What needs to be checked after replacing a solar inverter?

What you will see

• A different inverter model supplied as a replacement.
• Generation restored but backup behaviour changed.
• Old equipment still listed in monitoring.
• Uncertainty about the replacement’s warranty status.

Why it happens

DOE identifies installation verification and commissioning as part of the PV lifecycle. After replacement, appropriate checks should establish that the revised arrangement performs its intended functions.

For a manufacturer-managed replacement, the applicable process and coverage should also be confirmed. Solis’s procedure, for example, includes technical assessment and warranty verification rather than assuming every reported fault qualifies automatically.

Ask the installer to document compatibility, relevant settings, test results and updated device identification. If the replacement changes functionality, that difference should be explained before completion is accepted.

Diagram

Replacement is not finished at switch-on

1. 01Compatibility confirmed
2. 02Settings applied
3. 03Backup behaviour tested
4. 04Monitoring updated
5. 05Warranty recorded

Ask for test results and updated device identification.

What you can check yourself

• Compare the supplied model with the approved replacement scope.
• Keep the old and new serial records.
• Ask which generation, battery and backup checks were completed.
• Confirm owner monitoring access and the current device entry.
• Record any remaining limitation or follow-up work in the handover. A verbal promise is harder to assess later than a specific written item.

What not to do

• Do not assume equal kilowatts mean identical inputs, phase capability or battery compatibility. Do not reuse old settings blindly or reconnect wiring yourself to restore a missing function.

When to call us

• Request review when the replacement introduces new warnings, changes expected backup behaviour or lacks commissioning records.

Replacements in Faisalabad and Lahore

Send our Faisalabad or Lahore team old and new model details. We will verify compatibility and commissioning.

Send us

Old and new model details, the replacement scope, service report, current symptoms, and your city and area.