You really don&#x27;t want to use DC for distribution in your home. Go price out telcoflex copper cabling (from 0000 up to 4 gauge) for -48VDC datacenter use. Voltage drop over distance and losses to heat make it impractical in homes. You really want to pay the extra money to wire your home with 6AWG cable in the walls? That&#x27;s a lot of copper.<p>Centralizing an AC to DC transformer is pointless for consumer stuff since things run on DIFFERENT voltages. A lot of consumer grade stuff is 5VDC internally. Or 12VDC. Or 17.5VDC.  Or 19.2VDC laptops. Or 24VDC. Or 48VDC.<p>That&#x27;s before we even get into the problem of &quot;everything in the world is already standardized to run from 110-240VAC 50&#x2F;60Hz&quot;.<p>If you really want to do DC distribution in your home, do it with 802.3af&#x2F;802.3at switches (or &quot;dumb&quot; midspan injectors&quot;) and cat5e&#x2F;cat6 cable. You can get LED lightings and other things that will run off PoE voltages and amperages now.