Dynamix UPSD1200 Defender 1200VA (720W) Line Interactive UPS, 3x NZ Power Sockets with Surge+Battery Backup, 3x NZ Power Sockets with Surge 936J Netguard Smart Monitoring, USB Cable Included

Okay ish for the money, but buying something that works in the near future.

The included management software is absolutely terrible. It often locks up using 100% of one thread on the CPU, and also managed to render all of the COM ports on my machine unusable by keeping them open to scan for RS-232 UPS's. It was so bad I wrote my own software for it. Need I say more? If you want your machine to auto shut-down, buy a different unit. (if you wish to write your own UPS software, take a look at the Network UPS tools source code for command sets.)

All the UPS circuitry is very inefficient, to the point where it works very well as a footwarmer...view more Okay ish for the money, but buying something that works in the near future.

The included management software is absolutely terrible. It often locks up using 100% of one thread on the CPU, and also managed to render all of the COM ports on my machine unusable by keeping them open to scan for RS-232 UPS's. It was so bad I wrote my own software for it. Need I say more? If you want your machine to auto shut-down, buy a different unit. (if you wish to write your own UPS software, take a look at the Network UPS tools source code for command sets.)

All the UPS circuitry is very inefficient, to the point where it works very well as a footwarmer. Although this means due to thermal limits it cannot actually supply high loads for long periods of time. Internal temperatures sit at 70C just idling on mains power with the battery fully charged.

The output is a square wave. Not all mains equipment likes to run off square waves.

To top this sorry lot off, it has 'crashed' on me, flipping to battery mode for no reason and 5 seconds later shutting down. This took out my desktop and 2 servers. Other machines not on the UPS stayed up, and no lights dimmed indicating a brown out.

If you actually want to protect devices against power-outages, DO NOT BUY THIS UNIT. Or any of the defender range. I imagine they will all suffer the same set of issues.

I bought this back in 2016. It works well as a simple battery backup BUT if you want the functionality of automating the shutdown of your computer you need the comms cable to be plugged in. Having the cable plugged in causes the device detection noise to continually go on and off (about every 10 seconds) as it "plugs and unplugs" effectively. This is a real issue when you have the audio on your computer and you hear the connect and disconnect tone while trying to listen to something. Similar to if you plug in and pull out a USB stick into a slot. I thought there was something wrong with the unit so got in touch with the manufacturer to...view more I bought this back in 2016. It works well as a simple battery backup BUT if you want the functionality of automating the shutdown of your computer you need the comms cable to be plugged in. Having the cable plugged in causes the device detection noise to continually go on and off (about every 10 seconds) as it "plugs and unplugs" effectively. This is a real issue when you have the audio on your computer and you hear the connect and disconnect tone while trying to listen to something. Similar to if you plug in and pull out a USB stick into a slot. I thought there was something wrong with the unit so got in touch with the manufacturer to be told "We confirm that you serial number Defender1200 will behave as you describe as this is normal for this device".
Very disappointing. I've unplugged the comms cable now and use it without any smarts. ie. just a battery backup when the power goes out.

Excellent UPS. Love it.
This is protecting my DellR610 virtualisation server, which runs my machines in my home lab and my Plex server.
Runs at 20% load :) Excellent UPS. Love it.
This is protecting my DellR610 virtualisation server, which runs my machines in my home lab and my Plex server.
Runs at 20% load :)

By: RichardH599 28/05/22

Verified Owner

I'm using this to supply a small NAS with power until it can safely shut down and an ONT, router and hub. I'm happy with the way it is working. Make sure you grab the latest software from the website as it gives access to a couple more features. I'm using this to supply a small NAS with power until it can safely shut down and an ONT, router and hub. I'm happy with the way it is working. Make sure you grab the latest software from the website as it gives access to a couple more features.

This is a great value unit and have used them for servers and desktops. USB cable for communication works well. Use only the Windows Netguardw 1.01 off the website http://powershield.com.au/ not the JAVA/Web based software that is on some cdroms. Allows configuration for shutdown. Email communication for self test, battery replacement etc. Easy to replace batteries after 3 years by pulling off the front. 3 Battery backed ports for you computer and 3 surge only for your Laser printer. Reliable as well. Great price, great piece of gear. This is a great value unit and have used them for servers and desktops. USB cable for communication works well. Use only the Windows Netguardw 1.01 off the website http://powershield.com.au/ not the JAVA/Web based software that is on some cdroms. Allows configuration for shutdown. Email communication for self test, battery replacement etc. Easy to replace batteries after 3 years by pulling off the front. 3 Battery backed ports for you computer and 3 surge only for your Laser printer. Reliable as well. Great price, great piece of gear.

So far I have used it for about 3 weeks. As we live rural we use it as a backup for our wireless internet and phone connection, it should be able to keep our connection going for about 6 hours if we have a power cut. The only negative so far is that the sockets for surge protection only and surge protection and backup are orientated differently and also don't allow enough space to use power supplies next to each other. I needed to use a power board in between to use two power supplies in the backup circuit. So far I have used it for about 3 weeks. As we live rural we use it as a backup for our wireless internet and phone connection, it should be able to keep our connection going for about 6 hours if we have a power cut. The only negative so far is that the sockets for surge protection only and surge protection and backup are orientated differently and also don't allow enough space to use power supplies next to each other. I needed to use a power board in between to use two power supplies in the backup circuit.

Not the first one of these I purchaed. Love the last one which has been working well for a couple of years without any issues I had to have another. Not the first one of these I purchaed. Love the last one which has been working well for a couple of years without any issues I had to have another.

Best Value and pretty robust. Protecting high value equipment. Best Value and pretty robust. Protecting high value equipment.

Had it for 3 weeks now. Not had any black outs but has been working fine, does not have clicking of relays which another brand did. Fan noise acceptable. Had it for 3 weeks now. Not had any black outs but has been working fine, does not have clicking of relays which another brand did. Fan noise acceptable.

Plugged in and charged. Used for lift chair on case of power failure, enough power to get chair i upright position with light attached also Plugged in and charged. Used for lift chair on case of power failure, enough power to get chair i upright position with light attached also

This is a great UPS for a small office, I was suffering small power outages and this keeps my server and fleet of raspberry pi’s alive through those breaks up to 25mins This is a great UPS for a small office, I was suffering small power outages and this keeps my server and fleet of raspberry pi’s alive through those breaks up to 25mins

Happy with it after one month. Nice and silent! (warning - some other makes have fans that can be noisy) iMac monitors it via USB cable no issues and without any updates required.
Good display showing input and output status/volts Happy with it after one month. Nice and silent! (warning - some other makes have fans that can be noisy) iMac monitors it via USB cable no issues and without any updates required.
Good display showing input and output status/volts