@mike - how do you think they would feel about TOU arbitraging with batteries with this plan? Once you start to create very large TOU deltas that can become economically attractive, especially if you are inclined to buy a battery for backup when the grid is down.
I don't think this would be a problem.
The LDC's revenue is generated from the Delivery charges (currently partially fixed and partially volumetric), which are not time-specific so it doesn't matter when power is consumed from a revenue point of view. Further, the OEB has directed LDCs to move to fully fixed Delivery Charges over the next few years anyway. Aside from that, the LDC would probably appreciate you drawing power from the local grid at off-peak times to help alleviate strain on local infrastructure.
The only downside I can see, and its a big one, is local congestion if everyone starts charging Powerwalls (and EVs) at the same time in the same neighborhood. Smart scheduled charging systems are already being investigated for EVs, and if home batteries also become ubiquitous, some sort of scheduling may be needed there too. It could push the local grid "peak period" into these evening hours.
It's also good from a provincial generation point of view. Don't need those expensive gas peaker plants spooling up as often if loads can be shifted and the demand curve flattened out.
I actually already arbitrage (although I'm not really "selling" back) myself. My electric water heater runs only during off-peak and then I use the hot water throughout the day. In summer, I "pre-cool" my house by setting the a/c lower in the early morning hours, then I "coast" through the day and the compressor doesn't usually need to come on until after 7:00 pm (sometimes after 5:00 pm - mid-peak) weekdays. And, of course, I charge my car during off-peak periods and drive it during on-peak periods. My utility bill usually shows my consumption at about 80-85% Off Peak with the balance Mid and On-Peak. So I have two "thermal batteries" and one "conventional" one!
Now, I suppose if
everyone started doing this, the provincial peak periods may shift, but that would just mean that price models would have to be adjusted to reflect any new reality.