Biosolar integration combines high-performance green roofs with photovoltaic (PV) solar panels, creating a synergistic system that maximizes both ecological and energy output.
- Optimized PV Performance: The cooling effect generated by the green roof's evapotranspiration lowers the ambient temperature immediately surrounding the solar panels. This can increase the efficiency (kW output) of the PV array by 5% to 15% compared to panels installed over bare, hot roofs.
- Ballast Reduction: The weight of the green roof media can often serve as the non-penetrating ballast needed to secure the solar racking system, eliminating the need for heavy concrete blocks or structural roof penetrations.
- Dual-Use Credit: Provides two forms of environmental credit—renewable energy generation and green area coverage—using the same rooftop footprint.
- System Protection: The green roof protects the PV wiring and ballast components from thermal expansion and degradation, ensuring the long-term reliability of the entire solar investment.
Green Roof System Comparison: Choosing Your Performance Level
| System Characteristic | 4-Inch High-Performance Extensive | 6-Inch Deep Extensive / Semi-Intensive | 8-Inch Intensive Modular |
|---|---|---|---|
| Primary Goal | Lowest Load & Cost-Effective Compliance | Optimal Balance of Performance & Weight | Maximum Performance & Amenity Space |
| Typical Saturated Weight | 15 – 25 lbs/ft2 | 30 – 45 lbs/ft2 | 35 – 55 lbs/ft2 |
| Structural Requirement | Minimal—Ideal for most retrofits. | Moderate—Suitable for most modern commercial buildings. | High—Requires verifiable structural capacity. |
| Annual Stormwater Retention | 40% – 60% | 50% – 75%+ | 50% – 90% (Highest retention volume). |
| Plant Palette | Sedum Cuttings/Mats (Hardiest species only). | Diverse Sedums, resilient Grasses, and Perennials. | Wide Variety (Supports shrubs, large perennials, and custom gardens). |
| Energy Impact | Excellent UV protection and cooling effect. | Strong insulation for year-round thermal benefits. | Highest R-Value and maximum HVAC efficiency impact. |
| Usability/Access | Non-accessible; designed for maintenance access only. | Non-accessible; designed for maintenance access only. | Accessible Rooftop Amenity Space. |
E Questions
Some frequently asked questions about this product
Suitable for flat or low-slope commercial, residential, and institutional roofs.
Depending on the area, installation can take 2–4 days.
Yes, E is designed to be installed over standard waterproof membranes.
Periodic weeding and seasonal checks; minimal effort needed.
Yes, it helps regulate indoor temperature and reduce HVAC loads.
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