I thought it needed a new battery earlier than expected last month, but the replacement has only lasted six weeks.
Significantly the console warning can't be made to go away through the day by going in-out of set up, so it isn't the known monitoring issue.
This makes me think the solar panel is no longer working through the day, let alone charging the capacitor.
Is this something could be swapped out by me realistically?
It's about 30 months old.
I've a VP2 needing only a thermometer-humidity sensor, for now I've ordered that part - then when the VP2 is working again I'll open the Vue up for a look-see.