When I use the occasional use charger, I end up folding and putting away the charger (because I don't want the handle to drag on the ground) and forget that the flap is still open. I end up driving along until I notice it or someone honks at me. A sensor that tells you it's still open on the dash would be great. Never have the problem using the level 2 EVSE as I can put away the handle with one hand and close the flap with the other and never forget.