Category checklist · Melbourne
Solar Panel Maintenance Checklist for Melbourne Homeowners
Over 30% of Melbourne homes now have rooftop solar — but many homeowners have little visibility into whether their system is actually performing as it should. Inverter faults, panel soiling, shading changes, and system degradation can silently reduce output by 20–40% without any obvious signs. This checklist covers the four self-observations that reveal the most common performance issues.
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- 1 Check your solar inverter display or monitoring app: the inverter should show 'Normal' or 'Generating' during daylight hours on clear days. Error codes, flashing lights, or no display at all indicate a fault that is stopping or reducing generation.
- 2 Compare your electricity bills: if your grid import costs have increased year-on-year despite similar usage, your solar output may have dropped due to panel degradation, inverter issues, or new shading from vegetation growth.
- 3 If accessible from ground level, observe your solar panels for heavy soiling, bird dropping accumulation, or leaf debris — a heavily soiled panel can lose 15–30% of output.
- 4 Check whether any new structures, vegetation growth, or neighbouring construction has created new shading on panels that previously had clear sun — even one shaded panel in a string system can significantly reduce whole-string output.
Warning Signs to Look For
- Inverter showing error code or fault light
- No generation display during sunny daylight hours
- Unexpectedly high electricity bills for the season
- Monitoring app showing generation well below historical averages
- Visible cracks or discolouration on panel surface
- Inverter making unusual buzzing or clicking sounds
Cost of ignoring
A faulty inverter generating zero output for 6 months can cost $600–$1,500 in additional grid electricity that would otherwise have been self-generated. Inverter replacement costs $1,000–$3,000 — but catching faults early prevents lost energy and can extend system life. Annual system checks by a Clean Energy Council accredited installer cost $150–$300.
Frequently Asked Questions
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How often should solar panels be professionally cleaned and inspected in Melbourne?
Panels in areas with low rainfall or significant bird activity benefit from cleaning every 1–2 years. A professional inspection of the inverter, isolator switches, and wiring should occur every 2–5 years or whenever you notice a performance change.
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How long do solar panels last?
Quality panels carry 25-year performance warranties guaranteeing at least 80% of rated output at end of life. Actual degradation is typically 0.5% per year. Inverters have shorter service lives — string inverters last 10–15 years, microinverters 20–25 years.
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My solar inverter is showing a fault code — what should I do?
Note the code and contact your installer or a Clean Energy Council accredited electrician. Do not attempt to reset or open the inverter yourself — DC solar systems operate at potentially lethal voltages even when the AC breaker is off.
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