i want to upgrade my Homeserver with6 HDD's for an RAIDZ2. I don't want the server to go off while performing read operations in the raidpool and possibly corrupting all the data with this so i want to use an UPS.
Importent is, that it is cheap, quiet and able to shutdown my server in case off an blackout.
So i took a look at this model (BX700UI), because i know there is a functioning daemon for my CENTOS system for APC UPS.
It is cheap and makes no noise while not operating in emergency mode so thats fine.
Problem is, normal users are not able to change the battery but i don't care.. Its not that big deal openign the case an improvising a bit.
But the big problem i have with it is, that some comments say it drains 13 to 20 W in standby with loaded battery.. That is a bit high and will cost ma about 100€ a year to run.. thats kinda inaceptable.
Do you guys have experience with this unit or knoq a better one that is more efficient? I dont want to spend more than 150€ (the lesser the better) and i only need about 100W.
Personally I would say below 20 watts is actually pretty good.
Bear in mind that the ups is essentially a micro computer that is managing power to the drawing devices, keeping the battery topped up and other functions like shutting down attached devices. (my 2.7kw draws about 100w when charged)
By user changeable battery, they mean you need to take the unit apart. Whilst mine is user replaceable and the batteries are in a large removable tray.
The thing I will say is make sure that it is an online ups not a switching. Basically the attached devices are always run off of the battery, but there is no lag when the power in does drop. Switching kinds can damage attached devices when they do switch.
Well.. My Server draws not more that 40W atm (With 3 HDD's) so 20 W would increase the power about 50% Here in germany energy is expensive as F*ck.... But ok i see your point. I read a few bad stories about the Bluewalker so i will stick to the APC... Even with the power consumption.
It is an Inline UPS so it will switch within a few ms whats not perfect but fine for my use.
I have an 300 W PSU in my Server (who is not draining 60W after adding HDD's) so the Condensators of the PSU will be able to bridge over the time until the UPS kicks in.
I realy realy can recommend you APC Smart UPS! I have those protecting all my gear; the smallest I have is 750VA and than a 2500VA and a 5000VA one; they are great. You can hook em up to one machine over USB or if it powers more than one there is a network interface card (which is overly expensive for a stupid embeded webserver XD ) but at least there is the option.
It switches so fast not even a switch, raspberry pi or anything notices the falling; I measured it once with a oscilloscope and the power did not drop below 224V before the UPS had it up again.
And it manages to keep at 94-97% efficiency even at below usual loads (only accesspoint running) and near maximum load.. everything running.
You can't really go wrong with APC, but I'd personally recommend CyberPower. You can get a pure sine wave CyberPower UPS for very cheap, and their "powerpanel business edition" is great if you have several servers connected to a single UPS.
Thank you all, i will go with my first try. An APC.
Pure sinus is a bit too perfect for me... It is a bit more expencive and i already know how to configure an APS at CENTOS so i will take a look at it for another funny project of me where i will need pure sinus.
I would like to use the SMT750I but this would eat up all my budget for the next month...
Great choice. I'm using the VI 1000 and it's being working great for me. Beware of the software, it's a bit sketchy and gave me some troubles (monitoring server pinning my CPU @ 40% all the time). Other than that the thing itself is very well built and the battery kicks in istantaniously.
I have a raspberry pi hoocked up to the big USV and monitoring it over USB; when the bat is at 20% left it loggs into the servers via SSH and shuts them down; saved me the 200+€ for the network adapter for the USV.
Yeah I did the same thing with my monitoring server and CyberPower's business edition software. It's not "supported" but it still works fine with their consumer UPSes.