A common question we receive is whether a solar current transformer (CT) clamp is required to optimise the use of surplus solar energy, and if so, where it should be installed. Below, we provide a clear explanation to help you understand its purpose and installation requirements.
Included CT Clamp for Grid Monitoring
All myenergi devices—zappi, eddi, and libbi—are supplied with a CT clamp as standard. This clamp is designed to monitor electricity import and export at your property. It should be installed on the meter tails (the main power cables entering your property) to allow your myenergi device to track the flow of electricity to and from the grid. This setup is essential for the proper operation of zappi, eddi, and libbi.
Additional CT Clamp for Solar Monitoring
To measure the output from your photovoltaic (PV) system, an additional CT clamp is required. This solar CT clamp should be installed around the live wire connected to the output of your PV inverter.
You have two options for connecting this CT to your system:
- Wired Connection: Directly connect the CT clamp to your zappi or eddi.
- Wireless Connection: Use a harvi wireless transmitter to simplify the installation process.
As this installation may involve accessing your PV inverter or consumer unit, we recommend engaging a qualified electrician to perform the work safely and correctly.
Is the PV CT Essential?
While the PV CT clamp is not mandatory for the operation of your zappi or eddi (which primarily rely on the grid CT for their control), it is required if you wish to monitor your PV system’s generation and usage in the myenergi app. This additional data can provide greater insight into your energy production and usage patterns.
Purchasing Additional CT Clamps
If you require an additional CT clamp for solar monitoring, these can be purchased directly from us. Click here to purchase a CT clamp.