1. FLAT ROOF THIN-FILM PV COMPARED TO TILTED THIN FILM AND CRYSTALLINE PV Ron Swenson SolarQuest ® P O Box 7080 Santa Cruz, CA 95061 rbs@SolarQuest.com www.SolarQuest.com

2. Experimental Setup: Three Types of PV Arrays.

3. Horizontal Amorphous Arrays a

4. Thin Film Panels Glued to Foam Roofing.

5. Foam Roofing Handles Penetrations No leaks

6. Electricity Generated First Full Day of Operation Note late afternoon internal shading near solstice

7. Cosine Loss Horizontal Amorphous Array Significant losses in Winter

8. Cosine Loss Horizontal vs. Tilted Arrays Note horizontal performance approaches tilted on cloudy days

9. Comparing over Time Amorphous vs. Crystalline and Horizontal vs. Tilted Note similarity on cloudy days, increase towards summer

10. Comparing Amorphous with Crystalline Array Sunny vs. Cloudy Days Note Amorphous outperforms crystalline

11. Comparing Amorphous with Crystalline over Temperature Range Outcome Inconclusive

12. It Seemed Okay in March … Inverter losses

13. Inverter Losses.

14. Flat top haircut

15. Inverter Losses Flat top haircut

16. Monthly Energy Totals Horizontal ArrayTilted Array

17. See for yourself! www.ElectroScope.net