DIY Solar Mounts: 304 vs 316 Roof Racks

 

Why 304 suffices for dry climates?
Handles UV and rain for 20+ years. Use zinc-plated bolts to prevent galvanic corrosion.

 

When is 316 mandatory?
Within 10 miles of coastlines or industrial areas. Molybdenum fights salt/acid rain pitting.

 

Preventing roof stains?
Install rubber washers between mounts and roof. Clean pollen/dust buildup biannually.

 

Inspection checklist?
Check bolt torque yearly. Look for white corrosion at joints. Ensure no water pooling.

 

Grounding requirements?
Use bare copper wire with stainless lugs. Apply anti-oxidant paste to connections.