Panel Lifespan
Most solar panels carry a 30-year warranty guaranteeing at least 80% of original output. In practice, panels continue producing electricity well beyond 25 years — the degradation rate is just 0.3-0.5% per year.
Inverter and Battery Lifespan
String inverters typically last 10-15 years and may need replacing once during your panels' lifetime (£800-£1,200). Hybrid inverters with battery integration last 10-12 years. Batteries carry 10-year warranties with 5,000-6,000 cycle ratings.
Maintenance Requirements
Solar panels need very little maintenance. An annual visual check, occasional rain-wash (or manual clean every 2-3 years), and monitoring system output is usually sufficient. No moving parts means very little can go wrong.
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