The JuiceBox is not yet UL rated, but is UL compliant and built with UL components and cables. It is currently in UL testing and expected to be done by summer of 2017 (possibly late spring). The UL process is winding up, although it's been a bit sluggish, we have light at the end of the tunnel.
It is also CE, NEMA, and SAE compliant, and EESS rated.
For permitting purposes, the JuiceBox is rated as a plug-in device, meaning that the subject of permitting is the NEMA plug connection.
As long as this plug (receptacle) is UL listed and installed by a licensed electrician, this is fully passable for permitting purposes.
For rebates, we recommend our ClipperCreek JuiceNet device - it is both ETL and cETL certified and compliant with all utility programs I have seen.