Well good news and bad news. The bad news is that my charger unit was almost 4 years old, but sold as a new unit. The software (not user update-able) is out of date and doesn't recognize the remote display. Disappointing for sure. The good news is Kisae is sending me a new one. They offered to send me the new one before I send the old one back. Great service. I've had a spate of this kind of thing though - my solar controller for the bus was manufactured in March 2015, yet I bought it in Nov 2016. I guess I'm going to have to start querying for build dates.