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8 Troubleshooting
Following are common problems with the meter when used with inverters. When a
problem occurs, check the questions below for possible reasons and solutions. For further
assistance, contact SolaX after-sales Service.
01 What if the inverter LCD or SolaXCloud reports a MeterFault alarm when the meter
is connected to and enabled on the inverter?
The inverter reports a MeterFault alarm when it fails to communicate with the meter.
Please follow the steps to troubleshoot:
Step 1: Check the wiring of the meter and inverter based on the wiring diagrams. Make
sure terminal 24 and 25 of the meter are respectively connected to RS485
terminal A and B of the inverter. For pin definition of different inverter models, see
“Compatible Inverters and Pin Definition” and the user manual of the inverter.
Step 2: Check whether the meter settings meet the requirements of the inverter.
Generally, for communication with SolaX inverters, the meter address should be
set to 001, with a baud rate of 9600, none parity and 1 stop bit. These settings are
default to the meter. If the current meter settings are not correct, see “Setting the
communication address and baud rate” to modify them.
Step 3: Contact the distributor or SolaX technical support.
02 What if the meter readings, such as power, do not match the actual situation?
Abnormal meter reading might result from incorrect wiring, improper CT connection,
inconsistent parameter settings and more of the meter.
Following are common problems with abnormal meter readings and methods to fix them.
For other situations, contact the distributor or SolaX after-sales service.
• The power reading of a phase is opposite to the actual power flow. For example,
the actual power flow is importing 2 kWh, but the reading is exporting 2 kWh.
In this case, check whether the CT direction and wiring of S1 and S2 are correct.
The CT must point away from the grid to the inverter or load. S1 and S2 wire
of the CT must be connected to the input and output terminal of the meter
respectively.
• The reading is proportionally larger or smaller than the actual value. For
example, the actual export power is 2 kWh, but the reading is 1 kWh.
In this case, check whether the current ratio set on the meter corresponds to the
CT specification. If not, see “Setting the transformer current and voltage ratio” to
reset it.
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