科士达UPS电源的容量用VA表示、UPS蓄电池容量用AH(安时)表示： 

科士达UPS电源功率的单位是瓦特(W)，无功功率的单位是乏(var)。一般UPS的容量都用视在功率表示，由于视在功率中既包含有功功率，也包含无功功率，既不能称作W也不能称var,既然是视在功率是伏特(V)与安培(A)，就索性称为VA。

Secco roth UPS power unit is the watt (W), reactive power unit is spent (var).General capacity of UPS are expressed with apparent power, due to the already contains the active power, apparent power also includes reactive power, can neither called W nor said var, since is the apparent power is V (V) and ampere (A), is simply referred to as the VA.

科士达蓄电池的容量单位是安培小时，简称安时(AH)，它的含义是该电池在指定放电率的条件下恒流或者恒功率放电，到指定放电时间结束瞬间放出的容量数。如放电率为10，容量为100AH的电池，用放电电流10A恒流放电10H，所放出的容量就是100AH。

The unit of capacity of a keshida battery is ampere-hour, or ampere-hour (AH), which means the amount of capacity that the battery can discharge at the specified discharge rate at the moment of constant current or constant power discharge to the specified discharge time.For a battery with a discharge rate of 10 and a capacity of 100AH, the discharge capacity is 100AH with a discharge current of 10A for 10H.