UPS power used daily n Office saves Electricity?

UPS power used daily n Office saves Electricity?

I head someone tell us that we need to switch off the main Raw power daily in our office so the UPS delivers the electricity for 2 hrs and this saves the overall Electric bill... Is it true? by any theoretical way?
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dbruntonQuid, Me Anxius Sum?  Illegitimi non carborundum.Commented:
>>  Is it true? by any theoretical way?


Your base UPS uses a battery for emergency power.  This power comes from the main system and there is a power loss in converting storing it in the battery (recitification, filtering etc).  Now when the battery comes into use supplying power, it is supplying it less efficiently than the mains system would; first through the mains supply being converted into battery storage as mentioned in the prior paragraph and secondly by having to convert the battery storage (DC) back into AC (conversion losses).

Or to summarise, the UPS is providing power less efficiently than the main supply would.
If your electricity rate varies on time of day and the differential is sufficiently large, you might conceivably save on your electric bill by running from battery when rates are at their peak. You use more electric power overall, though, and the calculation of savings would have to include the occasional battery replacement cost.
Dave BaldwinFixer of ProblemsCommented:
And when you turn the main power back on, there will be an increase in current until the battery is fully charged.
JohnBusiness Consultant (Owner)Commented:
It does not save power at all. There is a power loss in charging the battery and the efficiency of the circuit providing power as dbrunton notes. In a true UPS the battery is always the source of power to the computer and AC is always charging the battery. This prevents any brief switchover to battery power.

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