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

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Presentation transcript:

FLAT ROOF THIN-FILM PV COMPARED TO TILTED THIN FILM AND CRYSTALLINE PV Ron Swenson SolarQuest ® P O Box 7080 Santa Cruz, CA

Experimental Setup: Three Types of PV Arrays.

Horizontal Amorphous Arrays a

Thin Film Panels Glued to Foam Roofing.

Foam Roofing Handles Penetrations No leaks

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

Cosine Loss Horizontal Amorphous Array Significant losses in Winter

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

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

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

Comparing Amorphous with Crystalline over Temperature Range Outcome Inconclusive

It Seemed Okay in March … Inverter losses

Inverter Losses.

Flat top haircut

Inverter Losses Flat top haircut

Monthly Energy Totals Horizontal ArrayTilted Array

See for yourself!

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