Hawaii (HI)
Solar panel degradation rates: what to expect in Hawaii
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.
How Hawaii's climate affects this issue
Higher operating temperatures accelerate panel degradation by approximately 20–30% compared to cooler climates.
Climate
hot humid
Sun hours
5.2 hrs/day
Soiling risk
moderate
Solar adoption
high
Related issues
Natural panel degradation
All 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%
Self-check tip:
Compare current annual production to your system's first-year output. A decline beyond 1% per year may indicate accelerated degradation.
Check your Hawaii solar system
Use our free Solar Loss Checker to estimate how much energy your system in Hawaii may be losing.
Check my systemBased on conservative solar performance modelling and published degradation data
Updated April 2026 · Structured performance modelling
How we calculate →