I was looking at the datasheets of some UPSs and I noticed some oddities:

 
https://www.durantesrl.it/assets/files/serie-compact.pdf

For example, the COMPACT 1000 model claims to have a capacity of 600W, but contains only 2 12Volt batteries with 7Ah ..

The doubt arose when I tried to calculate the wattage of the battery pack:

> 2x12x7 = 168 Watt

Did I do something wrong, or is the declared capacity not true?