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Battery backup is useless, well, except for the one day or so every few years that your power goes out. However, the opportunity for arbitrage is most definitely alive and well in SDGE and elsewhere. The part that you have slightly incorrect, and was the part provided to you by the SDGE...

This is what I thought, it's regulations that prevent it. You're right about ability to charge from the grid because, as you state, when PV is not present and used for backup only the PW must charge from the grid. This is the reason they cannot export to the grid. Other companies have...

True that's a type of arbitrage, but how do you charge the battery at night? You cannot do this. Are you actually doing this? That means you're charging from the grid, right? My thinking is that the very reason PW can't export to the grid to actually make money from stored power is because...

Exactly. The Powerwall should technically already be able to TOU shift because all that means is storing PV-produced energy in the battery during the day and discharging it to your home at night when rates are more expensive, which will be the case in 2022 for NEM 1.0 solar customers and is...

Finally, someone has stated it correctly. There is no arbitrage with PW2 because: 1) the PW2 does not have the software capable of determining when is the best time to discharge to the grid and 2) because the utility will not allow the PW2 to discharge to the grid because it can be charged from...