Somethings missing to suupply power to the house...
Unless a proper generator bypass switch(either manual or automatic) is installed at the main service panel, you should not attempt to flow power back into the house wiring. Should the power company unexpectantly restore main power, there would be serious damage and possibly a fire. I kind of doubt that the Leaf charging power supply includes this in its base price.
Anyone have any information on installation of the Leaf charging station?