Comparison of the operation and energy yield of 3 grid connected 1kWp-photovoltaic plants (Newtech 1-3) with different thin film solar cells-technologies (a-Si-triple-cells, a-Si-tandem-cells and CuInSe2-cells). The 3 PV plants are at the same location and each of them is operated with an own, identical inverter (ASP Top Class Spark).

BFH-TI Burgdorf has installed an analytical monitoring system for detailed analysis of the 3 PV plants.

Initial degradation of the modules will be measured. Therefore the monitoring system and the PV plants started operating at the same time.

Operation of the PV plant and the monitoring system started on 17.12.2001.
 

• normalized analysis
  

Location:	Burgdorf; 540 m
Orientation:	0° south, 30° tilted
Start up:	17.12.2001
Measured parameters:	In-plane solar radiation with a pyranometer Module temperature and ambient temperature Solar cell temperature of the 3 PV generators DC current and DC voltage (from each plant AC power (from each plant) Line voltage at the incoming point of a phase (from each plant)
Newtech 1:
Module:	Siemens ST 40 (CuInSe2-cells) (24 pieces)
PV generator power:	960 Wp (nominal)
Gross area:	10.21 m2
Inverter:	ASP Top Class Spark
Newtech 2:
Module:	Solarex Millennia MST 43-LV (a-Si-Tandem cells) (20 pieces)
PV generator power:	860 Wp (nominal)
Gross area:	16.37 m2
Inverter:	ASP Top Class Spark
Newtech 3:
Module:	Uni-Solar US-64 (a-Si-Tripel cells) (16 pieces)
PV generator power:	1024 Wp (nominal)
Gross area:	16.20 m2
Inverter:	ASP Top Class Spark