Programm Photovoltaik Ausgabe 2009 ... - Bundesamt für Energie BFE

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In CIS modules (WSG0036E075 of Würth and SCG55-HV-F of Sulfurcell) the initial power Pa as
measured out of the box is always lower than the initial limits of allowance of the modules. The low
intensity of the indoor applied bias light is probably not sufficient to stabilise the power to its real value.
It is expected that the first exposure at outdoor conditions will bring the power closer to declared power.
Remarks regarding the measurement of some module types:
� Electrical characterization of Sanyo HIP-210 NKHE1 modules, with HIT solar cells, is made by
means of multiflash method due to the presence of capacitance effects;
� Measurements on amorphous silicon devices (Sharp NA-851WQ and Bangkok Solar BS40) are
performed with filtered reference cell (nominal power Pn refers to stabilized power);
� Measurement on CIS samples (Würth WSG0036E075 and Sulfurcell SCG55-HV-F) are performed
with bias light.
The measurements have been effectuated with the reference cell calibrated according to the updated
norm IEC 60904-3 (version 2008). In the new norm has been defined a standard spectrum slightly
different. This change leads to a difference in power of +0.69%. The Pn values supplied by the manufactures
are presumably defined in function of the previous version of the norm (1989).
Long term outdoor Energy rating measurements
In 2008 the request of services for outdoor measurements for the energy rating comparison has
grown. Unfortunately, in 2008, only 3 (three) Energy Rating comparison in field were performed for the
industry. Indeed the roof of the SUPSI building where it was planned to accommodate the installations,
propriety of the Canton of Ticino, has not been yet restored. Moreover the supplemental stands
used so far, have been employed for another research project [5] and it was not possible to use them
for the services.
The construction of the stands (MPPT3000 and box) has continued. To be totally operative by the end
of March 2009, the old plant of 10 kWp will be dismantled (building B) in order to leave room for the
new stands, and afterwards it will be reinstated on the new restored roof (building A).
For the construction of the new MPPT3000 [2] it has been decided to look to the outsourcing. All the
electronic assembly was outsourced to Juri Elettronica as main supplier. In order to outsource the
product it was necessary to prepare a planning of the project, create new bills of materials (BOM) and
working process procedures. Juri Electronica has ordered all the materials and components to assembly
the three pcb's (Power Print, ADSP print and Display print) and then they have mounted traditional
and SMD components. The assembly of heat sink and pcbs and the rest of materials was made
by ISAAC staff (assembly of the Power print on the heat sink, fix diodes and transistors. Assembly the
ADSP print using spacers and connectors. Connect and fix the display print. Build and sold the coil,
sold the capacitors and connectors on the pcb.
Once the assembly of the MPPT is done, electronic examinations and calibration tests are necessary.
60pcs of MPPT3000 have been produced for this project use and for various other projects (Scerri,
Bellinzona / CPT 2, Canobbio). The rest 40pcs are available for future projects and also for sale.
National and International collaborations
Solarday (I); Ocean Optics, (UK), GMP, (CH); ECN, (NL) ; TÜV, Köln (D) ; JRC, Ispra (I) ; PASAN SA,
P.-R. Beljean, Neuchâtel (CH) ; EU FP6 IP « PERFORMANCE » project [2] partner ; Dipartimento
Tecnologie Innovative (DTI), SUPSI ; Juri Electronica, Ambrì (CH), PSI, Villigen (CH).
Centrale di test ISAAC-TISO, D. Chianese, SUPSI, DACD, ISAAC-TISO
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