TonyWilliams
Well-known member
My Toyota Rav4 does not work well with the onboard charge timer, so I want to install a timer on the Clipper Creek CS-40/50 EVSE. It has two posts for switching; one is ON/OFF, and the other is ON/6amps to be used to power the car, but not charge it (the charger is looking for 8 amps or more). The switch is either OPEN (ON) or GROUND (OFF or 6amps).
I bought an indoor light timer from Home Depot, GE 15313, "Indoor In-Wall Digital 7 Day Timer". I like that it has a simple timer override button, and no neutral wire needed (I only have 240 volt at this location, no neutral). It also has a battery back up. GE does make another similar timer for LED lights that requires a neutral.
Phil has suggested that I use the timer to switch a 120v/12v "wall wart" transformer, then use a simple 12 volt relay (like on a horn in a car) to open and close the ground contact. This would, of course, require neutral for the 120v/12v transformer. Also, I could just use a 120v relay, as lots of home appliances use these, but I would still need a neutral.
I opened up the timer, and tried (unsuccessfully) to figure out a way to unpower that switched wire, so that I can eliminate the external relay altogether:
I bought an indoor light timer from Home Depot, GE 15313, "Indoor In-Wall Digital 7 Day Timer". I like that it has a simple timer override button, and no neutral wire needed (I only have 240 volt at this location, no neutral). It also has a battery back up. GE does make another similar timer for LED lights that requires a neutral.
Phil has suggested that I use the timer to switch a 120v/12v "wall wart" transformer, then use a simple 12 volt relay (like on a horn in a car) to open and close the ground contact. This would, of course, require neutral for the 120v/12v transformer. Also, I could just use a 120v relay, as lots of home appliances use these, but I would still need a neutral.
I opened up the timer, and tried (unsuccessfully) to figure out a way to unpower that switched wire, so that I can eliminate the external relay altogether: