Nikitas wrote:There is a nice sticker used in the States: this house is insured by Smith and Wesson. Humorous but not a solution
Re the electricty supply to a security system, have you thought of a battery powered setup under constant charge from a photovoltaic array on the roof? That would bypass the mains and ensure that the security system is always on regardless of power cuts or fluctuations.
Except in winter when the sun doesn't shine for 5 days on the trot!