Energy density
Also known as: Gravimetric Energy Density, Volumetric Energy Density
The amount of energy a battery can store per unit of weight (Wh/kg, gravimetric) or volume (Wh/L, volumetric). LFP cells have lower energy density than NMC but offer better thermal stability and longer cycle life.
In energy storage
In stationary BESS, energy density determines container footprint and transport logistics rather than range or weight. LFP cells (90–160 Wh/kg) require more physical space per MWh than NMC (150–220 Wh/kg), but their simpler thermal management and wider DoD window can offset the footprint difference at system level.