Battery drainage while parked for a while… any solution?

[Mohs 9]

Just came back to my Grenadier after 20 days. SoC drops from somewhere in the 70ties to 62%. Starts w/o problems. Hey, it is winter here with temperatures well south of 0, so I am quite happy.
My setup: Single battery, utility vehicle w/o alarm.

 

[Rok_Dr]

Today was the worst state of charge result I have had so far.
Car has been sitting for 2 days and left the PWR switch on.
Fridge, 2 x inductive iphone charging mounts and dash cam on.
No phones in the chargers but they still use a fair bit of power.


As usual I turned the key and she started first go.
Glad I chose the factory auxiliary battery option.
Battery warning came up followed by bings and bongs.

State of charge 0% !!!!


View attachment 7887163

yes I occasionally see a 0%SOC on start-up but it always self corrects after a bit.

 

[landmannnn]

Just came back to my Grenadier after 20 days. SoC drops from somewhere in the 70ties to 62%. Starts w/o problems. Hey, it is winter here with temperatures well south of 0, so I am quite happy.
My setup: Single battery, utility vehicle w/o alarm.

Very similar for me. Away in the sun for 19 days, the SOC went from mid 80%s to 66%, single battery.

 

[anand]

I'm away from my Grenadier for the month, and through the Victron Smartshunt/Cerbo I can remote monitor the starting battery voltage.

Starting on January 31 the voltage was 12.79 volts, currently it is down to 12.65 volts... This is single OEM battery. I'll post up at the end of the month what it drops to

23 days of sitting, starter battery voltage is now down to 12.61 volts... Another 8 days to go until it will be started, so we'll see how if it drops further or not

 

[Eric]

23 days of sitting, starter battery voltage is now down to 12.61 volts... Another 8 days to go until it will be started, so we'll see how if it drops further or not

Wasn't it possible to leave it on a smart charger while you are away?

 

[anand]

Wasn't it possible to leave it on a smart charger while you are away?

The aux battery is on a charger (Wi-Fi hotspot and some other added electronics are still running), but I don't have a charger hooked to the OEM battery

 

[ADVAW8S]

Wasn't it possible to leave it on a smart charger while you are away?

Keep in mind, he did not spec his Grenadier with a dual battery. He then put in a second battery and then hooked up a victron system to control the aux battery. A more traditional set up versus the Ineos version.

 

[bigleonski]

16 days undriven saw mine down to 86% yesterday.
Touch wood I have a good one.

 

[anand]

For what it's worth, my final was 32 days without driving, final battery voltage was 12.59v; SoC was down to 76%.

It faired far better than my girlfriend's '23 Forester which barely had enough juice to start (and not enough for the app-based remote start to work due to battery voltage)

 

[DaveB]

16 days undriven saw mine down to 86% yesterday.
Touch wood I have a good one.

Mine got down to 0% charged a couple of weeks ago.
I have the factory dual battery so it started no problem.

 

[Kruegerruda]

I had the dual-battery package. The starter battery didn't last long, only about 6 months. The car was probably parked somewhere for too long before it was delivered. The second battery, then installed as the starter battery, lasted longer, but was also quickly down to 40% after a few days of camping. And despite a long journey, it was slow to fully charge. Now with a 150Ah lithium battery with built-in battery management with Bluetooth and mobile phone app, everything works. As a ‘second battery’ I have an Anker power bank with 100Ah and a built-in 220 V inverter, compact part. It powers the cool box and espresso machine.

With both original batteries I had the undervoltage error with many error messages. Unfortunately, there is still no ODB device to clear the error codes myself. So I had to go to the dealer every time.

And: Despite the error display, the Grenni ran without any problems.