Most Australian solar panels carry 25-year performance warranties promising a high fraction of original output — not a cliff-edge death on the anniversary. Inverters, isolators and roof flashings often need attention sooner. This guide explains degradation, reuse and recycling pathways, upgrade economics in a 2026 rebate world, and how to plan the next decade with CEC-accredited advice via MrSolar.
Tell us about your home. We'll match you with 3 local installers.
Indicative 2026 pricing: a typical 6.6kW system often quotes around $5,000–$8,000 after the STC discount (metro installs often $5,000–$7,500; premium/regional can run higher). See our solar cost guide.
Free for homeowners. Participating installers pay MrSolar a lead fee when matched — that does not buy a higher ranking in our guides or reviews. See how we match quotes and is MrSolar legit?
Quality modules typically lose a fraction of a percent of output each year under warranty schedules, with a larger first-year light-induced drop on some technologies. A well-installed array at year 25 may still produce the majority of its original power. Heat, shade, micro-cracks and poor ventilation accelerate losses. Monitoring specific yield beats guessing from the calendar alone. Keep decisions grounded in your interval data, roof constraints and written DNSP settings rather than national averages or salesperson screenshots. Save PDFs of every plan, approval and datasheet — warranty claims years later depend on that trail. Keep decisions grounded in your interval data, roof constraints and written DNSP settings rather than national averages or salesperson screenshots. Photograph your switchboard and roof planes before quoting day to cut variation risk.
Inverters commonly show age before panels. DC isolators, optimisers and roof penetrations are frequent service items in Australian conditions. If generation collapses suddenly on a sunny Sydney or Perth day, look for electrical faults before assuming “panels died of old age”. Keep serial numbers and warranty contacts accessible. Keep decisions grounded in your interval data, roof constraints and written DNSP settings rather than national averages or salesperson screenshots. Photograph your switchboard and roof planes before quoting day to cut variation risk. Keep decisions grounded in your interval data, roof constraints and written DNSP settings rather than national averages or salesperson screenshots. Save PDFs of every plan, approval and datasheet — warranty claims years later depend on that trail.
At 15–25 years many homes reconsider hybrid inverters and batteries because tariffs and export limits have changed. The Cheaper Home Batteries Program (~$372/kWh usable since 1 July 2025) can tip storage economics. Adding new high-wattage modules beside aged strings needs careful design to avoid mismatch. Sometimes a full refresh with modern STCs on eligible new capacity is cleaner — confirm certificate rules before assuming a full residential discount returns. Keep decisions grounded in your interval data, roof constraints and written DNSP settings rather than national averages or salesperson screenshots. Save PDFs of every plan, approval and datasheet — warranty claims years later depend on that trail.
Australia’s PV recycling capacity is growing but is not yet a casual kerbside service everywhere. Ask installers how they dispose of removed modules and frames. Reuse on sheds can be tempting but may clash with insurance and electrical standards if not done properly. Budget end-of-life handling into upgrade quotes instead of discovering it on install day. Keep decisions grounded in your interval data, roof constraints and written DNSP settings rather than national averages or salesperson screenshots. Photograph your switchboard and roof planes before quoting day to cut variation risk. Keep decisions grounded in your interval data, roof constraints and written DNSP settings rather than national averages or salesperson screenshots. Save PDFs of every plan, approval and datasheet — warranty claims years later depend on that trail.
A 25-year array on a 5-years-left tin roof is a false saving. Coordinate reroofing with panel removal and reinstall. Flashings and rail footprints need inspection during any major service. Water ingress blamed on “solar” is sometimes aged roofing that solar merely revealed. A site assessment with photos, stringing plan and shade notes beats brochure layouts; mismatched orientations need separate MPPTs or module-level electronics. Save PDFs of every plan, approval and datasheet — warranty claims years later depend on that trail. A site assessment with photos, stringing plan and shade notes beats brochure layouts; mismatched orientations need separate MPPTs or module-level electronics. Photograph your switchboard and roof planes before quoting day to cut variation risk.
Use generation history to size the next system for today’s EV and heat-pump loads. Compare three CEC-accredited upgrade quotes via MrSolar. Require degradation evidence, disposal plans and STC assumptions with as-of dates. The best year-25 decision is documented, not nostalgic. Keep decisions grounded in your interval data, roof constraints and written DNSP settings rather than national averages or salesperson screenshots. Photograph your switchboard and roof planes before quoting day to cut variation risk. Keep decisions grounded in your interval data, roof constraints and written DNSP settings rather than national averages or salesperson screenshots. Save PDFs of every plan, approval and datasheet — warranty claims years later depend on that trail.
Planning a second-generation solar system? Compare CEC-accredited upgrade quotes on MrSolar.
Written and reviewed by Daniel (Marketplace lead, Epic Unicorn Pty Ltd). We build pages from Australian solar datasets and regulatory references, then map you to CEC-accredited installers only.
Join over 230,000 Australian homeowners who've used MrSolar to find their installer. No obligation, no spam — just competitive quotes from CEC-accredited professionals.
Get My Free Quotes →Takes 2 minutes. Free forever. CEC-accredited installers only.