How can we help you today?

Start a new topic
Discussions OpenEVSE Forums OpenEVSE Hardware

Relay not opening when charging completes

I have replaced the Struthers Dunn contactor with a 230v relay. Power-on tests seem to work as expected, and I can charge just fine - Relay closes when I plug in, and relay opens when I disconnect the cable, as expected. However, the relay does not seem to open when the vehicle stops the charging; Ie, when I unlock the car or the vehicle is fully charged. I am 99% sure it did with the 12v Struthers Dunn contactor. My Current Measurement Transformer is not connected, but I dont think that should have any relation to relay controls? Any thoughts? Thanks, /Thomas
1 Comment

The relay will open when the vehicle commands a change from Charging State to Connected. The vehicle may leave the vehicle in Charging state when unlocking in order not to cycle the relay too many times if it is not sure the session is over. Watch the screen on the station, it will let you know the stat that is commanded by the vehicle.


If the vehicle commands to relay to open by changing state and it does not open a "Stuck Relay" error will be displayed. 

Login or Signup to post a comment
More topics in OpenEVSE Hardware
See all 226 topics