I asked my electricity retailer to fit an import-export meter, they did so without a quibble, 2 months before the solar was connected. Cost me $600 for a 3-phase one. The meter reader just entered the extra reading and my credits appeared as soon as it all got connected.
The grid connected tracker (1560W):
The 12V tracker:
After topping off my batteries the 12V system runs a small grid-connect inverter that feeds up to 150W back to the grid as well.



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