markd wrote:Am I correct in thinking that with the current FIT it is really only worth installing a grid tied system to cover your daytime usage.
Yes, unless you can find a very good deal somewhere, generally it doesn't make a lot of financial sense to be exporting energy and receiving a pittance for it. It is far better to maximise self-consumption, and minimise imported energy. One way to do that is to not have all your panels facing north, see: solar-wind-gear/topic5064.html
If you want to use your own energy at night or during heavy overcast weather, then you would need to install a battery. I've heard that some of the commercially available batteries are financially viable in SA now, but most are still probably too expensive to install for economic reasons.
I wonder if you installed two Electricity meters it would get around the problem?
That explanation only talked about adding storage or wind turbine to an existing installation, so I'd suspect that a new installation with a new net meter wold be fine, but you should confirm that before going ahead with anything.