Tp Link Av1000 power line adapter

Hi,

I have a power line adapter going from house to garage which is about 6metres from the house. The adapter was working perfect. I got solar panels installed on garage roof and connected into sub fuse board in garage. Since then the power line adapters aren't connecting, they are not getting the led to say there's an power line connection. Would solar power going back from sub fuse to main fuse board effect the power line getting a connection? Or could it be that circuit has been changed in sub fuse board when installing the solar? 
Thanks for the help