Thought I'd share my experience today in the hope it might help some other forum members!
Today I had my 3-phase digital electricity meter, Off-Peak HW meter, and Solar Gross Feed-In meter replaced.
AGL finally (have been waiting since Jan4) came to install the 2 new Smart meters. One for 3phase/Solar and the other for Off-Peak Hotwater.
Fortunately I arranged to be home and I had a great Electrician (older chap!)
As I use CurrentCost electricity monitoring guages, I asked the Sparky how he plans on wiring up the new 3phase Meter and Solar Net Feed In.
He explained that my 3phase Daikin AC is spread across all 3 phases, and the Solar NET FEED IN will only off-set a single phase.
After learning this, I asked him to put my Powerpoints and Stove Top on Phase A,
Phase B did the Lights
Phase C did the Oven.
AC is tapped across all 3 phases. which means on the humid days, I wont get to completely offset my AC usage with my SOLAR!
As such I had the Solar Net Feed In connected to Phase A, since it is always in use.
My lesson learnt today is: If you have 3phase power and Solar, make sure you connect it to your powerpoints and stovetop phase.
If you dont, then you may still end up feeding the bulk of your Solar generation back to the Grid for 6c, whilst paying 27c for your other 2 "more actively used' phases.
This link may explain it better than i did!
http://reneweconomy.com.au/3-phase-tric ... lds-17282/
Future plans to counter this is: add More Solar and use Micro Inverters to spread across the other phases.
And more panels facing afternoon sun when there is more power usage.
Or revert to a Single Phase and eliminate the risk entirely! (very unlikely)