Thanks again!Sure, np. FWIW, if you use self powered mode with a reserve, you are also lessening your impact on the grid (meeting the "pull less from the grid" objective you mentioned). The only "issue" if you can call it that, is that powerwalls are only (roughly) 90% efficient, so you are losing some of the solar power by running it through the powerwalls, provided you have net metering and are allowed to export to the grid.
Your location says honolulu, and I thought I remembered Hawaii being pretty restrictive on whether you could feed back to the grid at all, so if thats the case for you (no grid export at all), then you likely want to get as much use out of your solar as possible, so that also matches self powered mode with a reserve that makes sense to you (enough to get you through the night till morning sunrise, etc).
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