The short answer
Do not aim an exposed high-pressure jet at solar glass, seals or electrical components. Sunflow’s pressure-washer unit instead supplies controlled water through a purpose-built Kärcher solar-cleaning lance and non-abrasive brush, with no walking on panels.
Key takeaways
- Do not aim high-pressure water at solar modules or electrical components.
- Never walk on panels to reach difficult areas.
- Avoid abrasive pads and harsh household chemicals.
- Follow the panel manufacturer’s maintenance guidance.
Why pressure is not the same as effective cleaning
The goal is to remove dirt without forcing water where it should not go. More pressure does not necessarily remove baked bird mess, sticky pollen or coastal film safely. A controlled, non-abrasive process is the better approach.
Consider the whole installation
A solar array includes more than glass. Frames, seals, mounting hardware, roof penetrations, cabling and nearby electrical equipment all need to be respected. The roof surface itself may also be unsuitable for aggressive washing or uncontrolled runoff.
What professional equipment changes
Sunflow’s pressure-washer unit supplies controlled water through a purpose-built Kärcher solar-cleaning lance and non-abrasive brush. This is different from aiming an exposed high-pressure jet at the glass. We also check the roof, array and weather before starting.
What owners should avoid
Do not scrape panels with metal tools, use scouring pads, stand on modules or introduce abrupt temperature changes to hot glass. If manufacturer documentation specifies a particular cleaning method or restriction, that guidance should be followed for the specific installation.
Sources and further reading
How Sunflow can help
Sunflow helps Cape Town homeowners and property managers keep solar panels, gutters, roofs, paving and exterior walls clean and well maintained. Send us a few photos and we’ll recommend the right next step.
Read about professional solar-panel cleaning →