Before you start
Gather the appropriate supplies and review the specific equipment manual.
- Panel performance history
- Sun position observations
- Shading sketch
Step-by-step instructions
Record output at similar times
Use several days of controller data to avoid mistaking clouds for equipment faults.
Watch boom and mast shadows
Note how shading changes at anchor and underway as sails and boat heading move.
Review the mounting layout
Consider panel angle, airflow, water drainage and structural mounting points.
Assess grouping
Panels with different shade patterns may benefit from thoughtfully designed independent charging channels.
Recheck after changes
Compare watt-hours rather than only maximum momentary watts.
Safety note
Do not modify mounted panel wiring while energized. Any structural changes to a solar arch should be engineered appropriately.
Key takeaway
Even narrow rigging shadows can noticeably reduce output from some panel arrangements.
Keep this job on your maintenance schedule
Save the topic as a maintenance task, choose a due date or engine-hour target, and record future service. Free and stored on your device.
Add to my maintenance plannerThis guide is for general education. Follow your equipment manufacturer’s instructions, current navigation guidance and applicable marine safety standards. When uncertain, use a qualified marine professional.