Readynas 3220 + compatible UPS

Hi guys,

iam using a Readynas 3220 device with a more or less broken APC UPS (750VA - very old model! - not compatible with Readynas 3220 via USB slot). In the near future i want to replace the old model with a new one. Does anyone of you knows which UPS is 100% compatible with the Readynas 3220? It should have the the following specifications:

- Rackmount

- around 1500 VA

- long life batteries (changeable)

- RJ 45 interface (+ frontview)

- USB compatible with Readynas 3220

- good price/performance

- european powersupply standard (230V - Germany)

If there are any further questions, don't hestitate to contact me! Thank you for your response!

Best regards.