I got the impression there is one place for medium voltage DC in the home. Solar panels have inverters to make AC from DC, and batteries also need to convert DC

I got the impression there is one place for medium voltage DC in the home. Solar panels have inverters to make AC from DC, and batteries also need to convert DC to AC. It would be more efficient if the solar panels and batteries were connected directly with DC, and if there was a single, efficient inverter. It makes the most sense to use the battery DC voltage, and then solar panels have variable DC converter. It would make sense for off-grid home to distribute DC. DC appliances could be more efficient but they don't exist. Everyone will use inverter and AC wiring.