Ways for consumers to put the 'sun tax' in the shade

For those with solar panels who can afford it, adding a battery could beat the "sun tax". (Lukas Coch/AAP PHOTOS)

For those who can afford it, adding a battery could beat the "sun tax" that will further deplete the once-generous rate of return for rooftop solar pioneers.

A third of Australia's households have rooftop solar and almost three quarters of the output has historically been exported into the electricity grid.