UPS Backup Power for Surveillance Guide

Author: Brian Rhodes, Published on Jan 27, 2016

Backup power for surveillance systems generally rely on batteries, especially since UPSes for computers are common and easily available.

However, uncertainty in picking the right backup power supply sized with the right batteries is a common problem, and the pitfalls of poor selection stretch beyond just having a weak system.  In the note, we look at battery backup, the most common method for surveillance power backup.

Inside we examine:

  • UPSes run time delivered
  • Understanding UPS power units of measure
  • How to calculate surveillance system wattage
  • Using runtime graphs to determine supply duration
  • How much backup runtime is needed
  • Common factors affecting runtime
  • Why consumer UPSes often are too weak
  • Why battery equipped power supplies may not be enough
  • Why commercial UPSes are often the best choice
  • Using generators for longer runtimes

****** ***** *** ************ ******* ********* **** ** *********, ********** since ***** *** ********* *** ****** *** ****** *********.

*******, *********** ** ******* *** ***** ****** ***** ****** ***** with *** ***** ********* ** * ****** *******, *** *** pitfalls ** **** ********* ******* ****** **** ****** * **** system.  ** *** ****, ** **** ** ******* ******, *** most ****** ****** *** ************ ***** ******.

****** ** *******:

  • ***** *** **** *********
  • ************* *** ***** ***** ** *******
  • *** ** ********* ************ ****** *******
  • ***** ******* ****** ** ********* ****** ********
  • *** **** ****** ******* ** ******
  • ****** ******* ********* *******
  • *** ******** ***** ***** *** *** ****
  • *** ******* ******** ***** ******** *** *** ** ******
  • *** ********** ***** *** ***** *** **** ******
  • ***** ********** *** ****** ********

[***************]

UPS = ******* **** **** * *****

** * ******* **** ** *****, ****** *** *** ***** to ****** **** ****** ** *********, ********* ******* ** **** for **** * ***** ************ ****** (*** ****) ** *** feasible **** *****, ***** *** ****** ****** ******** *** *** * *** hours ** ****. ******* ******** **** **** * *** ***** to **** ** *******. *** ********* ** ******* ***** *** ******** to bridge **** ** *** **** ******, *** ** ******* **** for **** ** ***.

Generators *** ****** ****

*** ****** ***** ******* **** **** ** **** ** ***, generators ****** ** ****. *** **** ** **********, *** ********* ****** ***** *** ************.

UPS ***** ***** ** *******

*********** ***** *** ** ********* ****** ***** ***** *** *******. For *****, ***** ***** ***** *** **** ** ********* *** relative **** *** ******* ** * ***.

*****:*** * ******* **** ** *** **** ***** * ******* needs, ***** *** ****.  **** ***** **** ********** ******* **** the ******, ** ********* ******* **** *** ** ** *** or *** *** *** ** **** **** ** **********.  ***** does *** ***** ** **** ** ****** **** ****, *** demand ** * ******. ***** ***** ******* ****** ***** ** Watts, *** **** ******* ***** *** ****** ** ****** ******** using ** **** **** **************** **********. ******** ******** ******* ******* **** ****,*****-**** *** * ****, ************* **** ****.  ******* ***** *** ** *** **** ****** ******* *** selection ********, *** ******* ****** ** *** ***** *** ******* power ***** ** ******* ************ *** *** ** ****** ** the **** *****.

****/**** (**):**** ***** ******* ***** ******** **** **** ****, ***** ** an *********** ***** ****. *******, *** **** ** ********* ******* to ********** ** ******* **** (** **** *** ***** ********** to ** ******** *****) ***** **** *** ******* ******* **** servers, ********, ** **** *** **.  ***** *** **** **** often ** ******** *** ******** ****** ** ***** ******** *********, which *** **, *** *** **** ****** ** ***** **** claim ** ********* *** ********* *** ** ******. *** ****** wattage ********* *** ****** ***** *** **** ** **** **** the *********** ** ****** ** *** ****. **** ***** *** VA ** *** ********* ******** *********, **** ******* *** ****** **** ******** *** *, **** *****-**** **** ****** **** ******** *** *, *** **** ********** **** ** **** **** ******** *** *.

