SMA · inverter
SMA — natural panel degradation
While degradation primarily affects panels, SMA inverters also lose efficiency over time. With a typical lifespan of 15 years, efficiency loss becomes measurable after 5–7 years of continuous operation.
Natural panel degradation is a known issue for SMA inverters. This doesn't mean it will affect your system — but it's worth monitoring.
Natural panel degradation details
All solar panels lose efficiency over time at roughly 0.5–0.8% per year. Accelerated in extreme heat or poorly manufactured panels.
Self-check tip:
Compare current annual production to your system's first-year output. A decline beyond 1% per year may indicate accelerated degradation.
Brand lifespan
15 years
Warranty
10 years
Check your SMA system
Use our free Solar Loss Checker to estimate how much energy your SMA system may be losing.
Check my systemBased on conservative solar performance modelling and published degradation data
Updated April 2026 · Structured performance modelling
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