The installation supervision and commissioning processes ensure the correct installation and functionality of UPSs and their batteries.

Fans inevitably experience mechanical wear, and therefore need replacing every five years. Faulty fans can expose internal parts to extra heat, which can cause early equipment failure. Electrolytic-type capacitors, used in AC and DC filters, these need to be replaced every nine years. A capacitor failure threatens system availability and exposes the load to an unstable utility source.