Power Over Ethernet Qs in Technology Corner Posted July 11, 2017 I'm tired so may not be parsing your question properly. My guess is the cameras are 802.3af for PoE, so no more than 15 watts? You won't find a double PoE injector. What you need is a switch that supports PoE, and connect the cameras to that. You'll get a four port PoE switch for about 50 quid. Each port will provide up to 15 watts for 802.3af which should be plenty for most cameras if they state they're 'PoE' compatible. Something like this - 4 ports of 10/100Mbps, with PoE. Will be a bit more if you want Gbps connectivity, but why would you want that for a couple of cameras. Be careful how you wire your home network with extra switches Probably will be fine, but personally I prefer the 'proper' way to do things, otherwise you'll run in to weird and wonderful issues.