This is something I posted on Whirlpool, but I'll post it here too. I've been trying to fathom the rationale for Tesla's TOU modes of operation. Powerwall Modes of Operation with Solar "It can save energy capacity to charge from a higher priority source later in the day." Given that the only sources are solar and grid, does this make any sense? Any solar that's not used now either for charging or for consumption has to be exported. In the absence of variable solar export tariffs based on time of day (which the Powerwall doesn't know about anyway), is there any conceivable benefit to be had from exporting solar now, so as to leave room for charging from solar later.