The J1772 socket on the side of your car is just a input socket to the onboard charger. You're not going to be able to extract any energy out of the car.
Forget about powering your house of feeding the grid from your EV.
The $10,000 battery in your EV and its limited cycle life is much better of being used to turn the wheels of your car and save you burning petrol than saving your a few cents on your power bill.
Any device you could have custom made to some how tap into your car's traction pack would require a custom built inverter and interface electronics that could speak to the car and allow it to happen. A one off design of somthing like this would most likely cost several times more than the purchase price of the car.
honestly it would be less expensive to drive the car onto a set off rollers coupled to a electric generator motor and put the car in cruise control at 80kmh and extract the power out that way
A much better choice would be to purchase a dedicated Solar Hybrid - On Grid Inverter with Battery Backup. Something like the selectronics SP pro.
Even better would be to feed it into the grid during daylight hours. (My solar panels don't feed-in much over winter!) 10kWh feed-in = $6.80. Net income = $4.50 per day.
I think you will find that the contract you have for your feed in tariff is locked into your PV system. This generous feed in tariff was introduced to encourage people to install PV systems and not designed so people could take advantage of it in other ways.
Can I get some sort of control box that limits the current output from the AC socket on the car?
There is no (current output ) AC socket on the car. Or were you asking if there is a way to limit how fast the car charges (how much current it draws from the wall socket)? If so then yes the EVSE basicaly the charging cord that plugs into the car has a box inline with the cord. Inside this box is some electronics that speak to the cars onboard charger and tell it what charge current to consume. The factory EVSE has been programed in AU to consume just under 10A - about 2200w. Even though the onboard charger can charge up to 3300w. You can purchase aftermarket EVSE cords that have selectable charge rates 6 - 13A roughly ( 1400w - 3200w) in 1 amp increments. So you could set it to charge at say 7 amps or whatever you like.
They are not cheap around $1000 for a cpipleat new EVSE or about 1/2 that if you send them your factory evse cord and they upgrade it to have the adjustable features.
http://evseupgrade.com/?main_page=product_info&cPath=3&products_id=8Kurt