Old homes would benefit from better load management technology. I want to clip something like this (http://www.theenergydetective.com/homemtuct200.html) to my main feed, and have it send power measurements to an EV charger, which automatically adjusts to fill all remaining capacity.
This wouldn't require any Internet access, just data sent over the power line, to a charger that's able to listen.
Existing home wiring could also be repurposed to carry HVDC, and therefore more power (12A * 600V = 7.2kW)... but I'm not sure if HVDC cars are designed with low current in mind.
ClipperCreek sells EV chargers with a UART interface to set the charging rate (in 25% increments), so it should be relatively straightforward to stuff a Raspberry Pi or something in there.
But that option costs an extra $184, and the UART protocol is only available under NDA, which probably makes it difficult to open source.
The J1772 spec is well documented and supports the "advertisement" of maximum charging current. You could add the capability to something like OpenEVSE. https://www.openevse.com/
At the moment, I'm pretty sure I have enough panel capacity for a plain old EVSE, but if I do need something controllable, then OpenEVSE looks really interesting. Thanks.
Here's an example of OpenEVSE tracking solar capacity, which is basically equivalent to panel load management:
This wouldn't require any Internet access, just data sent over the power line, to a charger that's able to listen.
Existing home wiring could also be repurposed to carry HVDC, and therefore more power (12A * 600V = 7.2kW)... but I'm not sure if HVDC cars are designed with low current in mind.