> Metrics from an inverter, once upon a time, would have been a local web server in the device. Or just a regular serial port! For example, IEC 62056 [0] provi

> Metrics from an inverter, once upon a time, would have been a local web server in the device. Or just a regular serial port! For example, IEC 62056 [0] provides a fairly trivial standardized way to interact with an electricity meter using an IR reader head. Even easier, the DSMR standard outputs serial data via a 5V RJ12 connector [1]. You can connect that to a PC with a $5 USB-to-serial adapter, directly to a Raspberry Pi, or to one of a dozen $20 cloud dongle thingies. Just mandate a serial interface, and the inverter itself doesn't need any kind of web interface whatsoever. [0]: https://en.wikipedia.org/wiki/IEC_62056 https://en.wikipedia.org/wiki/IEC_62056 [1]: https://jensd.be/1183/linux/read-data-from-the-belgian-digital-meter-through-the-p1-port https://jensd.be/1183/linux/read-data-from-the-belgian-digit...