ev charging safety insurance compliance power monitoring arc fault fire extinguishing ball alternative sprinkler system freeze protection flame detection camera relay output e-bike shelter fire system wireless retrofit pressure gauge sprinkler riser wireless fire control 4g cat-1 power monitor co alarm electrochemical gas detector lpg fire alarm panel cloud platform lora gateway sounder strobe 100db en 54-3 manual call point resettable wireless gas detector catalytic wireless fire panel oem bms integration en 54-2 wireless sounder strobe bulk supply vad en 54-23 wireless call point wholesale smoke detector tester as 1851 nfpa 72 facility manager 8-hour battery auto smoke clear alarm capture usb export bluetooth app 4-pack smoke detector private label retail bulk basement use hallway use bedroom use airbnb use rental use apartment use ukca fire alarm great britain cpr fire alarm notified body declaration of performance en54 wireless heritage retrofit en 54-25 en54 flame detector atex zone en54 beam detector