[CentOS] wich apc ups?

Hi,

I want to buy a UPS wfor a PE2800 but I'm mnot sure wich one to choose. is
1000 VA enough or do I need the 1500 VA version?

1) APC Smart-UPS 1000 VA Black SMART UPS 1000 VA BLACK 1000 VA
LINE-INTERACTIV [SUA1000I]
2)  Power Supply Apc-ups 1500va Floorstand Incl Control Cable Usb And Com
Port Output Power 980w

Other suggestions are also welcome As long as they can talk to the apcd
service of that centos 4.4 box.

euroka
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