2nd battery error message

[yossarian]

In this victron screenshot you sent we can see that your batteries accepted 300Wh of charge and spent a large time in equalisation and float modes.

This means your batteries are fully charged, behaving normally and that your solar is working well.

If you never observe a positive charge when in good sunlight then this confirms a miswired solar controller.

 

[yossarian]

So in other words, on that camping control panel do you observe a charge rate of 1A plus in good sunlight with the engine and ehu off? If not your solar controller is wired to battery ground instead of chassis ground.

 

[Vwcaliforniajapan]

Your batteries are most likely in perfect condition based on your care regime.

The Littelfuse part number (should be available in Japan) is 155.0892.5751

I would buy a 75A one as this size has worked for you for some years. Once again this is unlikely to be your current problem but the fuse is worth having on hand.

If your dealer replaces your batteries this will also reset your sensors which will make your present errors disappear until you use a lot of power and top up with "invisible" solar again.

Thanks , so you think now, its better not to change to 100A ? So if its the Fuse that is blown then its better to change to 100A if not keep the 75A ? Sorry Im not good at this ha ha !
So it might just be an error in the panel ? is there a way to reset it ? it also shows in the dashboard that 2nd battery is low .

Cheers

 

[Vwcaliforniajapan]

So in other words, on that camping control panel do you observe a charge rate of 1A plus in good sunlight with the engine and ehu off? If not your solar controller is wired to battery ground instead of chassis ground.

Thanks again !! Ill check next week !

 

[yossarian]

Thanks , so you think now, its better not to change to 100A ? So if its the Fuse that is blown then its better to change to 100A if not keep the 75A ? Sorry Im not good at this ha ha !
So it might just be an error in the panel ? is there a way to reset it ? it also shows in the dashboard that 2nd battery is low .

Cheers

You can reset the sensors by unplugging the two pin plug on each sensor. You require access to each battery. Resetting does not fix the underlying problem.

When the infotainment system says "second battery" it actually seems to mean "leisure batteries". This is due to only the coast and ocean having a third battery and both batteries being presented as a single unit on the canbus

Confusingly the camping control unit can distinguish between the under seat and rear leisure battery.