Using PP line instead of external contactor for EVSE control

[wb9vxy]

I have PV and Battery from Enphase at my house. The Enphase system has several sets of pilot contacts
that can be used for load control.

Right now one contact controls a 50A contactor that feeds 240VAC to EVSE.

I have a second Tesla and need a second charger.

I am wondering if it's possible/practical/reasonable/safe to use another pilot contact to activate
a new, small signal, relay in the EVSE that opens the PP wire just like pushing the button on the handle?

Is the continuous release signal going to burn up the release in the vehicle?

What else am I missing?

Anyone come up with other ways to disable the EVSE without adding an external, full current, contactor

Thanks

WB9VXY

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[CyberGus]

Tesla wall connectors can use Group Power Management to enable multiple EVSEs to share a branch circuit without overloading it.

https://www.tesla.com/support/charging/wall-connector/power-management

 

[BrockN]

Tesla wall connectors can use Group Power Management to enable multiple EVSEs to share a branch circuit without overloading it.

https://www.tesla.com/support/charging/wall-connector/power-management

This. I've been using two chargers concurrently for 6 or 7 years. The two units communicate and split the available current if both vehicles are actively charging. When one finishes, the other gets all the current...no need to unplug the cable.

 

[mongo]

I have PV and Battery from Enphase at my house. The Enphase system has several sets of pilot contacts
that can be used for load control.

Right now one contact controls a 50A contactor that feeds 240VAC to EVSE.

I have a second Tesla and need a second charger.

I am wondering if it's possible/practical/reasonable/safe to use another pilot contact to activate
a new, small signal, relay in the EVSE that opens the PP wire just like pushing the button on the handle?

Is the continuous release signal going to burn up the release in the vehicle?

What else am I missing?

Anyone come up with other ways to disable the EVSE without adding an external, full current, contactor

Thanks

WB9VXY

Sounds like you want various load shedding based on power generation.

Opening PP is different than pressing the button.

Switching the vehicle's CP signal to +12 would theoretically be equivilent to the EVSE saying it can't source power.

https://groups.google.com/g/openevse/c/fcVLBOc6xK8?pli=1

 

[wb9vxy]

Thanks for the tip and link to the openevse group.

Both quite helpful!

Tnx

T3

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