powerwall2 behavior when paired with solar

[Ampster]

understood - what i was told is that if an installer is pairing the powerwall with solar they will set this option at install time and the user cannot undo it. that's what i'm trying to suss out.

My understanding is that the option to charge from the grid is not user configurable. The installer sets it based on whether the installation has solar, because with no solar the only option would be to charge from the grid. All my information comes from the Tesla Energy sub topic on the teslamotorsclub.com forum. You may find that a useful resource for information about Tesla Powerwalls since it is a user forum like this but tends to have mostly Powerwall and grid tie solar users. It is completely independent of Tesla Motors and some of the members who I trust I have known from some other forums. No doubt there are a lot of Tesla Fanboys on that site.

The reason for this limited option is to insure that users of a PowerWall will get the Federal Tax Credit. If the user gets audited I am sure they can point to that configuration to prove that the Powerwall could only be charged from the solar. In my case, with a hybrid inverter I took the credit but I have kept logs to prove that the batteries are charged from the grid. I had a reservation on a Powerwall but let it go because I thought I could get more flexible load shifting. I also wanted the ability to incrementally add more battery capacity at less cost than buying another Powerwall in the future.

[astroboy]

understood - what i was told is that if an installer is pairing the powerwall with solar they will set this option at install time and the user cannot undo it. that's what i'm trying to suss out.

[blueman2]

i've been told on another forum that if your powerwall2 is configured to interoperate with solar, then it is impossible for the PW2 to charge from the grid. not sure if this is a software restriction or somehow physically impossible.

for any PW2+solar owners, is this true? the tesla website implies that it is not, but websites do lie...

I believe there is an OPTION to only have powerwall 2 charge from grid, but this was just an option. The reason this option is needed is that IF your battery charges 100% from solar, then you can get the 30% federal tax credit. If it charges from the grid, then no federal solar tax credit.

[astroboy]

i've been told on another forum that if your powerwall2 is configured to interoperate with solar, then it is impossible for the PW2 to charge from the grid. not sure if this is a software restriction or somehow physically impossible.

for any PW2+solar owners, is this true? the tesla website implies that it is not, but websites do lie...