Note
Your First Planned Maintenance Visit After Handover
The annual electrical inspection gets most of the attention in a maintenance calendar. It is the one tied to a regulatory requirement. But the first scheduled visit you make to a site after handover is not the annual inspection. It comes earlier, covers different ground, and serves a purpose the inspection alone cannot.
Most contractors skip it.
What Is a Planned Maintenance Visit?
A planned maintenance visit is a proactive service call scheduled after handover, before any fault or annual inspection triggers a visit. For factory solar and LED retrofit installations, the right window is three to six months after the handover date.
Three things distinguish it from other post-handover contact:
- It is proactive, not reactive. No fault triggered it.
- It falls inside most equipment warranty periods, so installation-related findings can still be addressed under warranty.
- It is the first time you see the site under real operating conditions, not commissioning conditions.
The visit is not a full inspection. It covers what a technician can check in two to three hours. The output is a formal visit record, photographs, and any findings that need follow-up, logged in the same format used for job closes.
Why Does It Need to Happen Before the Annual Inspection?
A system commissioned in April will have its first annual inspection around April the following year. That is twelve months of operation with no scheduled contractor visit, unless someone sets one up.
Worked example: A contractor closes a 250kWp installation at a factory in Rayong in April. If no visit is scheduled, the only reason to return is a fault callback. At a planned visit in July, the technician notices heavy panel soiling near the factory’s exhaust stack. Output from those strings is lower than the rest of the array. A cleaning recommendation goes in the visit report. The facility team acts on it. Without the planned visit, the soiling runs for nine more months until the annual inspection and nobody knows.
Several things develop in the first three to six months that do not trigger alarms but do affect performance or cost:
- Panel soiling in industrial environments. Factories near exhaust sources or dusty processes accumulate particulates faster than clean rooftops. Three months of soiling can affect yield before the inverter flags anything.
- Minor installation issues. A conduit clip that was borderline on installation day may work loose during the first rainy season.
- LED driver behaviour in high-cycle zones. In areas where fittings switch many times per shift, drivers accumulate hours faster. The ones running warm at three months are often the ones that fail before the annual inspection.
- Inverter stored fault codes. Most inverters log minor events without sending an alert. A pattern visible in the logs at three months is information you cannot recover without looking.
Finding these at three to six months costs a morning. Discovering them at twelve months costs the same time, but now some findings sit outside the one-year workmanship warranty period.
What Does the Solar Visit Cover?
The focus is on the main equipment areas and what a technician can reach safely in two to three hours.
Visual and physical checks:
- Panel surface condition and soiling level across each array section, with a note on the cleaning interval appropriate for this specific factory environment
- DC combiner box connections and terminals, looking for any signs of heat at connection points
- Inverter display for any active fault codes or logged events since commissioning
- Accessible conduit and cable management runs, noting any movement or damage
Performance review:
- Pull inverter log data and compare actual daily yield against the design estimate
- Note days where output was significantly below expected, and whether the pattern suggests soiling, shade, or equipment behaviour
Before leaving, ask whether anything has changed since commissioning: new equipment connected to the main distribution, roof modifications, or changes to who manages the electrical room. Changes the customer considers routine may affect how the system operates.
What Does the LED Retrofit Visit Cover?
Physical checks:
- Lux measurements in two to three representative zones, particularly high-bay areas and any zones where the factory has changed its operational layout
- Driver operating temperature in the highest-cycle zones, by feel and indicator status
- Emergency fittings with battery backup, checked for indicator and battery status
- Any fittings that have been repositioned, replaced, or knocked by factory operations
Controls check: If the installation included zoned switching or occupancy sensors, confirm that programming still matches how the space is being used. A sensor set for a single-shift area may now run around the clock. Find this out now and update the programming before the customer notices.
What If You Find Something That May Be Under Warranty?
This is the main operational reason for timing the visit inside the warranty period.
When a finding may be warranty-covered, the action on the day is to document it, not diagnose it. Photograph it, measure it, write a description of what was observed and when. Warranty triage happens at the office, using the same process as any incoming warranty callback.
Do not wait to determine whether something is covered before creating the record. The site visit report is the evidence that the issue was identified within the warranty period. The date of the record matters later.
FAQ
When should the first planned visit be scheduled?
Schedule it three to six months after the handover date. Earlier than three months and the system has not had enough operating time to show meaningful patterns. Later than six months and some installation-related findings may sit outside the workmanship warranty period. The best time to set this date is when you write the site register entry at handover, before the file closes.
Does this visit require a formal maintenance agreement?
No, but it is easier with one. Without an agreement, confirm the basis for the visit in writing with the customer before or at handover: what is included, whether there is a charge, and when it happens. A visit not confirmed in writing is easy to defer indefinitely.
What if the customer declines a maintenance agreement but agrees to this single visit?
Schedule it and document it. A properly formatted visit report, with a clear record of what was checked and what was found, demonstrates what managed maintenance looks like. Engineers who see a concrete example are better positioned to support a formal agreement the next time it comes up.
Set the Date Before the File Closes
The first planned maintenance visit is hardest to execute when it depends on someone remembering to schedule it three months after a job closes. The right time to set the date is at job close, when the site register is written and the handover record is filed.
If the date is set at that moment, it appears in the maintenance calendar as a staffed job, not as a follow-up that depends on someone checking notes from last quarter.
For more on how site register entries connect closed jobs to scheduled maintenance, see the program page or schedule a conversation about your current handover-to-maintenance process.