Power over Time (PoT) is a statistic that increases the rate at which a player character regenerates power. All characters have an innate Power over Time rate, which increases (or "ticks") power every six seconds. Each point of PoT thus increases the power regenerated every six seconds by one point.
PoT is typically found to be more useful at lower levels, when a character's power level is relatively small.
PoT may be increased via the class masteries: