These days if you order Tesla solar panels and Powerwall+, is the inverter that sits above the Powerwall the only inverter now? I know Tesla had released their own inverter in Jan this year... is that a thing of the past now? If that is the case, how many other "boxes" are involved with an installation besides what you see on the Powerwall+ (combiner boxes, shutoff boxes, etc?). Also, if I only get a small solar system, it's paired with the 7.6kW inverter on the Powerwall+, right? Is that not ideal since the inverter is oversized for the solar system? Is the box that needs to connect to your router still required?