Shaded Roofs: Which Inverter Type Handles Shading Best?

Choosing the Right Inverter for Shaded Roofs

When it comes to installing solar on a shaded roof, the type of inverter used can significantly impact system performance. Microinverters, in particular, are well-suited to handle shading issues due to their individual panel optimization capabilities. By converting DC power from each panel to AC at the panel level, microinverters can isolate and optimize power production from each shaded panel, minimizing the impact on overall system efficiency.

Microinverter Benefits in Shaded Environments

In contrast, traditional string inverters convert DC power from an entire string of panels at once. This means that if one panel is shaded, the entire string is affected, reducing overall system efficiency. For example, if a 10-panel string inverter is designed to produce 2,000 watts of power, and one panel is shaded, the system may only produce 1,800 watts. In a microinverter system, each panel would be producing around 200 watts, with the shaded panel producing a reduced amount, but the overall system efficiency would be less affected. This makes microinverters a better choice for shaded roofs.

System Design Considerations

When designing a solar system for a shaded roof, it’s essential to consider the layout of the panels and the type of inverter used. To maximize system efficiency, panels should be installed in a way that minimizes shading on individual panels. This may involve rotating panels to face south, or installing panels at an angle to reduce shading from trees or buildings. In addition to the inverter type, system designers should also consider the use of monitoring and control systems to optimize system performance and identify potential shading issues.