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)

Brian

Thanks for putting out this article. Surveillance without battery backup is a problem waiting to happen. Too often the integrator forgets to add or let's their customer supply a UPS. Cost is the big reason that they don't automatically add them into their design. The correct UPS should eliminate a number of problems
that may be the cause of call backs to a job site.

I think further information into the 3 main types of UPS products would be very helpful to your members. Knowing the differences between a Standby, Line Interactive, or Online/Double Conversion should produce produce better results. Also, the importance of power factors when comparing different brands can help
reduce costs. A unit with a greater power factor can allow a 2000VA unit to produce 1760 watts of backup versus a 2200VA unit that yields only 1640 watts. Most would assume the 2200VA would automatically be superior in performance
due to its higher VA rating.

Finally, how do you calculate PoE switches into your example? I have always used the full power potential of the switch (i.e. 16 ports X 15.4 watts = 246 watts) as my number to calculate even though I may only be using 12 cameras at that time.
I always design with the future in mind in case more cameras are needed down the road. 246 watts is more than 72 watts (12 x 6 watts) you considered in your example. Any thoughts?

Thanks again

Hello Rod:

Re: "Finally, how do you calculate PoE switches into your example?"

There are two basic options:

1) I think your approach to use the max output of the switch is smart for planning, especially newer systems that can expand. The total power needed is whatever the switch can output combined with the overhead would be the approach.

Take for example this unit with 10 W overhead and up to 50 W PoE over 4 ports. You'd just strike the values of the cameras and roll them into the switch demand.

The second approach is more granular:

2) For mature systems, PoE power is still issued from the switch, but you take the actual wattage values used for PoE and add those to switch overhead. Plans are based on the max demands of the cameras, rather than the max potential of the switch.

The risk with this second option is lacking flexibility for changes or adds, so it only makes sense for systems that will not change and have no plans of expansion. The benefit though is that UPSes are not overspec'd using this method, potentially avoiding expensive overcapacity and maintenance.

Re: "Knowing the differences between a Standby, Line Interactive, or Online/Double Conversion should produce produce better results. Also, the importance of power factors when comparing different brands can help
reduce costs."

Great feedback. I'll add sections on PF/power factors and the three UPS function methods to this post.

I am running into a problem when generator testing creates issues even with UPS installed.NVR gets spiked and locks up , cameras need rebooting. Apparently using a more expensive UPS that utilizes transformer is the only way to protect from if. Any comments?

The fact that the NVR is getting "spikes" while running the generator indicates that the UPS is either passing dirty power from the gen, or maybe the spikes are really drops from the UPS switching on and off if the gen output isn't stable. If possible take a scope and see what the AC looks like at the input and output of the UPS, that will help you identify the problem.

The type of UPS you're using can make a difference. A lot of UPSs just pass AC through without any real filtering as long as an acceptable input voltage is present; these are the offline/standby type. So if your gen's AC is dirty that can get through and cause problems. Or if the UPS senses an AC lose it has to switch internally from the AC source to the batteries, and spikes can occur. Depending on your equipment this can be a problem.

If you don't have a scope, you could try running the NVR directly off the gen and seeing if it runs OK, and then try running it off the UPS with no AC input, and finally plugging/unplugging the UPS from a wall outlet to see what happens when power comes and goes. This should help you identify what's causing the problem.

A line-interactive UPS is a better choice than a standby type, but I'd only recommend an online/double-conversion one for mission critical applications. These never pass AC through the UPS, the output is always fed directly from the battery so no switching occurs and the input AC is always filtered by the rectifier, though you'll see a slightly higher power use because of this.

Depending on the cost of your UPS, an alternative to replacing may be to use an automatic voltage regulator/line power conditioner. You should be able to find one for a lot less than a good UPS, and you could put it between the gen and the UPS or between the UPS and NVR depending on what your testing indicates. Unfortunately even with the testing this is a bit of a 'try and see' solution.

Good luck.

I would definitely use an online UPS when connected to a generator for the reasons stated above. More expensive but necessary to handle the "dirty" power output. You will probably need only 5 minutes of runtime in your calculations to cover the startup of the generator. Good luck.

Perhaps one of you guys with the appropriate background could define "dirty" power from a generator. I'm pretty sure it has to do with the sine wave (heard about this during the hurricanes of 04-05) but have not had access to anyone with knowledge to discuss in depth. I've heard this can wreck electronic components, sometimes not right away. It would be good to know to pass along to owners.

Hello Jon!

"Dirty" is an ambiguous term that can mean anything from 'out-of-phase' frequencies to general spikes or undervoltage delivery (ie: brownouts).

In general, computers are cycle sensitive (frequency) and a source that is out-of sync with 50/60Hz can cause errors and even damage to the internal components.

Erratic voltages are a problem too, and electronics need a fairly narrow/stable input to operate per spec.

The need for 'clean power' is why some generators are many UPS claim 'Pure Sine Wave' outputs. The added circuits normalize or correct the outputs to be 'clean'.

