Solar Panels on Metal Roofs
Metal roof solar installation has gotten complicated with all the mounting options, clamp types, and integration concerns flying around. As someone who has installed solar on every roof type, I learned everything there is to know about getting panels onto metal roofs right. Today, I will share it all with you.
Why Metal Roofs Work Well
Probably should have led with this section, honestly—metal roofs often outlast solar panels themselves, exceeding 50 years of service life while panels typically last 25-30 years.
Advantages
That’s what makes metal roofs endearing to us solar installers—several factors work in their favor:
- Seamless Integration: Standing seam roofs need no drilling—clamps attach directly to seams
- Reflectivity: Metal reflects solar energy, reducing cooling costs
- Strength: Provides sturdy mounting surface for extreme weather
- Cool Roof Combination: Reflective metal plus solar panels maximizes energy efficiency
Roof Types for Solar
Standing Seam
Most popular for solar. Clamps attach to seams without puncturing roofing material, preserving integrity and preventing leaks.
Corrugated
Requires more intricate racking due to undulating surface. Special brackets ensure secure fit.
Metal Shingles
Mimic traditional shingles but offer metal’s longevity. Installation requires careful planning to avoid shingle damage.
Installation Process
- Assessment: Evaluate roof condition, orientation, and shading
- Mounting Selection: Choose clamps for standing seam, special brackets for corrugated
- Hardware Installation: Attach rails, clamps, or brackets
- Panel Placement: Position for maximum sunlight exposure
- Electrical Wiring: Connect to home system with inverters
Maintenance
- Periodic cleaning to remove dirt and maximize absorption
- Regular mounting system inspections
- Monitor energy output for performance drops
Benefits
- Cost Savings: Metal roofs reduce cooling costs; solar cuts electricity bills
- Environmental: Clean energy reduces fossil fuel reliance
- Property Value: Solar-equipped homes often see value increases
