SolarEdge CTs

Five Key Checks to Ensure Correct Meter Measurements

By performing a few simple checks of the meter connections, we can verify that it is taking correct measurements prior to leaving the site. These checks are divided into:

Physical checks to ensure proper connections
Configuration checks to ensure proper communication with the meter

*Click the drop downs for troubleshoot and checks

LEDs

Physical Checks

The LEDs in the front of the meter indicate the current status.

Make sure they're blinking as shown below, otherwise you should carefully check all the steps below in order to find the fault.

Voltage connections

Physical Checks

AC side wires (meter input) - Make sure it is firmly connected to the grid connectors on the meter. Ensure the circuit breakers protect the mains terminals labeled L1, L2, and L3.

CTs

Physical Checks

Pay Attention!
It's very important to place the CT in the correct orientation, otherwise it will cause faulty readings.

Make sure there is a match between the measured phase and the connection to the correct terminal (CT on L1 of grid – to L1CT terminal of meter).
Make sure you identify the arrow, shown on the CT, and place it accordingly:
- Arrows pointing to the grid for consumption or export/import measurement.
  1. We should be getting photos of the meter 1 status showing export and import setting for L1/L2 (see below for the screenshot)
- Arrows pointing to the inverter for production measurement.
Make sure the CT black and white wires connect to the three 2-pin terminals, according to the black and white circles printed on the label and that the terminal block is fully seated into the socket.

*In case of 70A CT, make sure the label showing the CT connection direction point to the opposite side of the twisted pair cable.

Configuration settings checks

Meter function - Make sure that the meter function selected on SetApp, matches the CT installation position.
CT current rating - Make sure the CT rating configuration matches the rating on the CT label.

RS485 Wires

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Physical Checks

Make sure the RS485 G, A and B connectors of the meter are connected to the G, A and B connectors inside the inverter.
Make sure to use a shielded cable (for example CAT5e) and a twisted pair for A+B.
Termination DIP switches - If the meter device is at the end of the RS485 bus, make sure to terminate it by switching the termination DIP switches to DOWN position. The termination options are listed in the table below.
Make sure the selected port configuration matches the port to which the meter is connected (RS485-1 or RS485-2).
Make sure the wires from the meter go through the communication gland of the inverter, and that the terminal block screws are firmly tightened.

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