How often should solar panels be inspected?

Solar panels should be inspected at least once per year for commercial and industrial installations, and every two years for residential systems. However, more frequent inspections are recommended in harsh environments , coastal areas (salt corrosion), dusty or industrial sites, areas with heavy bird activity, or regions prone to hail, storms or extreme heat. Performance monitoring should be continuous where possible, so any significant drop in output triggers an unscheduled inspection. Inverter firmware updates and safety device testing should also be checked at each inspection.

What are the regulatory requirements for solar PV inspections in Australia?

Under AS/NZS 5033, solar PV systems must be installed and maintained in accordance with the standard. The Clean Energy Council recommends annual inspections for commercial systems. Many state and territory electrical safety regulations require that PV system electrical components are tested at intervals consistent with AS/NZS 3000 (Wiring Rules). Documented inspections are often a condition of manufacturer warranty and government incentive programmes such as STCs and LGCs.

What are common solar panel defects?

Common solar panel defects include: hotspots (localised overheating caused by shading, cell damage or bypass diode failure), micro-cracks (invisible cracks in cells that reduce output over time, detectable with electroluminescence imaging), delamination (separation of the encapsulant from the glass or backsheet, allowing moisture ingress), potential-induced degradation (PID, caused by voltage stress in humid conditions), snail trails (discolouration along micro-cracks), junction box failure (loose connections, water ingress), and soiling (dirt, bird droppings, lichen reducing light transmission). Mounting issues such as loose clamps, corroded rails or failed roof penetration seals are also common.

Is this solar panel inspection checklist free to download?

Yes. This solar panel inspection checklist is completely free to download and use. Open the template in your browser and print or save as PDF. No account or sign-up is required. If you want to digitise inspections with automatic scheduling, photo capture and compliance dashboards, MapTrack can help. Book a free demo to see how it works for your operation.

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Free solar panel inspection checklist (PDF-ready). Covers panels, inverters, wiring, mounting, performance and safety. Download free.

Jarrod Milford

Commercial Director

Updated 3 May 2026

Also see:Maintenance and work orders →Best CMMS software →MapTrack vs MaintainX →

Updated 3 May 2026

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What is a solar panel inspection checklist?

A solar panel inspection covers the full photovoltaic (PV) system , panels, inverter, electrical connections, mounting structure, safety devices and system performance. The panel inspection checks for physical damage (cracks, hotspots, delamination, discolouration), cleanliness (dirt, debris, bird droppings), shading from new obstructions, and secure mounting clips and clamps. The inverter check confirms normal operation, expected output, clear ventilation and current firmware. Electrical checks cover DC and AC isolators, earth fault interrupter, cable insulation, junction box seals and earthing conductors. Performance is assessed by comparing actual output against expected values for the system size and conditions.

Solar PV systems are long-lived assets with expected lifespans of 25 years or more, but degradation rates increase significantly without regular inspection and maintenance. Hotspots, delamination and inverter faults can reduce output by 10 to 30 percent before the owner notices on their electricity bill. A structured annual inspection catches these issues early, protects the warranty and ensures the system delivers the return on investment that was projected at installation. For commercial and industrial systems, documented inspections are often required by insurers and may be a condition of government incentive programmes.

From a financial perspective, solar panel performance degrades gradually, and without regular inspections the output loss goes undetected until energy bills increase noticeably. Soiling alone can reduce output by 5 to 25 percent depending on the environment. In Australia, solar installations must comply with AS/NZS 5033 and the Clean Energy Council guidelines. Maintaining documented inspection records is also a condition of many Solar Power Purchase Agreements.

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Benefits of using this solar panel inspection checklist

Maximise output: identify and resolve issues (soiling, shading, hotspots) that reduce energy generation.
Early defect detection: catch micro-cracks, delamination and inverter faults before they cause system failure.
Safety assurance: verify isolators, earthing and cable insulation to prevent electrical hazards and fire risk.
Warranty compliance: many panel and inverter warranties require regular inspections and maintenance records.
Asset protection: extend the lifespan of your solar investment by addressing issues early.
Audit trail: documented inspections provide evidence for insurers, auditors and regulatory compliance.

Benefits of digitising forms in MapTrack

When you digitise solar panel checklists in MapTrack, you get:

Field users can easily scan a QR code to complete a form on mobile. Unlimited users.
Automatically get alerts when faults are identified.
Link every form digitally as a PDF to the relevant asset, location or person.
Receive a digital PDF copy with every submission to your email.
Ability to share forms digitally.
Build conditional logic (show or hide questions based on answers).
Take pictures or attach photos. Not possible with a paper-based form.
Electronic signatures.
Edit forms later without reprinting.
Restrict permissions (who can view, complete or approve).
Build forms with AI (describe what you need and MapTrack suggests the form).
Trigger work orders automatically when a fault is logged during an inspection.
Track service intervals by hours, kilometres or calendar date in one place.
Attach supplier invoices and parts receipts to each maintenance record.

