Stock code: 601677
Stock code: 601677
Solar panel frames must withstand wind, sun, and last over 20 years. Choose the wrong material, and the frame will bend or corrode – ruining the entire system.
Aluminum sheet for solar panel frame is the current mainstream choice. But with so many alloys and thicknesses available, buyers often ask: which one is truly best for your frame?
Below we explain the key factors you must check when selecting aluminum sheet.
– Lightweight – At the same strength, aluminum is 2/3 lighter than steel. Less roof load.
– Corrosion resistant – Aluminum naturally forms an oxide layer. No painting needed against sun and rain.
– Long life – Handles outdoor exposure, acid rain, and salt spray. Designed for 20+ years.
– Recyclable – After the PV system retires, the aluminum can be sold for scrap.
In short: aluminum gives the best value for solar frames.
|
Alloy |
Strength |
Bendability |
Best for |
|
High(Tensile ≥260MPa) |
Moderate |
Large power plants, high wind/snow areas |
|
|
Medium |
Excellent (won’t crack) |
Residential roofs, curved frames |
|
|
3003 H14 |
Low |
Very good |
Temporary or light‑duty small panels |
– Ground‑mount projects, heavy snow or wind → 6061 T6
– Residential roofs, frames with many bends → 5052 H32
– Do not substitute 3003 for 6061 – it will bend in strong winds.
– 1.0 – 1.5 mm: small home panels (<400W)
– 2.0 – 3.0 mm: commercial or ground‑mount systems
Don’t blindly chase thicker sheets. Choosing the right alloy is more effective. Extra thickness only adds cost.
– Yield strength ≥ 200 MPa (6061 T6 meets this)
– Elongation ≥ 10% (ensures bending without cracking)
– Hardness (HB) 60–95 (affects screw holding force)
Meet ASTM B209 or EN 485 standards. Thickness tolerance within ±0.05 mm.
Loose tolerances cause misaligned holes – your assembly line stops.
Aluminum itself resists salt spray. But alloys differ greatly.
Recommended : 5xxx (5052) and 6xxx (6061). Copper‑containing alloys (e.g., 2024) suffer intergranular corrosion – never use them for solar frames.
Within 500m of the coast, standard aluminum sheet lasts 15–20 years. For harsher environments, anodized sheet is an option (buy separately – this article covers only bare sheet).
– Mill certificate – clearly states alloy and temper (e.g., 6061 T6)
– Flatness – twist ≤1mm per meter, otherwise welding deforms the frame
– Clean surface – no oil, scratches, or corrosion spots
– Dimensional accuracy – length, width, diagonal errors within drawing limits
– Supplier qualification – ISO 9001, ideally with PV industry supply records
– Mistake 1 – Thicker is always better → No. 2.5mm 3003 is weaker than 2.0mm 6061.
– Mistake 2 – Any aluminum sheet works → Wrong. 3003 frames will bend in high winds.
– Mistake 3 – Ignoring tolerances → Loose tolerances cause misaligned holes and low assembly efficiency.
Choose the right alloy, thickness, and tolerance – then your solar panel frame will last 20 years.
> Mingtai Aluminum supplies PV‑grade 6061/5052 aluminum sheet with precise thickness tolerances and consistent mechanical properties – helping your frame perform outdoors for decades.
Q1: What thickness of aluminum sheet is common for residential solar frames?
A: 1.5 mm is most common. For panels under 400W, 1.2–1.5 mm is enough.
Q2: Which is easier to bend – 5052 or 6061?
A: 5052. It has higher elongation (~12–15%) and rarely cracks during bending. 6061 is stronger but needs a larger bend radius.
Q3: How long does an aluminum frame last near the coast?
A: More than 500m from the coast, bare 6061/5052 sheet lasts 15–20 years. For closer locations, ask your supplier about surface treatment options.
Q4: How much more expensive is aluminum sheet than galvanized steel?
A: About 1.5–2 times higher by weight. But aluminum needs no rust maintenance and has scrap value after 20 years – lower total cost.
Q5: Do you supply pre‑cut aluminum sheet?
A: This article focuses on standard sheet selection. For cutting, punching, or bending, please check with your supplier directly.
