[Paul_Moxhay]

There is a few devices available, one called EMMA and one called ImmerSun, that track your export state and if you are exporting it will redirect your surplus power, that you would have exported, to other devices such as an immersion water heater.

I am looking at the Immersun at the moment as a possible way to automatically divert surplus solar power that would have been exported to the EV charge pod. The device will do it but the issue is whether the car will cope with a reduced current. Not only that but the current would vary from second to second as the house load varies and as the solar generation varied. It could even switch off altogether and then come back on in a very short timeframe and at a very low current (equiv of 50W).

It is an interesting concept but I suspect that either the car or the EVSE won't like than kind of varying supply.

 

[Paul_Moxhay]

Dumping to batteries is a very expensive and it might not even be easy to do given the very strict G83 requirements in the UK. When smart meters are commonplace and there are the safety protocols in place to prevent a backfeed into the grid should the grid be down then I can see it working.

Don't get me wrong... those smart meters will be coming but I suspect that EV integration won't be included in the first wave.

 

[Paul_Moxhay]

Yes, being totally off-grid is not so difficult or expensive. There is no G83 requirements.

I would love to be off-grid completely. It won't happen as I live in the middle of a housing estate with a small garden and no land but where I lived before we were complete out in the sticks, no footpaths and only recently got a mains gas supply. I have a bit of land there too so I could have had a pretty decent solar/wind set up. Ah... all in the past now but glad to be living where I am.