Our station was lucky enough to have automatic roller doors fitted in the eighties after the CEO at the time, Don McArthur, was shown the old fold up jobs that took 5 blokes 15 minutes to open them.
They go up when the pagers go and we have never had a security issue. Intruders would have to be quick wouldn't they? With vollies rocking up all over the place
The main advantage is that it guarentees members access to the station when there is a call in case a station key holder does not respond. I have heard of a few instances in different Brigades where a crew has been in the carpark unable to access station!
On to the back up power. The 12 volt battery back up sounds good. The doors can still be raised by chains manually, but to knock the motor out of gear and get the chains down takes a little while. It us quicker to run an extension cord to the 5kva generator on a slide mount in one of the appliances and kick in in the guts. In fact if I'm around and the power goes down I head to the station to check auxiliary power is on, battery back ups have worked and actually set up the cord to generator ready to go.