Solar system inspection in Perth: when to get one and what it checks

Solar systems are long-lived installations with components that can degrade, fail, or need attention over time. A professional inspection by a licensed solar electrician or accredited assessor gives you an independent view of your system's safety, compliance, and performance. Here are the scenarios where getting an inspection makes sense.

Scenario 1: buying a property with existing solar

When you purchase a Perth home with an existing solar system, you're inheriting an asset whose condition you don't know:

• How old is it?
• Has it been maintained or serviced?
• Does it still perform to its original specification?
• Is it compliant with current Australian Standards?
• Are there safety issues?

A pre-purchase solar inspection (separate from the standard building inspection, which may not include a detailed solar assessment) should cover:

• Panel condition: delamination, cell cracking, soiling, hot spots (visible via thermal imaging on some inspections)
• Inverter condition and fault history
• Mounting and racking condition (corrosion, bracket integrity)
• Electrical compliance: cabling, isolators, DC and AC switches, safety labels
• Performance comparison: does monitoring data show expected output given system age and size?
• REBS vs DEBS status: which feed-in arrangement is the system on? (affects your electricity economics as the new owner)

Cost of a solar inspection in Perth: approximately $200–$500 depending on system size and whether thermal imaging is included.

Is it worth it? For a 6.6kW system that would cost $7,000–$9,000 to replace, a $300 inspection that identifies a failing inverter, safety issue, or underperformance is worth every dollar.

Scenario 2: storm damage

Perth experiences significant weather events — hail, strong winds (especially Fremantle Doctor exceeding 60km/h on storm days), and occasionally cyclone-origin systems tracking south.

After storm events, inspect for:

• Cracked or broken panels (visible from ground; may need roof access for detail)
• Displaced or loose mounting brackets
• Damaged wiring or cable conduits
• Water ingress around roof penetrations

Who to call: A licensed solar electrician (or CEC-accredited installer) for electrical inspection, and potentially a licensed roof plumber or roofer for the penetration and mounting assessment if structural damage is involved.

Insurance claim: Solar panels are typically covered as building fixtures under home and contents or landlord insurance. Document storm damage with photographs before any cleaning or repairs. Contact your insurer before engaging repairs.

Scenario 3: unexpected performance drop

If your monitoring app shows generation notably below what you'd expect (compared to your performance history or installer's estimate), an inspection can identify the cause:

Common causes found in Perth inspections:

• Tree growth: native WA trees grow year-round. A tree that was clear of panels at installation may be shading them now.
• Bird nesting: birds (especially corellas and pigeons in Perth suburbs) can nest under panel arrays, causing wiring damage and partial shading from nesting material
• Inverter fault: inverters operating at reduced capacity without displaying an obvious fault code
• Panel delamination or cell failure: panels that have physically degraded
• Soiling: dust, pollen, bird droppings, and lichen reducing output

Scenario 4: routine 5-year check

Some homeowners book a routine inspection every 5 years as part of their system maintenance. This is not mandatory but is worth considering for systems over 8–10 years old.

At 5 years:

• Inverter approaching mid-life; confirm it's operating correctly
• Mounting hardware: check for corrosion, particularly for coastal Perth properties within 2km of the ocean (salt air accelerates corrosion)
• Wiring: UV degradation of exposed cabling is possible over time

At 10 years:

• Inverter warranty typically expiring; condition assessment helps decide whether to replace proactively or wait for failure
• Performance warranty mid-point check: compare current generation to the warranted 80% at year 10

What an inspection includes

A thorough solar inspection by a licensed solar electrician in Perth typically includes:

Visual assessment:

• Panel condition (delamination, cell discolouration, glass integrity, frame condition)
• Mounting and racking (brackets, rails, roof penetrations)
• Conduit and cabling condition
• Inverter visual inspection

Electrical checks:

• DC isolator function and condition
• AC isolator function and condition
• Earth continuity testing
• Insulation resistance testing
• String voltage and current measurements (to identify underperforming strings)

Performance review:

• Review of monitoring data history
• Comparison against expected output for system age, size, and Perth irradiance
• Identification of any significant underperformance period

Compliance check:

• Confirms system labelling and signage meets current AS/NZS 5033 and AS 4777 requirements
• Identifies any non-compliant elements from older installations that may need rectification

Report: A written report with findings, safety ratings, and recommended actions.

Finding a solar inspector in Perth

Options:

• Contact the original installer (for service, not necessarily an independent assessment)
• An independent licensed solar electrician (search Electrical Contractors Licensing Board WA)
• A CEC-accredited inspector (the CEC doesn't have a specific "inspector" accreditation, but CEC-accredited installers are qualified to assess systems)
• Some building inspection companies now include solar as part of pre-purchase building reports — confirm the solar assessment is done by a licensed electrician

Cost guide:

• Basic inspection (visual + electrical checks): $200–$350
• Full inspection (includes thermal imaging): $350–$600
• Inspection with written report: add $50–$150 to above

Solar inspection requirements and standards are set by Australian Standards (AS/NZS 5033, AS 4777) and enforced by Western Power connection requirements. A licensed electrician inspecting solar should be familiar with both.