There is usually more drop in the first year of a lithium battery's life than later years, but 5% is too much if it extends out to 10% annual. Either there is another "BMS Error" in the 40kwh packs, or they are living up to the nickname "Lettuce Pack."
It's about time to check mine again, but we're in a heatwave yet again, and I don't want to charge to 100%. Maybe I'll read it at the 70% or so it's at now.
Scarlet Ember 2018 Leaf SL W/ Pro Pilot
2009 Vectrix VX-1 W/18 Leaf modules, & 3 EZIP E-bicycles.
PLEASE don't PM me with Leaf questions. Just post in the topic that seems most appropriate.