When considering solar energy, many factors come into play to ensure optimal performance and energy savings. One critical aspect often overlooked is shading, how shadows cast by trees, buildings, or other objects can influence the efficiency of your solar panels. At MPV Solar, we want our customers to understand how shading impacts solar panel performance and what you can do to mitigate its effects.

1. Reduced Energy Production

Shading on even a small portion of your solar array can significantly decrease its overall energy output. Solar panels are composed of multiple photovoltaic (PV) cells connected in series; if one cell is shaded, it can limit the current for the entire string, leading to less electricity generated.

2. The Role of Bypass Diodes

Modern solar panels are equipped with bypass diodes that allow electricity to circumvent shaded or damaged cells, reducing the impact of shading. However, while bypass diodes help, shading still causes measurable losses in energy production, especially if shading covers multiple panels or large sections.

3. Series vs. Parallel Connections

Panels connected in series are more susceptible to shading effects because shading on one panel affects the entire string’s voltage and current. Conversely, systems with parallel connections or microinverters can mitigate shading effects, as each panel operates independently.

• Trees and Vegetation: Overgrown branches can cast shadows during different times of the day or seasons.
• Buildings and Structures: Nearby buildings, chimneys, or vents can cast shadows, especially in morning or late afternoon.
• Debris or Snow: Seasonal snow accumulation or debris can temporarily shade panels.

• Site Assessment: Conduct a thorough shading analysis before installing panels. Our team at MPV Solar performs detailed shading analysis to optimise placement.
• Strategic Panel Placement: Position panels where they will receive maximum sunlight and are least affected by shadows throughout the day and year.
• Regular Maintenance: Trim trees or remove obstructions that create unnecessary shading.
• Optimal System Design: Use microinverters or power optimisers, which reduce shading losses by allowing panels to operate independently.

Shading can dampen the performance of your solar energy system, but with careful planning and design, its effects can be minimised. At MPV Solar, we are committed to helping you achieve maximum efficiency with tailored solutions suited to your property’s unique characteristics.

Interested in learning more or scheduling a free assessment? Contact MPV Solar today and we’ll help you join the solar revolution.