I'm not sure when things went wrong, but changes to the Powerwall firmware seem to have broken Time Based Control, because it's now based on a utility rate plan that one cannot avoid using, Previously, it would neither charge nor discharge during off-peak times.
Now if I give it a low price for off peak grid energy, it charges the battery during off peak, and leaves no room to store the energy from the solar panels the next day, which is exported instead, at a net loss since I get less for export than off-peak costs.
If I give it a high price for off peak grid energy, it won't use the grid to power the house during off-peak and instead discharges the battery. I have previously done calculations that indicate that using the battery during off-peak is not cost effective because the cost of the resulting reduction in battery outweighs the cost of the off-peak energy.
There is an advanced setting that would allow me to disable grid charging, but Tesla Customer Support tells me that this is not yet available in my area (Australia).
Perhaps someone knows a way to fudge this in the mean time?
As always, it's really frustrating when Tesla breaks something that was previously working, and we, the owners, have absolutely no say in it.
Now if I give it a low price for off peak grid energy, it charges the battery during off peak, and leaves no room to store the energy from the solar panels the next day, which is exported instead, at a net loss since I get less for export than off-peak costs.
If I give it a high price for off peak grid energy, it won't use the grid to power the house during off-peak and instead discharges the battery. I have previously done calculations that indicate that using the battery during off-peak is not cost effective because the cost of the resulting reduction in battery outweighs the cost of the off-peak energy.
There is an advanced setting that would allow me to disable grid charging, but Tesla Customer Support tells me that this is not yet available in my area (Australia).
Perhaps someone knows a way to fudge this in the mean time?
As always, it's really frustrating when Tesla breaks something that was previously working, and we, the owners, have absolutely no say in it.