Hunter0896

Good Day, I Installed an Texecom Premier elite alarm system and I would like to know how long an 12 Volt 18Ah will last if the power went off. And should a 50va 16Volt Transformer be enough Here is my alarm specs. 13X PIR Detectors 6X Door Switches 9X Panic Buttons 8X Fire Detectors 3X Dual Beam outdoor beams 2X LCD Keypads 1X RF ADT communicator 1X GSM Communicator 1X 30watt Siren 2X Sound Bombs 1X Remote Reciever. Thanks alot