****/***** (**):  *** * ******* ** ***** **** ****, ***** ***** like ****/***** *** ******. ****** *******, * **** **** ******** 1 **** **** ** *******. ***** ** *** ******* **** value ** * **** ***** ****** ******* ***** ********** *** almost ****** **** **** ** **** *** ******* *** ***** dynamic. *******, **** ******* ******* ****** ** ********** **** ********* *** **** * ***** ****** ******** ***** at * ***** **** ****.

** ********* *** **** **** * *** *** ****** ****** power, ***** ****** ***** ****** **** ** ********** *****:

System *** ***********

*** ***** ****** ******* ******** *** ***** ****** ** *** system **********, ********* *******, ********, *** ********* ** *******. *** *********** ** ***** ******* ******* **** *******:

(****** ** ******* * ***** ******** ** ******) + (***** used ** *********) + (****** *****)

** *** ** ******* ***** ****** ***** * *******, ** NVR *********, *** ** * **** ******:

(* ******* * * *) + (*** ***) + (*.** ******) = ~*** * *****

System ******* **. *** *******

****** ****** ***** *** ***** *** **** ********** ********* **** *** same ****, ***** (*.*., ** *** ***** **** *** ** 70 *****, ***. *** * *** ***** ** ***** *** 300 ***** ** *** *****, ***.), ***** ****** ** ****** related. *** *******, * ** **** *** ********* ** * 300 **** *** **** *** *** ******** ***** ** ** hours, **** ** *** (*******) ******* *** ******* *** ** divided ** ****** *******.

** ********, ******* / ****** **** ** ********* ***** *****. For *******,**** **** ******* **** *** * **** **** ***~* ********** * **** *** ***~** *******.

*** **** ***** *** *** ******* ***** / ***** ** determine *** **** ** ****** *** *** **** *******.

Runtime ****** / *****

******* ****** (** ******) **** *** **** ****** **** * given *** **** ******* *** * ***** ****.

**** ***** *** ******** ** ** **** ********* ** ********** low ********, ****** *** **** ********* ** ****** ******.  ***** UPSes *** **** ******** ** ** ***** ** ********, ** buying ***** ***** ** ******* ** ** ******* ***** ** a *******. *** ******* ***** *** ****** ** ********* ****** *** ***** runtime ********* ** * ***, ********* ** ***** *** ***** performance. *******, *** ******* ****** **** ******* *********** ** * useable ***.

**** ***** ****** ******* ** *****, * ******* ***** **** help *** **** *** **** ******* ******** ** ********* *** how ****. *** ************* ********* ******* ***** ******* ** * curve *** ****** **** ****, **** *** ******** *****:

******* *:

******* *:

***** ****** ******* *** *** **** ********* ******* ******* ** battery *****. *** *******, *** *** ******* *, * **** of *** **** **** ************* *** *******, *** * ******* 450W **** **** **** ~* *******. *** *** ******* *, a *** ***** **** **** **** *** *******, * **** load **** **** ~** *******, *** * ******* **** * load **** **** * *******.

***** **** ************* ******* **** ******* ******, ** **** *** not ********* *** * *** ****, **** ******* ******* *********** **** *** ************ (** ***** ***** ********) *** ** ********** alternative.

**** ***** ***** ****** ** *****, ******* *** ***** ****** source *** ** ********. ******* ******* *** ********* ********* ** three ********* *****:

Consumer *** *******

*** **** ****** ******* ****** *** ***** ******* ******** ***** protectors, ********* ******** *** ******* ****** ***, *** *** ******** to **** **** ****** **** *******. *******, ***** ***** ********* are *** ***** **** ****** ******* ***** ** *** ******** devices *** **** **** * *** ******* *** *** *** good ********* *** ************ *******.

