I've noticed this error twice when using public J1772 chargers with the CAN JR on my 2.0 Roadster. "Line Voltage Lost Sync" I'm realizing it may have been the same Eaton charger in both locations. It seems to happen when the Roadster is nearly fully charged. Restarting charging seems to work for a while, then trips it again. Is this normal? Do I need a firmware upgrade to improve charging? I'm not sure what firmware I have. I should check that. Here are the locations: Village Green | Pinehurst, NC | Electric Car Charging Station | PlugShare Chapel Hill Visitors Bureau | Chapel Hill, NC | Electric Car Charging Station | PlugShare Thanks, Jon P.S. The CAN SR is working great. I'm using it nearly every day to charge the Roadster with the Model S UMC. It's a great combination that saves a lot of trunk space.