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What to include in a solar panel inspection checklist

This solar panel inspection checklist covers 7 key areas:

System details: date, site/building, system size (kW), inverter make/model, inspector, next inspection due.
Solar panels: 7 pass/fail checks covering cleanliness, cracks, delamination, frames, shading, clips and labels.
Mounting and structure: 5 pass/fail checks covering rails, roof penetrations, tilt angle, corrosion and cable management.
Inverter: 5 pass/fail checks covering operation, display, ventilation, noise/smell and firmware.
Electrical and safety: 6 pass/fail checks covering DC isolator, AC isolator, earth fault interrupter, cable insulation, junction boxes and earthing.
Performance: table comparing expected vs actual for system output (kW), daily generation (kWh), inverter efficiency (%) and string voltages (V).
Declaration and signatures: inspector and site manager sign-off.

How to use this solar panel inspection checklist

Complete the system details , site, system size, inverter make/model, inspector and next inspection due date.: Record the site address, system capacity in kW, number of panels, inverter brand and model, and the date of the previous inspection. Set the next inspection due date based on site conditions and any contractual maintenance requirements.
Inspect the solar panels visually. Check for dirt, cracks, hotspots, delamination, shading and secure mounting.: Walk the array and inspect each panel face for visible damage, soiling and discolouration. Use a thermal imaging camera if available to identify hotspots. Check for new shading from vegetation growth, new structures or antenna installations that were not present at the previous inspection.
Inspect the mounting structure , rails, roof penetrations, tilt angle, corrosion and cable management.: Check all mounting rails and clamps for corrosion, looseness or fatigue cracking. Verify roof penetration flashings are sealed and undamaged. Confirm cable management clips are secure and that no cables are resting on the roof surface or exposed to abrasion.
Check the inverter , operation, display output, ventilation, noise/smell and firmware version.: Confirm the inverter displays no fault codes and is producing output consistent with current irradiance conditions. Ensure ventilation clearance around the inverter is maintained and that air vents are not blocked by debris. Note the current firmware version and check whether an update is available from the manufacturer.
Test electrical safety devices , DC and AC isolators, earth fault interrupter, cable insulation, junction boxes and earthing.: Operate each isolator switch to confirm it opens and closes cleanly. Test the earth fault interrupter trip function. Inspect cable insulation for UV degradation or rodent damage. Check junction box seals for moisture ingress and verify the earthing conductor has continuity to the main earth point.
Record performance data , compare actual output, generation, efficiency and string voltages against expected values.: Measure and record system output in kW, daily generation in kWh, inverter efficiency percentage and individual string voltages. Compare readings against the commissioning baseline and flag any string producing more than 5 percent below expected output for further investigation.
The inspector and site manager sign to confirm the inspection is complete.: Both parties review the findings, agree on any corrective actions required and sign the declaration. Attach the completed checklist to the asset record and schedule any follow-up maintenance tasks identified during the inspection.

In MapTrack, you can schedule and track maintenance digitally. Each submission is stored as a timestamped PDF against the asset record.

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How often should you complete this checklist?

Commercial and industrial solar PV systems should be inspected at least annually. More frequent inspections (quarterly or six-monthly) are recommended for sites in harsh environments , coastal areas, dusty or industrial locations, or areas with heavy bird activity. Performance monitoring should be continuous where possible, with any significant drop in output triggering an unscheduled inspection. Cleaning frequency depends on the local environment , some sites need quarterly cleaning, others annually. Always schedule an inspection after severe weather events (hail, storms, cyclones).

The frequency of cleaning and inspection should be increased for panels installed near construction sites, agricultural areas, coastal zones or industrial facilities where soiling rates are higher. In MapTrack, calendar-based inspection schedules can be configured for each solar installation, with automatic reminders and photo documentation.

Frequently asked questions

Applicable regulatory standards

This template aligns with the following regulations and standards:

AS/NZS 5033 - Installation and Safety Requirements for Photovoltaic (PV) Arrays (design, installation and inspection of solar PV systems)
Clean Energy Council Guidelines - Best Practice Guidelines for Design, Installation and Maintenance of Solar PV Systems
WHS Regulations 2011, Chapter 4, Part 4.7 - Electrical Safety (duties for maintenance of electrical installations and equipment)

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