I load tested, checked "settled" voltages somewhat extensively on my FLA battery in my 2102 Leaf. My best estimate is that for my conditions, the battery is kept at 40-60% SOC when not externally charged for a long period - very hard on an FLA type battery (sulfation).
Keep in mind that for a 1-2 amp "trickle" charger, to fully charge a 60% SOC, 60 ahr battery takes about 12-24 hours. My 2012 Leaf requires recharging every few weeks (the regen braking starts surging). I'm not sure how representative the Leaf Spy voltage readings are - if being used for an indication of battery SOC/condition as voltages vary so much with charging and discharging rates.
Anyone done a similar check of SOC monitering via "settled" voltages?
2012 Leaf SL
2021 Leaf SV Plus