18kWh is the nominal capacity. Pretty much every vendor advertises the theoretical maximum capacity but not all of them are honest to also give you the nominal

18kWh is the nominal capacity. Pretty much every vendor advertises the theoretical maximum capacity but not all of them are honest to also give you the nominal capacity. Just like some people recently found out that the Model S 85 actually only had 81kWh capacity with 77kWh usable [1]. Similarly my electric motorcycle advertises 13kWh capacity but clearly says it has only 11.4kWh nominal capacity [2]. [1] https://electrek.co/2017/01/24/tesla-teardown-100-kwh-battery-pack/ https://electrek.co/2017/01/24/tesla-teardown-100-kwh-batter... [2] http://www.zeromotorcycles.com/zero-s/specs.php?model=sr http://www.zeromotorcycles.com/zero-s/specs.php?model=sr