Clean the panels when dirt is visible or output drops.
When and how to clean
- Watch generation trends and look for visible dirt from a safe spot.
- Use trained help for roof access and cleaning.
- Use only the water quality, tools and method the manufacturer allows.
- Avoid abrasive tools, harsh chemicals and high-pressure jets unless the manufacturer approves them.
Safe access
Do not walk on panels, touch damaged wiring or climb an unsafe roof.
Your installer should show you how to switch the system off safely. Your agreement should say who handles maintenance.
A cleaning quote should state the panel count, roof access, water supply and method. The quote should also say whether a before-and-after check is included.