Assuming that you are not using every item all the time;-)) the average electricity usage 60W/hr....the cost of a lightbulb. The monitor uses most and you can forget about the rest as their usage is minimal.
The reason i was asking is because i have just bought 2 350 Va Liebert UPS,s- one for work and one for home,the one at work is working great and during a short power cut yesterday saved the day and kept the PC running yet if i connect the one up at home then the overload light and beeper come on,The only main difference between the 2 systems is the USB scanner and Card reader.Should a 350 unit be big enough to run a PC and monitor ?.
A 350 will be more than enough. Assuming that you use the PC frequently and leave on all the time (shut off monitor when not in use) the average will be 60w/hr (I know but that is how leccy bills are laid out for the bewildered;-))) ) For a normal computer I cannot see more than 180w being used at any one time. There can be peaks and my figures refer to 'normal' computers and not the barking mad ones (liquid cooling-nitogen natch, graphics cards that use the entire power of a Scottish village,more RAM than Crucial carries and a light show to make the burghers of Blackpool redden) used by teh 'gamerz'.
Hi GANDALF <|:-)>. Call me Mr. Pedantic (or anything else) if you like, but: A W-h, or Wh is a watt consumed for an hour, e.g. a kWh is a watt used for a thousand hours, or a thousand watts used for an hour, otherwise commonly referred to as a unit. This is what electricity bills are generally based on.
What I think may be upsetting the UPS for Beas-Knees is the initial switch-on surge when all the computer parts are starting up. Depending on how sensitive the overload sensors are, this surge, probably only lasting a second or so, may cause the problem. Switching the monitor on a few seconds after the computer may overcome this.
The Power Supply. From Upgrading & Repairing PC's Eighth Edit. (Not all that up to date as this QUE book is now in the 14th. Edit I believe) However it does go into PC power supplies in great detail. click here
Graham - Yep - it's Mr. Muellers annual. I have the 12th Edit somewhere but cannot just lay my hands on it. Surprising as its well over a thousand pages. I also found this 'tongue in cheek' article on switched power supplies fairly amusing click here