I've been slowing learning about home automation stuff and think that it is pretty straightforward to use it for this task
Toys needed:
1 CT (current transducer sensor)
1 Smart breaker
1 Hub
Overview
When the LEAF SoC reaches a thresh-hold, the car pulls ever lower currents with increasing SoC to protect the battery. Since the current draw is SoC dependent, measuring the current is similar to reading the battery SoC. Once a car owner decides the threshold current they want to stop charging, it becomes a small matter for the hub to query the CT for its current, and to direct the smart breaker to flip to off when current drops below the assigned level.
That simple, really.
My only small hesitancy here is a system that cuts off the EVSE with a brute switch. I'm sure that is fine for the occasional grid hiccough but I'm not sure it should be a daily routine. A smart EVSE that could be controlled by the Hub would be more elegant.
Toys needed:
1 CT (current transducer sensor)
1 Smart breaker
1 Hub
Overview
When the LEAF SoC reaches a thresh-hold, the car pulls ever lower currents with increasing SoC to protect the battery. Since the current draw is SoC dependent, measuring the current is similar to reading the battery SoC. Once a car owner decides the threshold current they want to stop charging, it becomes a small matter for the hub to query the CT for its current, and to direct the smart breaker to flip to off when current drops below the assigned level.
That simple, really.
My only small hesitancy here is a system that cuts off the EVSE with a brute switch. I'm sure that is fine for the occasional grid hiccough but I'm not sure it should be a daily routine. A smart EVSE that could be controlled by the Hub would be more elegant.