**** **** ******* **** ********-***** ***, *** *** ************ ****** ***** ****, *** ****** ***** would **** **** ****** ** *******, ***** ***** ** *** short ** ** ****** ********* ** ******* ****** *********.  ***** units *** *** ****** ***** ***********, *** **** ******* *********** like ******* *********** ** *** ****** ** ******. **** ******** units *** ******* ******** ** **********.

*****

******** ***** *** ***** *** ********** ********* ******* $*** - $500 *** **** ******* **************, **** *** ******* ***** ********* sized *** ***** ** *****.

Battery ****** ***** ********

******* ************ ****** ***** ****** *** *********** ***-******* ***** ******** equipped **** ********* ** *** *********. **** ****** ******* ** useful ** ***-*** ******* ******* ****, ***** **** *** ******* hardwired ******* *** ***** ** ****. ******* ***** **** *********** ****** ************ ***** ***** *** ******** ************ *** ************ ****** ***, **** **/*** ************ fused ******* ** * ******* ***. *******, ***** ***** ******** are ****** **** *** ****** ***** *** ***** ****** ********** like ******** *** ********* **** ********** ****** ***** *******.

*****

******* ******** ***** ******** *** ********* *** **** **** ********* way ** *** ********* ** ***-*** *******. ***** * ******* 8 - ** ******* ***** ****** *** **** $*** - $200, **** ** **** ~$** - $** **** ********* **** ******* non-battery ******** ********** ******.

Commercial *** *******

**** ******** ***** *** ******* ******** ***** ******** ***** **********, ****** **** ******* ******* ****** ********* *** *********, *** ** prices **** ***** ******* ******** ******.

********** ***** *** ********* ********* ** ********* ** *********** *****, and *** ******** ****** ********* ******** **** ********* ******** **** longer ********. *** *******, **** ************* (*****-**** ************** +* *******-**) **** *** *** ******* **** ****** ***** *** **** 6 *****, ** *** ***.  ***** ***** ***** ******* ******* ********** tools **** ****** **** ***** ***** *****, ********* *** ****, and ******* **** ****** ******. ** *******, ******** ******* ***** can ** ******** ** ******* *** **** **** **% *** cost ** *** **** ******.

********** ***** *** *** *** ****** *****, *** *** '****-**' power, *** ******* ******** ***** ** ***/***/****** *****. ****** ******** units **** *** ** ******* ******** **** ***** ** *********, commercial ***** ********* ******* ********* ***** ********. 

******** ** ***** *****-**** ***** *** ********* *******,****, ************* ******. 

*****

**** ********** ***** **** ** ***** $***, **** ****** ******** thousands ** ******* **** ***** ******* ***** *** *****. ***** the **** ********* ******, ***** **** ********* ***** *** ******* runtimes *** *** **** *******.

Factors ********* *******

******** ****** ** ****** *** ************* ****** ********* ***** * disclaimer ******* ******* ******* **** ******** *********. ***** *********** ******* that ******* **** ***, ************* ********* ****** *** *** ******* times.  **** ** ***:

******* ***:**** ****, ***** ******* **** **** **'* ******* ** ***** and ********** * ******, *** ** *** ***** ** *** internal ******* *** ******. *** * ******* ***-**** *******, *** same ******** ******** **** ******* ********* ** * **** **** eventually **** ******* **** ****, ** *** **** **** ** the *********** ** *** **** ******. ** **** *****, *** batteries ****** * *** **** **** * ******** ** * - * ***** ****** ******* ** ** ********. *******, ****** then * ******* *** ****** ****** **** **** ** ****** on *** **********.

***********: **** ********* *** ****************** **** ********* **** **** ****, and ***** ********* ** ****-********* ************ *** ********** ************ ******** as ********* ***** *****.  ** ********* *** *** **** ** *********, *************** ********** *****, they *** *********** **** ** ******* ***** ***** ********. ** many *****, ******* ***** ******* ******* ******** ** **** ** keep **** *********** ***** ******** ** ***** ****** *** ******* performance.

