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770 PHOTOVOLTAIC SYSTEMS<br />

Figure 17.17 Photovoltaically powered purification unit at a wind powered water pump in Balde<br />

del Sur de Chucuma/Argentina (Source: Fraunhofer ISE, Freiburg)<br />

re-filling battery water etc.). Therefore, involving them in the operation of the PV system,<br />

making them responsible for operation and maintenance is not only a measure to reduce<br />

the costs but also to increase their own satisfaction with the energy service provided (see<br />

Figure 17.18) [8, 20].<br />

The users also play a decisive role in the evaluation of photovoltaic systems. They<br />

make the final decision on whether photovoltaics is a practicable and useful form of<br />

electricity generation for them. Satisfaction with the systems is – apart from economic<br />

arguments – the factor determining their further dissemination. Only contented operators<br />

will recommend this form of electricity generation to further potential users, which is<br />

certainly the most effective form of advertisement. In order to best adapt the system to

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