I think I probably have the worst 2015 SL battery degradation of any so far reporting. Here are my 100% charge stats:
Battery Mfg Date: 6/6/2014
Purchase Date: 9/5/2014
GIDs: 206 (73.3%)
Battery Temp: 81.8, 83.5 & 83.1
I am anticipating dropping the 10th bar shortly.
With approximately 0.5AHr loss per month, it appears I am on track to loss the 9th bar before 60,000 miles.
Will report here when I lose the 10th bar.
Mike McNamara, P.E.
2015 Grey Leaf SL Premium Packages; 2017 Chevy Bolt Premium; 2012 BMW R1200GS Adventure
Planned 19.6kW PV System
"Where is The Lithium Valley?"