Who has setup a wireless alarm system - via cell in a garage or storage locker?

Pretty simple to do. There are kits you can purchase to do just this. Assume you just want a contact to know when the roll up has moved. Motion detection may have you finding rodents.
simplisafe or brickhouse come to mind.

 

Summer gets into the 90s and winter in the low 20s.

I have done this, but what does temperature have to do with the system?

 

He is asking if the wireless units perform OK with temp extremes. Batteries have been known to be problematic at very low temps and wireless systems are inherently battery powered. Also, sensors (particularly motion) behave differently at temperature extremes.

I'm not a fan of wireless security. But, I recognize they are much better than they were. Status and watchdog systems and wifi compliance have changed the equation.

Hardwired is more difficult/expensive but generally less problematic in that there is no single source failure mode (IE the wireless transceiver going down/ RF interference)

 

Our house is completely secured with a (professional) wireless alarm system. Contacts on windows and doors, acustical sensors for window smashing or cutting (they discriminate against glass items falling on the floor). No motion sensors.

Installation is very swift and easy. The components are very low key (except the outdoor sirene ), you will notice only if you know for what to look. The system phones to four phone numbers in case of an alarm. You can even speak with the burglars and yell ****** at them, if you like . Not one single false alarm since installation in 2012. Costs for the whole house about 8,000.-- €. The only drawback is that you should replace all batteries every 2 years, but that is done with a Saturday afternoon..

 

Re-reading his post I see the tactic inference to batteries. What threw me was the specific comment about electricity being available, so I jumped the conclusion.

Regardless, batteries can be problematic at any temperature. Just last week (ambient in the 80s) the A23 in my key fob stranded me. That battery was only six or seven months old, so later in the evening I replaced all A23 batteries, as well as putting an extra in the glovebox.

Okay, back to the house. We have a Honeywell system that works very well with no issues. The backup system is my Winchester with 4/0 buckshot … no batteries and no electricity required.

 

I use ADT and have 8 wireless cameras in my home incl one in the garage in my Florida home. Here is an actual picture taken from my laptop of what I see at 7:10 pm (a few minutes ago) while it is black outside. I have a remote light that comes on at 8:30 that turns that picture in colour.

I am 1500 miles away from that picture. Never had a problem.
Image Unavailable, Please Login

 

Excellent system, same here.

Another option to my favorite garage door openers are the remote status of garage door (Open, Closed, Locked) on your PC or Smartphone
and most importantly, a log history of events.
You can use most existing garage doors by adding this wall panel
Control Panel (888LM)
http://www.ebay.com/itm/390574264798
along with their MyQ 828LM LiftMaster Internet Gateway

8500 Liftmaster Elite Series® Wall Mount Garage Door Opener | eBay
The reason I love these residential jackshaft door openers is for the additional locking mechanism, the track deadbolt, aka "Power Door Lock 41A6102"

You've probably seen how easy it is to defeat the standard garage door, as in E Texas video:
https://www.youtube.com/watch?v=kSO_HTBHLFI

This track deadbolt stops that entry after he emergency release is compromised and the only door opener to have this feature is the Liftmaster