I have previously posted my concerns about my Club Joker starter battery voltage speedy decline which caused some interest as well as derision.
Here I post an update but to recap, the pattern since new, last year, has been a precipitous drop in voltage after charging as in the monitor record below which shows a drop to 12.51v only a day after removing the charger and to less than 12v six days thereafter.
VW says there is nothing wrong.
I find it hard to believe that it is normal to have to charge the battery every couple of days – it’s a camper, not a daily use van.
I disconnected the battery after a charge on 7/8/24 and the voltage drop over the next 18hrs was 0.05v, suggesting to me that the battery was likely OK.
The van went on a short trip and hence the voltage spikes on 8/8/24 but thereafter the voltage decline has been considerably less, taking 4 days to drop to 12.51v cf the one day previously.
The only thing I did was to disconnect and reconnect the battery.
There are no electrical items left on other than that which VW/Westfalia fitted and the alarm.
At this level of voltage decline I can live with the van although I’ve no idea if this is within the acceptable normal drop for this van’s housekeeping and inevitable battery voltage decline.
I did wonder there might have been a poor earth connection to the battery post which I corrected on reconnection, but if that had been the case, one might have expected to see voltage spikes whilst the van was in use?
I would be interested to hear any comments.
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