Australia · New South Wales (NSW)
Solar panel degradation rates: what to expect in New South Wales
All solar panels degrade over time — it's unavoidable physics. The question isn't whether your panels are degrading, but whether they're degrading faster than expected. Published research shows median degradation rates of 0.5–0.8% per year, but real-world rates vary significantly by climate, panel quality, and installation conditions.
New South Wales has a temperate climate with 5.2 peak sun hours per day.
Related issues
Natural panel degradation
commonAll solar panels lose efficiency over time at roughly 0.5–0.8% per year. Accelerated in extreme heat or poorly manufactured panels.
Typical loss: 3–15%
Check your New South Wales system
Use our free Solar Loss Checker to get a personalised diagnosis.
Check my systemBased on conservative solar performance modelling and published degradation data
Updated April 2026 · Structured performance modelling
How we calculate →