Long term parking and battery discharge

[Tazzieman]

Speaking of age - batteries used to last for a decade. Now, three years is a decent clip. I had to decommission a beautiful Odissey after only 5 years - it will not charge beyond 12.2 V.

That's because they weren't working as hard, and certainly not 24/7 (except for the clock if you had one).
Using a smart charger that conditions the battery greatly extends battery life..
The other thing is to buy a quality battery. Many different labels , but they often are the same low price battery under the skin.

 

[carpetman]

Here you go. Pic from the trend tab.
And it's entirely possible I did the math wrong, I did it a bit quickly in the morning. I'll rerun the math again.
You can see the parked period very well in the graph. Seems to show that the car enters deep sleep fairly quickly.

View attachment 7894607

Hi Parb, I have used the following settings. I have set the current threshold to 0.00A. I can now see ~0.02A as the current after the vehicle has been shutdown. Can you share your voltage trend over the 3 weeks?
The 13.2V Charged voltage is from the Victron smartshunt manual for lead-acid.

Regards,
Carpetman

 

[carpetman]

View attachment 7894615
Hi Parb, I have used the following settings. I have set the current threshold to 0.00A. I can now see ~0.02A as the current after the vehicle has been shutdown. Can you share your voltage trend over the 3 weeks?
The 13.2V Charged voltage is from the Victron smartshunt manual for lead-acid.

Regards,
Carpetman

Actually, the 0.02A I see is a positive current (i.e. charging) so likely a measurement offset.

 

[Tazzieman]

@carpetman The Grenadier battery is AGM type. Does it matter the Peukert exponent is higher than the normal range for AGMs?
These new battery types do my head in.

 

[carpetman]

@carpetman The Grenadier battery is AGM type. Does it matter the Peukert exponent is higher than the normal range for AGMs?
These new battery types do my head in.

I believe the battery is an Enhanced Flooded Battery (EFB) and not a AGM.

 

[TheDocAUS]

I believe the battery is an Enhanced Flooded Battery (EFB) and not a AGM.

Correct it is EFB.

 

[Tazzieman]

I believe the battery is an Enhanced Flooded Battery (EFB) and not a AGM.

I haven't checked mine but early on people were saying it was a Moll 81105. Is that correct?

 

[parb]

I set my peukert coefficient to 1.25.

 

[parb]

Here is my trend over the parked 3 weeks with voltage and current as requested.

And these are my settings.