Can I Install Solar Panel On My Aluminium Composite Roof?

Yes, it can be done, but with aluminium composite panel (ACP) roofs it’s a “maybe, if done properly” rather than an automatic yes.

ACP is often used as a cladding/cover sheet (especially for patio roofs, car porches, linkways, awnings), and it may not be designed to take the pull and uplift loads from solar racking. The big rule is:

The solar mounting must be fixed to the roof’s structural members, not just the ACP skin

If the installer plans to screw/bolt into the ACP sheet alone, that’s a red flag.

What usually decides if it’s workable

1. What type of “ACP roof” is it actually?

   • If it’s an ACP sheet over a steel/aluminium subframe (common for outdoor shelters), solar can be possible if mounting hits purlins/rafters correctly.

   • If it’s more like a decorative canopy or thin-framed structure, it may be unsafe or not worth the reinforcement cost.

2. Penetration vs non-penetration mounting

   • For many metal roofs with seam profiles, clamp systems can avoid drilling through the roof skin. That’s generally preferred for waterproofing.

   • ACP roofs often don’t have the same seam geometry, so you may still need engineered brackets that tie into the frame and are properly sealed.

3. Structural and wind uplift checks (Singapore is not gentle with wind and storms)

   • A PV system adds dead load (weight) and wind loads. BCA’s guidance stresses structural safety checks for PV installations, especially on existing buildings.

   • If the works trigger structural/building plan requirements, a Qualified Person submission to BCA may be needed.

4. Fire safety requirements

   • Roof PV installations in Singapore have specific SCDF Fire Code requirements (access, labelling, emergency shut-off info, clearances, etc.).

   • There are also fire-safety considerations for roof PV systems and separation requirements depending on context.

Practical checklist to tell your installer (so you don’t get a “hope-and-pray” job)

• Show me where the anchors land: must be into purlins/rafters/trusses, not just the ACP panel.

• Waterproofing method: if any penetrations, ask for the flashing/sealant system details and warranty in writing.

• Corrosion isolation: ACP/aluminium + stainless/galvanised parts can cause galvanic corrosion if done badly (need proper isolators).

• Fire and access compliance: confirm they design to SCDF Fire Code requirements for rooftop PV.

• Permits/submissions: confirm whether your case needs BCA submissions and how they handle it.

• Follow local best practices: URA has a best-practices advisory for rooftop solar installations.