Just want to address one common misunderstanding that I see a lot on this site - in NSW 5kW is NOT the maximum which can be attached to the grid on single phase.
It is in fact quite trivial to obtain approval for 10kW on a single phase (30kW on 3-phase).
I know this as I just helped a mate set up exactly that. 13.2kW of Jinko Black PV, & 2 x Zeversolar Zeverlution 5,000s, all feeding a single phase 100A service. No limiting device required.
And all this for less than $8k from Captain Green who did a great job!
If you want to verify, check out page https://www.ausgrid.com.au/Connections/Apply-for-a-connection/Application-forms-and-guides
The guide for NECF05 specifically states:
We are currently improving our forms for connecting micro embedded generation. While this is progressing, please submit the NECF05 form for systems up to 10 kilowatts per phase or compliant systems under 30 kilowatts. Please refer to NS194A for more information on eligible systems.
And in the reference document NS194A. This states specifically:
Ausgrid will approve the low voltage connection of an IES to a premises connection point provided that the total rated inverter nameplate rating is no greater than 10kVA (@230v). This requirement is also applicable if there is an existing multiphase supply to the premises.