https://openenergymonitor.org/

http://www.theowl.com/

http://efergy.com/es/

http://www.efimarket.com/medicion-electricidad

https://www.monsolar.com/ahorro-energetico/monitores-de-consumo.html

http://www.electronicaembajadores.com/Productos/Detalle/14/ed61003/contador-medidor-de-energia-base-schucko-inalambrico

http://www.electronicaembajadores.com/Productos/Detalle/14/ed61005/contador-medidor-de-energia-base-schucko-conexion-lan

http://www.electronicaembajadores.com/Productos/Detalle/14/ed61004/contador-medidor-de-energia-base-schucko-conexion-usb

====== Current Cost ======
Enchufe 34€

https://www.monsolar.com/esi-enchufe-sensor-inalambrico-para-monitor-envir.html

Base 82€

https://www.amazon.es/EnviR-energ%C3%ADa-dom%C3%A9stica-inal%C3%A1mbrica-transmisor/dp/B0054OA4MQ/ref=sr_1_1