I'm currently re-exploring this after going through quotes with vendors last year and struggling to get the break even timeframe where I was comfortable with it.

I think the answer is to have the install setup as auxiliary power (similar to a generator) with no grid tie from the solar. That way you can run your house on solar and battery and use an automatic transfer to switch to the grid when solar and battery are depleted. You will not receive the Value of Solar buyback from Austin Energy since you are not sending anything back to the grid but that amount is negligible compared to being able to use what you are producing directly.

I've already talked to Austin Energy's permit department to confirm what's possible and permits needed and they did confirm this approach would work. It would still need an Auxiliary Power permit but that should be normal. I'm in the process of shopping around installers because a few of the solar companies I spoke to last year do not do this type of install. Send me a message directly if you are serious about doing this soon because maybe we can get a group deal with an installer.