Hi I have been using the extenders for a few years now with no problem. I use them to go to an outside room on the property. Yesterday i had a solar battery and new solar system fitted. The outside room although still on the same electrical box the fise is not attached to tge battery back up. I have tried the extenders and they look like they connect eg all 3 lights with a flicker for transmission but they dont work . As soon as i take the extennder back into the house it works . Anyone any ideas ?