12m Outdoor Solar Street Light Pole

1. Structural Lifespan: 20 – 30+ Years

This refers to the steel shaft's resistance to collapse, severe deformation, or structural failure.

    The Gold Standard: The lifespan is determined primarily by Hot-Dip Galvanization. A 12m pole must be submerged in molten zinc to create a protective layer (typically $>85\mu\text{m}$ thick).

    Environment Factor: In standard urban environments, the galvanized steel can remain rust-free for over 30 years. In high-salinity coastal areas, this may drop to 15–20 years due to accelerated chemical corrosion.

2. Aesthetic/Surface Lifespan: 10 – 15 Years

This refers to the color retention and gloss of the outer coating.

    Powder Coating: After galvanization, Decano applies an electrostatic polyester powder coating.

    Weathering: After about 10 years of intense UV exposure, dark colors (like Black or Charcoal Grey) may begin to "chalk" or fade slightly. While the structure remains safe, the pole may require a cosmetic touch-up or repainting to maintain its premium look.

3. Solar Component Lifespan: 5 – 25 Years

While the pole itself stands for decades, the solar technology mounted at the 12m height has different cycles:

    Solar PV Panels: Designed for 20–25 years (losing about 20% efficiency over this period).

    LED Luminaire: High-quality LEDs (like those used by Decano) last approximately 50,000 to 100,000 hours (roughly 10–12 years).

    Battery & Controller: These are the "consumables" of the system. Even high-end LiFePO4 batteries typically need replacement every 5–8 years to maintain optimal backup performance.

The Bottom Line

A Decano 12m solar pole is a 25-year asset. You are essentially investing in a permanent steel structure that will outlast its internal electronics. To keep the system operational for its full life, you should plan for a battery and controller "mid-life refresh" around Year 7.