| Abstract |
The development of photovoltaic inverters has recently moved towards smaller units in order to
increase modularity and energy yield in shaded areas. The drawbacks are higher cost, as well as lower
efficiency in comparison with larger units. This paper compares eight decentralised configurations
and one conventional, with respect to efficiency and cost. Reliability and personal safety are also
considered. The pre-requisite is that standard PV-modules of 25-50 V, 110 W, are to be used and the
energy is to be transformed to the national grid of 230 V, 50 Hz. The recommended configuration is a
low voltage AC-bus, which can reduce costs while maintaining or improving efficiency and safety. |
