Seeing you stated that you have clear access to your meter box, have you checked to see that your Solar is actually working.
A friend of mine had an older system and in the event of power failure you had to start the system again manually.
This is a very good reason as to why people should switch to smart meters. You can see on the App or on your MyAccount Web page your daily usage and generation.
Most inverters also have a web page and you can log onto this and see live information about your Inverter.
I suggest that you go to the inverter (During day light, when the sun is illuminating the Solar Panels) and look at the display and check that it is indeed generating electricity.
Another method is to check the meter box and if you have two meters, that the Solar Meter is turning during daylight hours, just remember though, the meter may not be turning due to the fact that you are consuming the solar power that you are generating at that time.
I would also suggest that while you are at your meter box, check that you do not have any dropped circuit breakers and reset them if so.
Next to your inverter is normally the procedure to shut down and restart your Solar System, must be which of course must be done whilst the Sun is illuminating your solar panels and carried out in the correct order.
Now your retailer (AGL in this case) is not responsible for the correct operation of your solar system. If you are not sure or feel unsafe doing any of the above, you can ask a neighbour, friend, family or engage an electrician to assist in resolving electrical issues
If this solves your issue please solve this post and also take the time to show your appreciation of my reply by clicking the Like button.