Can an energy audit identify shading issues in solar systems?

Assessing Solar Panel Performance

A thorough energy audit will involve inspecting the solar panel array, looking for any physical obstructions or shading sources such as trees, buildings, or other structures. The auditor will also analyze historical energy production data, using tools like solar panel monitoring systems or inverter data to spot any patterns or anomalies that may indicate shading issues. By comparing energy production to expected levels, the auditor can identify potential shading problems.

Quantifying Shading Effects

Shading can reduce solar panel efficiency by up to 70% or more, depending on the severity of the shading. In a typical residential solar panel system, a 1% shading issue can result in a 1.7% reduction in annual energy production. To give you a better idea, a 10% shading issue can equate to a 17% annual energy loss. By quantifying these effects, the energy auditor can provide a clear picture of the shading impact on the solar panel system.

Shading Mitigation Strategies

If shading issues are identified during the energy audit, there are several mitigation strategies that can be employed. These may include pruning trees, installing solar panel tracking systems, or even replacing existing solar panels with more efficient models. In some cases, relocating the solar panel array to a sunnier location may be the most effective solution. By taking proactive steps to address shading issues, homeowners can maximize their solar panel system’s performance and energy output.