Solar systems are low-maintenance compared to most home systems, but “low” isn’t “none” – a few simple checks protect your investment and catch problems before they cost you performance.
What actually needs attention
Panels lose efficiency as dust, pollen and bird droppings build up – a periodic clean, especially before summer’s peak generation months, matters more than most homeowners realise. Inverter displays or apps should be checked periodically for error codes or unusual output drops. Battery terminals and connections benefit from an annual visual inspection.
Signs your system needs professional attention
A sudden, unexplained drop in generation, an inverter that shows persistent error codes, or a battery that no longer holds charge the way it used to are all signs it’s time for a proper inspection rather than waiting it out.
Warranty and monitoring
Most panels carry 10-25 year performance warranties and inverters shorter warranties, typically 5-10 years – keep your installation paperwork, since warranty claims usually need proof of professional installation and commissioning date.
Frequently asked questions
How often should solar panels be cleaned?
Twice a year is reasonable for most Cape Town homes, more often if you’re near dusty roads or under trees.
What’s a normal drop in solar output over time?
A gradual 0.5-1% annual decline is normal panel degradation. A sudden, sharp drop is not, and points to a fault worth investigating.
Noticing reduced performance from your system? Get a free assessment.