SDM120C energy monitor https://thingspeak.com/apps/plugins/14346 https://thingspeak.com/apps/plugins/129446 https://thingspeak.com/apps/plugins/129648
Monitoring of may 1,26 kWp installation. 4x315 W Csun PERC 2x Envertech 560 SDM 120 with RS485 to TTL connect to ESP8266 with ESPEasy software