We are adding several sections to this post, and a quick note on 'dirty vs. clean power' will be added.

Thanks!

When you think about adding to this article may I suggest including reference to the use of LiFePO4 batteries as an alternative to standard lead acid/AGM batteries? Because they last so much longer, use the same charging technology, and are made in sizes that match many of the existing UPS battery size, they can be a drop-in replacement, if the application can justify the higher cost.

To me this is generally a no-brainer, since standard batteries lose capacity so quickly and we generally don't find out until it's too late, but they are not cheap.

Login to read this IPVM report.
Why do I need to log in?
IPVM conducts unique testing and research funded by member's payments enabling us to offer the most independent, accurate and in-depth information.

Related Reports

July 2018 IP Networking Course on Jun 19, 2018
The last chance to save $50 on registration is this Thursday, June 21st. Register now and save. This is the only networking course designed...
Axis Releases First New Access Controller In 5 Years (A1601) on Jun 15, 2018
It has been 5 years since Axis 2013 entry in the physical access control market, with the A1001 (IPVM test). Now, Axis has released its second...
Four Major Outdoor Camera Install Problems on Jun 14, 2018
Over 140 integrators told us the top four camera installation mistakes that lead to unexpected problems and failures. Their comments often...
China Public Video Surveillance Guide: From Skynet to Sharp Eyes on Jun 14, 2018
China is expanding its video surveillance network to achieve “100%” nationwide coverage by 2020, including facial recognition capabilities and a...
Access Control - Time & Attendance, Mustering and Mantraps Guide on Jun 13, 2018
Electronic access offers features that traditional mechanical locks cannot. While these features may not be as fundamental as keeping doors secure,...
Powerline Networking For Video Surveillance Advocated By Comtrend on Jun 08, 2018
Powerline networking, using existing electrical wiring, has been around for many years. Indeed, over the years, some video surveillance providers...
H.265 / HEVC Codec Tutorial on Jun 07, 2018
H.265 support has improved significantly in 2018, with H.265 camera/VMS compatibility increased compared to only a year ago, and more manufacturers...
Princeton Identity Access 200 Iris Scanners Examined on Jun 05, 2018
Iris recently registered a big jump as a preferred biometric in our Favorite Biometrics survey, but access-ready options can be difficult to...
Dahua Products Are Not GDPR Compliant, No Products Can Be on May 29, 2018
Dahua products are neither GDPR-compliant nor certified, contrary to their marketing. The reason is that no products can be, as the EU does not...
VMS Server Sizing on May 25, 2018
Specifying the right sized PC/server for VMS software is one of the most important yet difficult decisions in IP video surveillance. In the past...

Most Recent Industry Reports

IFSEC Show Report - Live From London on Jun 19, 2018
IPVM is live from London reporting on the IFSEC show. The Chinese have taken over the UK, centered on Hikvision, flanked by Dahua, Huawei and a...
Axis Guardian - Cloud VMS for Alarm Companies on Jun 19, 2018
Axis has struggled to deliver a cloud-based managed service video platform. Video service providers have utilized AVHS for over a decade, and have...
IPVM Vulnerability Scanner Released on Jun 18, 2018
IPVM is proud to announce video surveillance's first and only cybersecurity vulnerability scanner. This tool allows quickly and simply...
Hikvision Corrects False Cybersecurity Announcement on Jun 18, 2018
Hikvision has corrected a false cybersecurity announcement that claimed a British government-sponsored program endorsed the cybersecurity of...
July 2018 IP Networking Course on Jun 16, 2018
The last chance to save $50 on registration is this Thursday, June 21st. Register now and save. This is the only networking course designed...
The Dumb Ones: PSA's Bozeman On Cybersecurity on Jun 15, 2018
The smart ones are the hundred people who flew to Denver and spent $500+ on a 1.5-day conference featuring Dahua as a 'cyber responsible partner',...
Amazon Ring Launches $10 Monthly Professional Alarm Monitoring on Jun 15, 2018
Amazon's Ring has announced an alarm system with 24/7 professional alarm monitoring for $10 per month, a fraction of the $30+ per month traditional...
Axis Releases First New Access Controller In 5 Years (A1601) on Jun 15, 2018
It has been 5 years since Axis 2013 entry in the physical access control market, with the A1001 (IPVM test). Now, Axis has released its second...
Hikvision 12MP Fisheye Camera Tested (DS-2CD63C2F-IV) on Jun 14, 2018
Hikvision's DS-2CD63C2F-IV is their flagship panoramic camera, with a 12MP imager, 15m integrated IR, smart codec, and more. We tested the 63C2 in...
Four Major Outdoor Camera Install Problems on Jun 14, 2018
Over 140 integrators told us the top four camera installation mistakes that lead to unexpected problems and failures. Their comments often...

The world's leading video surveillance information source, IPVM provides the best reporting, testing and training for 10,000+ members globally. Dedicated to independent and objective information, we uniquely refuse any and all advertisements, sponsorship and consulting from manufacturers.

About | FAQ | Contact