Why getting message "Check Charge System"
 

I have a 2013 Accord LX and I started getting a message from the maintenance minder system saying "Check Charge System" I had the system checked and the guy said both the battery and alternator were good. If I push the re-set button it goes away but comes back when car is started again. Any ideas what could be wrong? Last Tuesday I drove the car and stopped and restarted several times and the message didn't appear, I thought maybe it fixed itself, then Wednesday on the way to work it came up again.