I say "Off Grid" in quotation marks because the garage itself is very much on the grid. The only thing that is capable of operating independent of grid power are a few lights in the ceiling of the garage. Even so, the battery pack comes with a wall adapter charger that I have used from time to time to keep it charged up.
One of the great things about this installation is that it is hard wired and fully integrated with the garage. The lights look just like conventional ones that would be installed in your home. All of the wiring is concealed behind the interior sheathing with the exception of the battery pack and a little bit of PVC conduit. If this installation was done as new construction instead of a retrofit I could have easily done without the conduit.