How does 12 years required for this scheme to pay for itself stack up against the typical house battery's lifetime?
Also, as more batteries get added to the grid, the difference between the "cheap" and "expensive" energy prices ought to reduce.
Sounds like that's roughly the average usable lifetime for the battery, so you will break even on average.
Also, as more batteries get added to the grid, the difference between the "cheap" and "expensive" energy prices ought to reduce.