I installed my hardwired spotlight camera pro a month ago and it worked well. I think we must have had a power cut while away at New Year and now it won't work. The temperature while we were away was -5C but now it ie 8C. I have checked that there is mains power to the connectors and the camera works on battery. I have been sent a bettery replacement which also won't work on mains but does on battery . I suspect the problem is in the transformer on the base unit. I bought this as a set of 2 and now the second one has failed was there a bad batch of hardwired kits?