Rotating rooftop solar arrays are an advanced technology that maximizes solar energy capture by following the sun’s path throughout the day. While highly efficient, these dynamic systems present unique challenges for Energy Performance Certificate (EPC) assessments. Standard EPC models assume static solar installations, and may not fully account for the energy fluctuations, shading effects, and efficiency gains provided by rotating arrays.

Key EPC Challenges

1. Dynamic Solar Gain
Rotating solar panels continuously adjust their orientation to capture optimal sunlight. This affects both energy generation and shading patterns on the building, which can influence heating and cooling loads. EPC models need to account for this dynamic behavior to avoid under- or overestimating energy performance.

2. Variable Energy Contribution
The energy produced by rotating arrays can vary daily and seasonally. EPC assessments must include time-dependent generation data to accurately model the building’s overall energy efficiency.

3. Shading and Thermal Effects
Rotating panels can cast moving shadows on the roof and facade, affecting internal temperature regulation. These variations impact HVAC loads and must be incorporated into EPC calculations.

4. Integration with Building Systems
Buildings with rotating arrays often pair them with energy storage systems, smart grids, or heat pumps. EPC modeling must reflect the interactions between solar energy, storage, and other systems to produce reliable ratings.

5. Monitoring and Data Requirements
Dynamic solar systems require advanced monitoring for accurate EPC evaluation, including tracking orientation, efficiency, and energy output throughout the year.

Strategies for Accurate EPC Assessment

  • Dynamic Solar Simulation: Model the changing orientation and energy capture of rotating arrays. Learn more on our About Us page.

  • Time-Dependent Energy Modeling: Include seasonal and daily variations in solar energy generation. Book an assessment here.

  • Shading and Thermal Impact Analysis: Evaluate moving shadows and their effect on internal heat loads. Check our services.

  • System Integration Assessment: Model interactions between rotating solar arrays, storage, and building energy systems. Learn about our pricing.

  • Advanced Monitoring: Implement sensors and tracking systems to gather precise data for EPC calculations.

Contact EPC Rate

Buildings with rotating rooftop solar arrays require specialized EPC assessment approaches to ensure accurate energy efficiency ratings. For expert evaluation and consultation, contact EPC Rate.