Hi Jayden, Thanks for the response but that did quite answer my question. When I generate surplus power in the middle of the day that AGL sells back to the grid, I realise that AGL payment me a pre-agreed tariff however what happens when the actual price is less than this tariff or even negative? AGL presumably won't be selling power at negative prices. I saw that some of the commercial scale renewable companies actually get switched off (which protects them from selling power at negative prices ...