Industry jargon

State of health

Also called: SoH, SOH State of health is an estimate of a battery's condition relative to a defined reference state, usually when the battery was new. It can reflect changes in usable capacity, power capability or other performance measures, depending on the manufacturer's method. SoH is not the same as state of charge. A battery can be at 100% SoC while having less usable energy than it had when new because its state of health has declined. There is no single universal calculation used by every vehicle or battery manufacturer. SoH values should therefore be interpreted alongside the method used to derive them.