As a counter-example for RS-485, my solar roof's data logger consists of an RS-485 to USB converter, a Raspberry Pi and some solid-state relays. They even used

As a counter-example for RS-485, my solar roof's data logger consists of an RS-485 to USB converter, a Raspberry Pi and some solid-state relays. They even used the standard Raspberry Pi power supply, but they cut off the micro-USB and use screw terminals connected to the Pi's GPIO (probably so that customers do not have the temptation to swap it with a random phone charger they bought on eBay).