Harvi

Harvi is a device that enables the Zappi and Eddi products to be installed without using a wired current transformer (CT) for measuring the grid or generation power. 

Instead the CT is connected to the Harvi. No power source is needed for Harvi – the energy from the CT is harvested and used to transmit the measurement signal to the Zappi or Eddi. This means batteries or electrical wiring are not required.