PowaCloud is a cloud based Distributed Energy Resource(DER) management platform.
On PowaCloud you will see the historical yield performance of your solar system as well as the daily yeild and your energy consumption curves.
It gives you a great view about how your system is performaning and how you are using the energy as a comsumer.
When the Green Line is negative, meaning you are exporting your solar generation to the grid - you are 'selling' energy back to your Retailer (AGL, Origin, Energy Australia. etc.)