How shade impacts home solar performance

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Solar energy is one of the most efficient and clean energy sources available to us today. Home solar energy systems can generate a substantial amount of electricity by utilising the power of the sun. However, the performance of a home solar system relies heavily on the amount of shade that falls on the solar panels.

Shade can have a significant impact on the performance of a solar energy system. Even a small amount of shading can greatly reduce the amount of sunlight that reaches the panels, which in turn reduces the amount of electricity generated. 

The main reason why shading is so problematic for solar panels is that they are wired together in series. This means that a shaded panel will reduce the overall voltage of the system. With less voltage, the inverter cannot convert the direct current (DC) electricity generated by the panels into alternating current (AC) electricity that can be used in your home. 

In addition to reducing the overall voltage, shading can also result in hotspots on the panels. A hotspot is a localised area where the cells in a solar panel get hotter than the rest of the panel. This can happen if the panel is partially shaded, as some cells continue to generate electricity while others do not. This imbalance can lead to damage to the panel and a reduction in its efficiency.

It is important to note that shading does not just come from trees or buildings. It can also be caused by things such as chimneys, vents, and other obstructions on the roof. Therefore, it is essential to consider all potential sources of shading when installing a solar system.

Fortunately, there are ways to mitigate the impact of shading on a solar energy system. One approach is to utilise micro-inverters or power optimisers that can reduce the impact of shading on individual panels. Another option is to carefully design the system to ensure that shading is minimised or avoided altogether.

In conclusion, shading can have a significant impact on the performance of a home solar energy system. Therefore, it is crucial to consider potential sources of shading when designing and installing a solar energy system. By taking the necessary steps to reduce shading, homeowners can maximise the performance and efficiency of their solar panels and ultimately lower their energy bills.


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