********* *****: ****** ******* **** ** ************, *** ***** ********, *******, or ******* *** ***** ************ ***** **** *** *** ******* were *** ********* *** ****** *********, *** ***** ***-******* ***** *** ****** battery ***** *****.

Extended ******** **** **** *****

**** ******** ******** (****, *** *****) *** ******, *********** ****** power ******* **** ********** ** ***** ******** ******* ****** *** more **** ********* **** ****** ****** ***** *** ***** *********** costs. *** *** ********* ****** ***** *** ************ **** *** **** ****** ** ***** *******.

****

**** *** * ******** *** *** ***** ************ ****

Comments (8)

*****

****** *** ******* *** **** *******. ************ ******* ******* ****** is * ******* ******* ** ******. *** ***** *** ********** forgets ** *** ** ***'* ***** ******** ****** * ***. Cost ** *** *** ****** **** **** ***'* ************* *** them **** ***** ******. *** ******* *** ****** ********* * number ** ********
**** *** ** *** ***** ** **** ***** ** * job ****.

* ***** ******* *********** **** *** * **** ***** ** UPS ******** ***** ** **** ******* ** **** *******. ******* the *********** ******* * *******, **** ***********, ** ******/****** ********** should ******* ******* ****** *******. ****, *** ********** ** ***** factors **** ********* ********* ****** *** ****
****** *****. * **** **** * ******* ***** ****** *** allow * ****** **** ** ******* **** ***** ** ****** versus * ****** **** **** ****** **** **** *****. **** would ****** *** ****** ***** ************* ** ******** ** ***********
*** ** *** ****** ** ******.

*******, *** ** *** ********* *** ******** **** **** *******? I **** ****** **** *** **** ***** ********* ** *** switch (*.*. ** ***** * **.* ***** = *** *****) as ** ****** ** ********* **** ****** * *** **** be ***** ** ******* ** **** ****.
* ****** ****** **** *** ****** ** **** ** **** more ******* *** ****** **** *** ****. *** ***** ** more **** ** ***** (** * * *****) *** ********** in **** *******. *** ********?

****** *****

***** ***:

**: "*******, *** ** *** ********* *** ******** **** **** *******?"

***** *** *** ***** *******:

*) * ***** **** ******** ** *** *** *** ****** of *** ****** ** ***** *** ********, ********** ***** ******* that *** ******. *** ***** ***** ****** ** ******** *** switch *** ****** ******** **** *** ******** ***** ** *** approach.

**** ********** **** ******** ** * ******** *** ** ** ** * *** over * *****. ***'* **** ****** *** ****** ** *** cameras *** **** **** **** *** ****** ******.

*** ****** ******** ** **** ********:

*) *** ****** *******, *** ***** ** ***** ****** **** the ******, *** *** **** *** ****** ******* ****** **** for *** *** *** ***** ** ****** ********. ***** *** based ** *** *** ******* ** *** *******, ****** **** the *** ********* ** *** ******.

*** **** **** **** ****** ****** ** ******* *********** *** changes ** ****, ** ** **** ***** ***** *** ******* that **** *** ****** *** **** ** ***** ** *********. The ******* ****** ** **** ***** *** *** ********'* ***** this ******, *********** ******** ********* ************ *** ***********.

**: "******* *** *********** ******* * *******, **** ***********, ** Online/Double ********** ****** ******* ******* ****** *******. ****, *** ********** of ***** ******* **** ********* ********* ****** *** ****
****** *****."

***** ********. *'** *** ******** ** **/***** ******* *** *** three *** ******** ******* ** **** ****.

* ** ******* **** * ******* **** ********* ******* ******* issues **** **** *** *********.*** **** ****** *** ***** ** , ******* **** *********. ********** ***** * **** ********* *** that ******** *********** ** *** **** *** ** ******* **** if. *** ********?

