I just got my Powerwall days ago and I have a question. I have just the one Powerwall, no solar and no EV. This is a configuration pretty much only for backup power to be used in the event of a power failure as far as I can tell. I know that works because we've already had a power failure. I would like to use the Powerwall for something other than just for backup power, if possible. I have heard that it is possible to charge the powerwall only at certain times of the day and also to use energy from the powerwall for the house at certain times of the day. I cannot find information on whether this is possible or how to do that. Is that do-able? I am in California using PGE utility and currently have tiered usage rate plan.