CHF209.–
APC Back-UPS Pro
900 VA, 540 W, Line-interactive UPS
Questions about APC Back-UPS Pro
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You won't find any information about network, IP, etc. for this UPS because it can't be managed via network. You are left with USB or serial.
Unfortunately, there are two APC900 models - old and new. The new models need no. 164, the old ones need no. 123. Unfortunately, I ordered no. 123 first and then had to send the battery back. Tip: simply remove the old battery and compare the photo. If it is split in two, it will be no. 123. If it is a single large block, it is no. 164 (just look at the photos at Galaxus).
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Hello Yoichi, Yes, the cable was included in my delivery.
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This will probably not be enough. Because if your PC is running at full load, it will "say" more than 540W. It would be helpful to know which power supply you have, the UPS should have the same maximum output as your power supply (otherwise the power supply can only draw as much power as the UPS delivers). The graphics card and CPU alone draw more than 540W under full load (according to digitec, up to approx. 700W and this does not include fans and other components). It also plays a role what your goal of the UPS is, should the operation be ensured in the event of a short power failure, or should the UPS also last longer? Then it is no longer the maximum output power but the capacity of the battery that is decisive.
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The output of this device is low. From the manual, maximum output: 540W or 900VA
That is not included with this UPS. I used one from an old PC.
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Hello, I have not measured it, but the UPS has an efficiency of 97.4% in no-load operation. At 540 watts, this makes a loss of approx. 14.04 watts. However, since the UPS should be max. 70% loaded, this makes approx. 9.8 watts.
Unfortunately, the product manager was unable to provide any information on this matter, so we can only ask you to contact the manufacturer directly. We are sorry about this: https://www.apc.com/hr/en/support/contact-us/
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Hi, I have a DS-Slim that works exactly the same, just perfect. The way I got to know Synology, it will also work with your NAS.
In my knowledge, the UPS has a USB interface for Power Management by one device, like a server or NAS. I am joy sure you can use the SNMP protocol over USB
Hi Marvin, there is a fan inside, but it is quieter than my NAS. However, switching to battery is clearly audible (several times a day for me). The behaviour of the display cannot be influenced, not even by APC software ... but it switches off automatically. Unfortunately, the shutdown only works via USB. The network connections cannot be used in this way. I have connected the UPS to the NAS via USB and shut down my WIN server from WinNUT. MfG digimouse
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The C13 connection can be mitigated with adapters (e.g. https://www.digitec.ch/de/s1/product/steffen-umwandlungsstecker-3-pol-typ-j-stromadapter-240497) or appropriate busbars. For the push message, this UPS must be connected to a "software" (i.e. PC or similar), "DIY" solutions, e.g. with Raspberry Pi, are of course also great and simple. Otherwise, the thing simply beeps loudly when configured accordingly. I have several of these UPS in use, partly on NAS (with such software) partly "dry" on network components. I reckon with min 5 max 10 min at half the nominal load (depending on the type of device).
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