The main function of a Solar Panel Water Drain Clip (also known as a water diverter clip or drainage clip) was fixed the bottom edges of solar panels. It is specialized component and designed to efficiently channel water away from the solar panels, preventing water accumulation and potential damage.
Here’s a breakdown of why this Solar Panel Water Drain Clips in PV industry simple function is so important:
- Primary Function: Managing Water Runoff
Without the clip: When panels are installed flush against each other, water (from rain or melting snow) sheets off the glass surface and can get trapped between the panels and the frame. This water can be forced up under the panels, potentially leading to leaks onto the roof or into the mounting system.
With the clip: The clip acts as a physical spacer, ensuring a consistent and open channel for water to flow freely off the panels and away from the roof surface. It “diverts” the water off the system cleanly.
- Key Benefits and Secondary Functions of the Solar Panel Water Drain Clips in PV industry:
Prevents Debris Accumulation: A tight seam between panels can trap leaves, pine needles, dirt, and other debris. This buildup can create a dam effect, holding moisture against the panels and the roof, and potentially leading to:
Roof Damage: Persistent moisture can degrade roofing materials over time.
Corrosion: It can accelerate the corrosion of aluminum frames and steel mounting hardware.
Reduces Wind Uplift Stress: By creating a small gap, the clip helps equalize air pressure on the top and bottom of the panel array during high winds. This reduces the lifting force (wind uplift) on the panels, making the entire array more stable and secure.
Accommodates Thermal Expansion: Solar panels expand and contract with temperature changes. The small gap provided by the clip allows for this minor movement without putting stress on the frames or the mounting structure.
Analogy
Think of it like the weep holes in a brick wall. The bricks (panels) are the main barrier, but the small weep holes (drain clips) are essential for allowing any trapped moisture to escape, preventing long-term damage to the structure behind it.
Where is it Used?
These clips are a standard part of many spline-based solar mounting systems accessories. They are installed on the solar panels frames after the panels are clamped down.
Summary
In essence, the Solar Panel Water Drain Clip is a small, inexpensive component that plays a vital role in the long-term durability, structural integrity, and performance of a PV installation. It’s a key feature in modern racking design aimed at protecting the roof asset and ensuring the system lasts for its intended 25+ year lifespan.
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