Many solar cell installations use maximum power point trackers with an internal high voltage DC bus - you could presumably tap that and distribute it directly t

Many solar cell installations use maximum power point trackers with an internal high voltage DC bus - you could presumably tap that and distribute it directly throughout the house (often it's also directly attached to lead-acid battery banks, if used). In fact, you can often take ~170VDC and directly power many passive PFC power supplies with it. You still need inverters for AC motors though, which are a big portion of the load (compressors, fans).