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7
Precautions
The optimizer uses Staubli MC4 DC connectors. Ensure that the DC connectors to be connected
are of this model. If the DC connectors to be connected are not of the Staubli MC4 model, the
connector compatibility report and third-party lab (TUV, VED, or Bureau Veritas) report from
the DC connector manufacturer must be available. Using incompatible DC connectors may
result in serious consequences. The resulting device damage is beyond the warranty scope.
Optimizers are not supported in off-grid scenarios.
Partial configuration is not allowed. All PV modules must be connected to optimizers.
Otherwise, serious consequences may occur, and the resulting device damage is not covered by
the warranty.
The information in this document is subject to change without notice. Every effort has been
made in the preparation of this document to ensure accuracy of the contents, but all
statements, information, and recommendations in this document do not constitute a
warranty of any kind, express or implied.
Only qualified and trained electrical technicians are allowed to operate the device. Operation
personnel should understand the composition and working principles of the grid-tied PV
power system and local regulations.
Carefully read this document prior to installation to get familiar with product information
and safety precautions. Huawei shall not be liable for any consequence caused by violation of
the storage, installation, and operation regulations specified in this document and the solar
inverter user manual.
Use insulated tools when installing the device. For personal safety, wear proper personal
protective equipment (PPE).
If an optimizer does not connect to any other device, connect the OUT+ and OUT– ports of
the optimizer respectively to the IN+ and IN– ports to protect the terminals from water.
It is recommended that the positive and negative cables (PV+/PV–) between the optimizer
and the solar inverter be placed side by side to avoid cable winding.
The input end of the optimizer should be connected to the PV module connection box, and
the output end to the adjacent optimizer or a solar inverter. Do not reversely connect the
input and output cables. Otherwise, the optimizer may be damaged.
The screenshots are for reference only. The actual screens may vary. For details about the
physical layout of optimizers, see the
App Quick Guide
.
MERC Smart PV Optimizer User Manual
10
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