Old UPS, but just put there a new big 9 Ah battery (bought on Dec. 30). 825VA is approximately 570W of power.
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The UPS is really great: it has LCD screen with indication of input, output, load (in W), battery capacity and time to run off battery. You can use it just to check consumption. Relatively small for its VA.
8 outlets, of which 6 are battery protected and 2 - surge only (for printer or high load).
Works perfectly, but can't run together my old but power-hungry desktop with running 3D printer (not enough power).