Leave the electricians for the electricity, get a local alarm company for the alarm.
And get 3 quotes and go with the one you feel most comfortable with, they will specify kit they are familiar with.
The most popular 4x4 in some snowy country (can't remember where) and used by their postal and emergency service iirc. Very basic transmission and it used to be a manual selection puch unit I think.
Hi,
Yes it is most likely the back up battery, relatively cheap to have it replaced and would also negate the risk of damage to the main panel through trying to charge a defective battery.