Galvanized steel: 

Galvanized steel is one of the common materials for solar roof supports. It has good corrosion resistance and oxidation resistance, and is suitable for various climatic conditions.

Aluminum alloy: 

Aluminum alloy is a commonly used material for solar roof supports because it has lower weight and good corrosion resistance. Aluminum alloy brackets can withstand most weather conditions and are durable.

Stainless steel: 

Stainless steel brackets have extremely high resistance to oxidation and corrosion, and are suitable for marine environments or high salinity areas. Its strength and durability also make it an ideal choice for solar roof brackets, but it is usually more expensive.

Carbon steel: 

Carbon steel brackets are an economical choice with high strength and durability. However, carbon steel needs to undergo anti-corrosion treatment to protect it from corrosion.