Spec score 7.9
1100 VA, 990 Watts, Line interactive
+1100VA and 990W capacity for small desktop or rack loads
+Pure sine wave output for sensitive electronics
+Rackable design fits standard rack mounting
$345.03
as of 11/04/2026 11:08 PST - DetailsProduct details
Vertiv Liebert PSI5-1100RT120 1100VA/990W UPS Battery Backup AVR Rack/Tower | Line Interactive, Pure Sinewave, Surge$345.03as of 11/04/2026 11:08 PST - Details
View on AmazonSpec score7.9
Pros
+1100VA and 990W capacity for small desktop or rack loads
+Pure sine wave output for sensitive electronics
+Rackable design fits standard rack mounting
+Surge protection included
Compared with the 1 UPS Battery Backups on this page+Line interactive: the highest design of the 54 here
+Pure sine wave: only 26 of 54 here have one
+990 watts: 26 of the 51 here have fewer watts
−1100 va: 35 of the 53 here have a higher va
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