Dirty panels quietly lose 5-40% of their output. What residential solar maintenance really costs in NZ, where DIY goes wrong, and what a professional clean includes.
If your business owns a solar array, there are three documents that assume you are maintaining it: the standard your system was installed under, your
Dirty solar panels lose between 5 and 40% of their output. That range is wide because soiling is wildly site dependent, and the honest answer
Most commercial solar systems in New Zealand should be cleaned every 6 to 12 months. Where your site lands in that range depends on four
Solar panel maintenance in NZ means one inspection and clean a year under AS/NZS 5033. What the 7-point check covers, the signs your system needs attention, and what it costs.
You can safely rinse accessible panels yourself with plain water and a soft brush. Where DIY stops being sensible, what a professional clean adds, and what each costs.
