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Calculating necessary VA/watts for a UPS?

Discussion in 'Hardware' started by chithanh119, Oct 15, 2008.

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  1. chithanh119

    chithanh119 Thread Starter

    Oct 15, 2008
    Hey. I've had my current UPS for at least five years now, and the "replace battery" alarm just went off. It's an old Conext 900 VA UPS, but I'm in the market for a new one now, I guess.

    I currently have the following plugged into the battery plugs:

    - Tower (520 watt PSU, this one)
    - 19" LCD Viewsonic (~50 watts, I think)

    Based on that, I'd estimate I need a max 600 watt UPS. However, I'm not entirely sure on the VA rating. Is 900 VA enough? Do I need more, or could I get away with less?

    I guess I'm just not sure how to calculate that sort of thing. It's probably a pipe dream, but I was hoping to spend less than $100 on this.

    So can anyone help?
  2. ShadowProwler420


    Jun 20, 2007
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