*** **** **** *** *** ** ******* "******" ***** ******* the ********* ********* **** *** *** ** ****** ******* ***** power **** *** ***, ** ***** *** ****** *** ****** drops **** *** *** ********* ** *** *** ** *** gen ****** ***'* ******. ** ******** **** * ***** *** see **** *** ** ***** **** ** *** ***** *** output ** *** ***, **** **** **** *** ******** *** problem.

*** **** ** *** ***'** ***** *** **** * **********. A *** ** **** **** **** ** ******* ******* *** real ********* ** **** ** ** ********** ***** ******* ** present; ***** *** *** *******/******* ****. ** ** **** ***'* AC ** ***** **** *** *** ******* *** ***** ********. Or ** *** *** ****** ** ** **** ** *** to ****** ********** **** *** ** ****** ** *** *********, and ****** *** *****. ********* ** **** ********* **** *** be * *******.

** *** ***'* **** * *****, *** ***** *** ******* the *** ******** *** *** *** *** ****** ** ** runs **, *** **** *** ******* ** *** *** *** with ** ** *****, *** ******* ********/********** *** *** **** a **** ****** ** *** **** ******* **** ***** ***** and ****. **** ****** **** *** ******** ****'* ******* *** problem.

* ****-*********** *** ** * ****** ****** **** * ******* type, *** *'* **** ********* ** ******/******-********** *** *** ******* critical ************. ***** ***** **** ** ******* *** ***, *** output ** ****** *** ******** **** *** ******* ** ** switching ****** *** *** ***** ** ** ****** ******** ** the *********, ****** ***'** *** * ******** ****** ***** *** because ** ****.

********* ** *** **** ** **** ***, ** *********** ** replacing *** ** ** *** ** ********* ******* *********/**** ***** conditioner. *** ****** ** **** ** **** *** *** * lot **** **** * **** ***, *** *** ***** *** it ******* *** *** *** *** *** ** ******* *** UPS *** *** ********* ** **** **** ******* *********. ************* even **** *** ******* **** ** * *** ** * 'try *** ***' ********.

**** ****.

* ***** ********** *** ** ****** *** **** ********* ** a ********* *** *** ******* ****** *****. **** ********* *** necessary ** ****** *** "*****" ***** ******. *** **** ******** need **** * ******* ** ******* ** **** ************ ** cover *** ******* ** *** *********. **** ****.

******* *** ** *** **** **** *** *********** ********** ***** define "*****" ***** **** * *********. *'* ****** **** ** has ** ** **** *** **** **** (***** ***** **** during *** ********** ** **-**) *** **** *** *** ****** to ****** **** ********* ** ******* ** *****. *'** ***** this *** ***** ********** **********, ********* *** ***** ****. ** would ** **** ** **** ** **** ***** ** ******.

***** ***!

"*****" ** ** ********* **** **** *** **** ******** **** 'out-of-phase' *********** ** ******* ****** ** ************ ******** (**: *********).

** *******, ********* *** ***** ********* (*********) *** * ****** that ** ***-** **** **** **/**** *** ***** ****** *** even ****** ** *** ******** **********.

******* ******** *** * ******* ***, *** *********** **** * fairly ******/****** ***** ** ******* *** ****.

*** **** *** '***** *****' ** *** **** ********** *** many *** ***** '**** **** ****' *******. *** ***** ******** normalize ** ******* *** ******* ** ** '*****'.

** *** ****** ******* ******** ** **** ****, *** * quick **** ** '***** **. ***** *****' **** ** *****.

******!

**** *** ***** ***** ****** ** **** ******* *** * suggest ********* ********* ** *** *** ** ******* ********* ** an *********** ** ******** **** ****/*** *********? ******* **** **** so **** ******, *** *** **** ******** **********, *** *** made ** ***** **** ***** **** ** *** ******** *** battery ****, **** *** ** * ****-** ***********, ** *** application *** ******* *** ****** ****.

** ** **** ** ********* * **-*******, ***** ******** ********* lose ******** ** ******* *** ** ********* ***'* **** *** until **'* *** ****, *** **** *** *** *****.

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