Dual Batteries and Fridge

Logsplitter said:

I woke up to this yesterday. A bit of a shock as power has never been below 80% before according to the onboard monitor. Vehicle parked up for 18hrs. Fridge running and lots of kit charging. DecidedView attachment 7839756 to try and start and started easily and reading changed quickly to 81% charge. A computer glitch I suppose .
Grenadier petrol with dual battery system.

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AZGrenadier said:

Thought I would see what the fridge would do if left on for a couple of days. I have a 37l ARB that I plugged in and stuck some room temp waters and soda in. Left the truck parked outside in Tucson, AZ. Donny Gray, no shade, no additional insulation for the fridge, just sitting in the sun. Now it wasn’t hot, mid 60s high, I would assume it would be different in the summer at 110. 48hrs and the batteries dropped from 96% to 64%. I think that is pretty encouraging.

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bigleonski said:

Call me old achool, but I’d rather the starter stay at 90% plus and guarantee a car start, and have the secondary down to min safe level before shutting down the fridge if not recharged.

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AZGrenadier said:

Thought I would see what the fridge would do if left on for a couple of days. I have a 37l ARB that I plugged in and stuck some room temp waters and soda in. Left the truck parked outside in Tucson, AZ. Donny Gray, no shade, no additional insulation for the fridge, just sitting in the sun. Now it wasn’t hot, mid 60s high, I would assume it would be different in the summer at 110. 48hrs and the batteries dropped from 96% to 64%. I think that is pretty encouraging.

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Logsplitter said:

I woke up to this yesterday. A bit of a shock as power has never been below 80% before according to the onboard monitor. Vehicle parked up for 18hrs. Fridge running and lots of kit charging. DecidedView attachment 7839756 to try and start and started easily and reading changed quickly to 81% charge. A computer glitch I suppose .
Grenadier petrol with dual battery system.

Click to expand...

AZGrenadier said:

Thought I would see what the fridge would do if left on for a couple of days. I have a 37l ARB that I plugged in and stuck some room temp waters and soda in. Left the truck parked outside in Tucson, AZ. Donny Gray, no shade, no additional insulation for the fridge, just sitting in the sun. Now it wasn’t hot, mid 60s high, I would assume it would be different in the summer at 110. 48hrs and the batteries dropped from 96% to 64%. I think that is pretty encouraging.

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Tazzieman said:

Just get the Noco jumpstarter and backup your backups!
It fits nicely next to the aux battery togerher with a multimeter.

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Trialmaster said:

I had the same after a DPF regen. Showed 0%, started and went straight to 76%. My vehicle is in for 6 recall items tomorrow. Will ask about this.

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Logsplitter said:

All seems good now since I’ve done a maintenance charge with the smart charger. Prior to that it had been sat around for a while over the festive holidays so maybe battery a bit depleted.

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AngusMacG said:

The batteries are my concern. I have the Aux battery option and with the vehicle still sitting at the dealer waiting for their license I am concerned about both. The dealer is claiming to be utilizing battery tenders but not sure if that includes the aux battery or not.

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anand said:

If the battery tender is on the primary battery, and voltage gets high enough the Smartpass should "think" the alternator is charging and thus connect both batteries together, thus charging both

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Trialmaster said:

I had the same after a DPF regen. Showed 0%, started and went straight to 76%. My vehicle is in for 6 recall items tomorrow. Will ask about this.

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FlyingTexan said:

The guy below says he has a really good Grenadier without any of the problems you do. He says you’re probably just doing things wrong and should read the manual.






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Disco Dave said:

He has a diesel, that’s where he went wrong.

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AZGrenadier said:

Thought I would see what the fridge would do if left on for a couple of days. I have a 37l ARB that I plugged in and stuck some room temp waters and soda in. Left the truck parked outside in Tucson, AZ. Donny Gray, no shade, no additional insulation for the fridge, just sitting in the sun. Now it wasn’t hot, mid 60s high, I would assume it would be different in the summer at 110. 48hrs and the batteries dropped from 96% to 64%. I think that is pretty encouraging.

Click to expand...