How about the UPS power capacity?
The utility of UPS charging and common UPS battery battery standard, the configuration of the 100AH, 65AH, 38AH, 24AH. and 200AH will be divided into 2 parallel 100AH, so 2 groups of 100AH cells, each group is 20, a total of 40 100AH batteries.
For example: Santak C6KS, 6000VA (rated power) /4200W (useful power), the host DC voltage is 240V, and if extended 8 hours, the battery capacity is configured as follows:6000*8/240=200AH, according to this result, should theoretically configure 20 (240v/12v, the DC voltage of each battery is 12V) 200AH.
UPS rated power * extension time, *ups output power factor / starting voltage of the UPS host, the resultant result is the total battery capacity (AH per unit). Note: manufacturers are considering the full extension of the time, generally not multiplied by the power factor ups output.