What's the biggest battery you can fit in a Gen.4?

If your battery is draining that quickly, something is wrong somewhere. The alarm you mention is that the factory fitted one or have you fitted and aftermarket alarm?

Have you fitted anything else electrical that could be draining the battery?

I fitted a Victron smart battery protect to ensure my accessories could not completely drain my battery.
Bluetooth enabled it cuts off my accessories (wired via separate fuse panel) when it reaches a preset voltage.

crash486 JB74W

It's an aftermarket alarm fitted by the local Suzuki dealer. I will need to debug the circuitry one by one.

The only other thing custom is KENWOOD DMX5020DABS but I doubt it's the issue.

Awesome. I will get that later on when connecting dash cam with parking mode. Now it works via cigarette socket.

Obviously your car uses too much power. On you picture I saw 0,2.. amps. This is too much by at least a factor of 10. So it should be less than 0,02A.

The usual way to determine the fault would be to remove the fuses one by one and then check in what circuit the defect is and go from there on.

Also make sure you leave the measurements on for some time (maybe 15min) before you start because usually there are consumers that take a few minutes to shut down and go to sleep.

And maybe set your battery protect to 13V or something like this. Then you make sure that your consumers are only activated if the battery is charged and the motor is running.

crash486 wrote: I fitted a Victron smart battery protect to ensure my accessories could not completely drain my battery.
Bluetooth enabled it cuts off my accessories (wired via separate fuse panel) when it reaches a preset voltage.

crash486 JB74W

Have the exact same smart controler installed.
Extremely happy, easy setup with blue tooth app.

Have a few addons and this device saved my bacon a few time. Connected into my main line I added going into the cab for various stuff.

But this currently only for my additional accessories but it works perfect