Also, OP, if I were you I would ignore any "after incentive" that someone quotes you unless they are going to guarantee those incentives in writing. If you want to compare apples to apples, you need to look at it like you are shopping for a (non tesla) vehicle.
Meaning, compare the price, pre any incentives etc, then
The original post was about just a solar system so charging from the grid is not an issue but if the grid is down any GT system from any vendor would be down.
To be clear about your comment and how it would apply to a Powerwall installation, the restriction of charging from the grid is a user choice about whether one wants to take the Investment Tax Credit. Enphase, Powerwall or any hybrid inverter is able to charge from the grid.
Its not actually a user choice in tesla's case, as they dont give the user a choice. Tesla just "doesnt allow it" (except for one exception we know of, in AZ). Some of us guess that is to prevent individual homeowners from having to "prove" anything related to taking the income tax credit for installing powerwalls. Tesla also likely has a lot more scale than many of those others, so is likely going to be scrutinized more.
If it was a user choice, we wouldnt have all the threads about people "discussing" (complaining) about not being able to charge from the grid except during stormwatch mode with powerwalls.
They all see a world where they fill the powerwall with TOU "cheap" energy, then, since the powerwalls are full, push all solar to the grid (becoming an mini generation facility), and finally, running their home off the cheap energy during peak times, never paying the peak charge that the utility plan has for allowing cheap rates in the first place.
If that was the case, all NEM credits should be at wholesale rates at all times, but thats not the world they see with the above.
