Battery shunt removal.

[S-M]

Any downsides to removing the negative shunt so the starter battery is getting a good charge every time?

I replaced my starter battery with a new Bosch one a few weeks ago thinking the old one was knackered (Tayna replacement) but its still sitting at around 11.8/11.9 when i goto start it after parking for a week (ive tweeked the battery coding)
The van gives it 14v+ when coasting as normal.

 

[rod_vw]

@S-M as far as I am aware the battery monitor is there to ensure a 20% (ish) overhead in the battery to improve efficiency thus emissions, it also provides for some regenerative braking hence you see the voltage go up to 14v plus on the over-run and some times braking.
I can't see any good reason to remove the shunt though.

The most likely reason for your battery to seem down on volts after being parked is the same as we all have, the small but noticeable current drawn by the various modules that 'wake up' every time you open a door etc.
Many of us with leisure batteries have fitted one of the devices to keep the starter battery topped up from the leisure to solve this very problem, an Ablemail AMT12-12-5 for instance.

 

[S-M]

i use a dcds20 solar b2b setup that apparently has a starter battery maintence/trickle function although trying to find out exactly what/how it works is not going well.

I have seen functions in VCDS for "Energy management" or similar, are these related?

 

[rod_vw]

The VCDS Energy management functions have nothing to do with any leisure or auxiliary battery charging device.

I don't have any knowledge of the DCDS20 Solar B2B that you have but by what I see on-line it is almost plug & play. I found a manual at POWERTECH DCDC-20A DC to DC Dual Battery Charger User Manual if you don't have it already.

 

[Raul a/3]

i use a dcds20 solar b2b setup that apparently has a starter battery maintence/trickle function although trying to find out exactly what/how it works is not going well.

I have seen functions in VCDS for "Energy management" or similar, are these related?

Can you post a link to that model?