HP Tower Uninterruptible Power System - Manual (Page 68)

Warranty information 68
Recommended duration of use
Although tests and a multitude of customer experiences have shown no noticeable performance issues with
UPSs for significant time periods after expiration of the 3-year limited warranty, we strongly recommend
considering replacing UPSs after a maximum of 5 to 6 years of use to assure full functionality and a safe
operating environment. This recommendation does not extend or in any way alter the warranty for UPSs
which is limited to a time period of 3 years and a coverage as stated in the applicable warranty statement.