Any experiences out there? We have a small hay shed near a field and I wanted to put a light in it so my wife does not have to retrieve hay in the dark in the winter. No electric out there. Wanted to install the charger outside and the detector and light inside away from the terrible wind here in the winter. I am getting the impression from the web that none f these units are reliable, sturdy, or last more than a few weeks. ANy thoughts?