Need UPS Suggestions To Keep System Running For 8 Hours.

Here are some common ones used for video systems:

• APC
• Minuteman UPS
• Cyber Power

Eaton 5SX 1250 UPS with 3 EBMs
Runtime: 652 minutes
Eaton Part Number(s):
5SX1250AU ($800AUD) + 5SXEBM48R2U ($670AUDx3) (3)

Total Price is around $2810 in AUS and that is based on a draw of 100watts at 240v

The issues you will come across are budget, charge time and also battery wear.
Might be worth looking into a small petrol or diesel generator

Okay thank great thank you.

For that long of runtime, you are better off with a small to moderate UPS in conjunction with a small generator. 

Let me ask this, how often is this system expected to be utilized? Daily? Only during unplanned outages? That will make a big difference. 

It is at a remote site and will only be used during unplanned outages. It will be as much to monitor equipment as it will be for security. We may have to go with a shorter run time.

Good suggestions already in the thread.  For the most part battery backups should be used for very select cases, to keep things going during short power outages and give you ample time to properly shut devices down or to keep things going while power is switched over to a generator backup.  I don't think battery backups were ever intended to provide extended amounts of time powering devices. I remember back with the APC modular units, you could have a main controller and about 6 great big, heavy battery add-on units but could still only get a few hours of power for most server based systems.

Seems like a shorter run time is what I should be looking at. Thank you everyone