For reference this is what the 3kW Vector SunGenie did for us this month (16 panels on the roof and roughly a 10kW battery in the garage) :
You REALLY need a way to store the power, exporting to the grid is almost pointless now since all the electricity retailers decided together to slash the buy price, take a good look at the Tesla power wall, it's not the highest capacity system you can get but it is quite high tech and doesn't take much space.
edit. It Would help I described the picture :-)
The line is power coming in from the sun, grey is grid power being used, green is solar generated power being used (both from battery and direct from panels to house), blue is power being exported. "Solar usage" is how much power the house used that came from the sun/battery, "Solar Export" is amount of surplus power exported back to the grid, "Total Usage" is how much the house used (solar+battery+grid).
Can you gives details on your battery setup? what did you use and how much it costs? Cost effective? Life span of the battery?