@Archades wrote:

Just got my opsi, still waiting on my 24vAC PSU. Can I power the rPI via usb and test the RTC feature without the 24vAC or do I just wait till I have the 24VAC and use only that, without usb 5v psu?

The Toro link you posted was an Australian one – if you are in Aus you can buy a 24vac power supply off the shelf from Jaycar (http://www.jaycar.com.au/productView.asp?ID=MP3032)