classic that mounts on a shunt. I believe it is the default setting. You will have to look at your system wiring and see if there is shunt and Whizbang on it. It would be the first thing that the negative from the battery connects to ( if it is there ) and there would be other negative wire on other side of shunt.

Okay sounds like you don't have a Whizbang I just reread you post and you said no wires connected to AUX jacks. Well it doesn't matter that the AUX is set to Whizbang - it won't effect anything on your system if not in use.

The first thing  you mentioned is usually if the generator has been running and charged the batteries and they are at a voltage above the Absorb Setting of the Classic.

What you need to tell us is the Classic Absorb Setpoint, the Absorb time, the Float setpoint - and also what the battery voltage is at the time that you see those reasons for resting.   Or take some screen shots of Local Status app status screens when  you see those reasons for resting.
Also would be good to know what the Absorb and Float setpoints in the magnum inverter charger are set for.

Larry

[boB]

You say your battery voltage is 48 volts when this happened ?

Is that 48.0 volts showing on the status display ?

What is the Absorb and Float voltage set to  ?   

Also, go to the Temp-Comp menu and press the upper-right soft key which should be labelled VIEW.

That will show you that battery temperature compensated set point voltage which can be slightly different than the actual Absorb or Float set point due to high or low battery temperature.

boB

[SnoTrax]

Thank you guy, you're awesome and you're help is greatly appreciated.  Screenshots attached.

It happens at any voltage level. I just ran the generator until the Classic read absorb and when the Gen stopped the Classic went back to 'Bulk' and 'Reserting' every 90 seconds.

My firmware is at 2126; Network 2122.  Can I jump to the latest firmware version or do I need to phase in the releases?

Thank you again! - SnoTrax

[boB]

OK, so I see a possibility or two here...   A couple of questions first...

When your generator is OFF and the Classic goes from Bulk to Resting every 90 seconds, how much power or current is the Classic putting out
Oh, and at that time, what is the INPUT PV voltage doing ?  Does the input voltage change from Voc open circuit voltage when it goes back to bulk ?  I think the important question there is, what does the Classic try to bring the PV input voltage down to for its maximum power point ?

If it does NOT come down at all or very little when it turns on and goes to bulk or MPPT, that would be the issue and we'll figure out why.


When the generator is off and the battery voltage is down below absorb or float voltage, is the sun shining good and you see some power output ?


When the generator is ON and the Classic is Resting, what is the battery voltage the Classic is reading ?

boB

[SnoTrax]

Hi boB, Honesty I'm not seeing anything change on the classic dash when cycling between 'Resting' and 'Bulk'.  I feel like the classic isn't putting any power out and the cabin is taking power from the battery bank as the battery volts continue to go down until I run the Gen to charge again.  I was gone for two weeks and the battery volts went low enough to kill the power to the classic.
Attached is a screenshot from very sunny day, Gen is off.

When the Gen is on, it appears to mirror what the Magnum Controller is reading/doing.  For example when that says 'absorb' so does the classic.

[boB]

Ahhhhh....   There we go !  Thanks !

Did the PV input voltage change from 143 volts when Resting to 136V in Bulk-MPPT ?   The PV input voltage should really be running down to maybe 112V or below 120V at least to get useful power output.


Which charge "MODE"  is the Classic in ?   

If it is in "SOLAR" mode, try changing it to Legacy mode and let's see if the input voltage drops more and gives you some power output again.

[Vic]

SnoTrax,

One curious setting,   is,   that Float appears to be set to 45.7-ish volts.   If the Classic wanted to go to Float,   the battery V would be higher than that setting.   This probably has nothing to do with the issue  ...

Thanks for the Local Ap pics   â€¦   still pondering.   Vic

[boB]

SnoTrax,

One curious setting,   is,   that Float appears to be set to 45.7-ish volts.   If the Classic wanted to go to Float,   the battery V would be higher than that setting.   This probably has nothing to do with the issue  ...

Thanks for the Local Ap pics   â€¦   still pondering.   Vic

Thank you Vic for noticing that !

Didn't notice the float setting but, yes, that would certainly be an issue if in Float.

I just saw the Absorb up around 57V and said to myself, OK, settings are good !

But if it was in Float, the Classic would not bother coming out of Resting I don't think UNLESS is is using VERY old software and I mean REALLY old.  Almost prototype like from 2011.

[ClassicCrazy]

You asked if you could update firmware without doing all the ones in between - yes .
I would update to latest firmware, do VMM reset, redo all  your setpoints to recommendations from battery manufacturer .
That will take care of the wrong Float that may be causing issue.

Larry

[boB]

SnoTrax,

One curious setting,   is,   that Float appears to be set to 45.7-ish volts.   If the Classic wanted to go to Float,   the battery V would be higher than that setting.   This probably has nothing to do with the issue  ...

Thanks for the Local Ap pics   â€¦   still pondering.   Vic

Actually, he said that the Classic was going between Bulk and Resting after 90 seconds so that means it is not in Float.

The issue appears to be that the PV input voltage is NOT dropping down to bring the battery voltage UP.

So, the output power stays near zero watts and amps and it goes to Resting after 90 seconds.

There may be a bad PV connection.  OR it may be that, for whatever reason, the tracking is not correct in SOLAR mode which I hope we find out at his next posting.

OR, it could be a bad Classic.  But first, we should see if he can get the input voltage to drop to around 80% of Voc.

[Vic]

My firmware is at 2126; Network 2122.  Can I jump to the latest firmware version or do I need to phase in the releases?
Thank you again! - SnoTrax

Firmware 2126 for the Classic,   and the matching FW for the MNGP (the display panel),   have been very serviceable,    on the Classics here.

It IS true that,   generally,   later FW is often better. 2126 is about 2.5 - 3 years old,   and IIRC,   had support for the WbJr,   and Follow Me.

BTW,   SnoTrac,   if your using Lead Acid batteries,  a good (48 V battery) Float voltage is around 54 V,   or so for  modern batteries,   and  52.4-ish V for older generation batteries,   like those,  here.

Assume that the Float setting in the earlier screen shots,   was a Typo?

FWIW,  Vic