Installation Guidelines for harvi

Note: harvi must be installed indoors, in a location that complies with the required environmental limits.

Before installation, ensure the area is dry and does not exceed:

Relative humidity of 95%
Temperatures below -30°C or above +50°C
Altitude of 2000 metres

Installation Steps

Select a suitable wall-mount location for harvi. It should be easily accessible for maintenance and within signal range of the myenergi master device.
harvi supports up to three CT inputs. Multiple harvi units can be used on the same site if required.
Clip the CT clamp securely around the live conductor to be monitored. The arrow on the CT must point in the direction of normal current flow (typically towards the consumer unit).
For single-phase systems, it is acceptable to use the neutral conductor, provided the direction is reversed.
Feed the CT cable through the top opening on the back of harvi. Push it down firmly to lock into the integrated cable grip.
Connect the CT wires to the terminals inside harvi: red to the positive (+) terminal and black to the negative (−) terminal.
Reattach the back enclosure securely to protect internal connections.
Ensure the monitored circuit is energised. The status LED on harvi will begin flashing green within two minutes to indicate normal operation.

Warning: Only CT clamps supplied with myenergi devices (eddi, zappi, or libbi) must be used with harvi.

Wireless Signal Considerations

harvi does not use Wi-Fi. It communicates via a proprietary low-power wireless signal operating at 868 MHz (or 915 MHz in some regions). This ensures reliable transmission but also means installation range and interference must be considered.

harvi must always be paired to the master device in the myenergi eco-system (the load controller, typically the device wired to the main grid supply). It will not communicate with secondary or follower units.

Note: Ensure harvi is within 25 to 30 metres of the master device. Signal quality may be reduced by certain obstacles or materials.

Reinforced concrete walls or floors
Large metallic surfaces such as switchboxes, shelving, or roller doors
Other nearby devices operating on similar frequencies (868 / 915 MHz)

Note: For optimum performance, perform a signal quality check during commissioning. Relocate the harvi if pairing or data transmission fails.