My company is building a new server room and needs a UPS, I don't know how big it should be. What criteria should I use to purchase a UPS?

Calculate the power of all the equipment in the server room, the total power of 23100W

UPS power supply power factor of 0.8, 23100/0.8 = 28875w. can use 30KVA ups power supply

Belt-carrying equipment there are servers, then you need to use the on-line ups power supply

Based on the power outages How long you need to standby time to configure the battery. If the backup time is 2 hours, then 2 sets of 100AH batteries can be used to meet the backup time of 2 hours.