New To Mac-Forums?

Welcome to our community! Join the discussion today by registering your FREE account. If you have any problems with the registration process, please contact us!

Get your questions answered by community gurus Advice and insight from world-class Apple enthusiasts Exclusive access to members-only contests, giveaways and deals

Join today!

 
Start a Discussion
 

Mac-Forums Brief

Subscribe to Mac-Forums Brief to receive special offers from Mac-Forums partners and sponsors

Join the conversation RSS
Switcher Hangout The place for switchers to discuss their new machines, and how to work with OS X. General support can be had here for newbie stuff, like "How do I restart my new iMac?" :)

UPS for iMac 21,5" ?


Post Reply New Thread Subscribe

 
Thread Tools
tantalos

 
Member Since: May 07, 2010
Posts: 1
tantalos is on a distinguished road

tantalos is offline
Hello everyone,

I need your help/advice, I've been trying to buy a new UPS for my iMac 21,5" and I'm at a loss. I can't decide what's the "VA" necessary for my machine. I'm planning to plug my router , plus an external hard disk drive of 500GB on the UPS, so I was wondering if a UPS 550VA is enough for my needs.

This is what I was thinking of :

APC Power-Saving Back-UPS ES 8 Outlet 550VA 230V CEE 7/7

Thanks!
QUOTE Thanks
chscag

 
chscag's Avatar
 
Member Since: Jan 23, 2008
Location: Fort Worth, Texas
Posts: 39,669
chscag has a reputation beyond reputechscag has a reputation beyond reputechscag has a reputation beyond reputechscag has a reputation beyond reputechscag has a reputation beyond reputechscag has a reputation beyond reputechscag has a reputation beyond reputechscag has a reputation beyond reputechscag has a reputation beyond reputechscag has a reputation beyond reputechscag has a reputation beyond repute
Mac Specs: 27" iMac i5, 3.2 GHz, iPad 3, iPhone 5c, 3 iPods, OS X Mavericks

chscag is offline
An UPS serves two purposes: Prevent data loss in the event of a power shutdown, and smooth out the AC (remove ripple, prevent line spikes) to your machine.

With that said, I would look for an UPS that provides at least 750 VA and is compatible with OS X. You want compatibility so that your iMac will be able to effect a controlled shutdown when the AC mains are shut off.

Regards.
QUOTE Thanks
cptkrf

 
Member Since: Dec 08, 2009
Location: The same as Sheldon Cooper - East Texas
Posts: 394
cptkrf is a jewel in the roughcptkrf is a jewel in the rough
Mac Specs: MacBook Air 2013, MacMini,2013, Intel Core i7, 16gb, 27" Thunderbolt display (Highly recommended!)

cptkrf is offline
For your purposes, Watts = VA * .6. That won't pass in an electronics examination, but is close enough for estimating a UPS. So that UPS is about 300 watts. Or a little more.

Your IMac will take most of that capacity (about 250 watts). The router and USB drive will have trivial current consumptions - you can tell from the data on the wall transformers.

You will be very close to maxing out with that model. As chscag stated, you need to move up a notch to at least a 750. Also, remember that the VA number on a UPS is to indicate maximum output wattage, not runtime. You can have a UPS that will keep your Mac going for a only few minutes, or a model with the same VA that will run it for days. Those are two different ratings for a UPS that you need to decide on.

You have noticed that the UPS that you quoted is for 230 volt input? Very unusual input voltage for the average Mac user.
QUOTE Thanks

Post Reply New Thread Subscribe


« New Member + General Question :) | Mac Talent? »
Thread Tools

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts
BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are Off
Forum Jump

Similar Threads
Thread
Thread Starter
Forum
Replies
Last Post
iMac Powered Through UPS oldfella Switcher Hangout 16 04-27-2010 01:06 PM
Which UPS System for Mac Pro? vja4Him Other Hardware and Peripherals 7 03-13-2010 09:38 PM
UPS malware maurajbo Running Windows (or anything else) on your Mac 2 06-19-2009 03:22 PM
UPS for Imac adamchew Apple Desktops 3 01-04-2008 08:25 PM
Sick of Micro$oft's BS and UPS craptacular service. leecho7 Schweb's Lounge 11 09-18-2007 12:51 AM

All times are GMT -4. The time now is 02:56 AM.

Powered by vBulletin
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
X

Welcome to Mac-Forums.com

Create your username to jump into the discussion!

New members like you have made this community the ultimate source for your Mac since 2003!


(4 digit year)

Already a member?