Central solar inverter reduces total system costs by using higher AC- and DC- voltage levels

Metzingen (ots) -

- New REFUsol 333K central inverter maximise standard components
used in wind power and industrial plants

REFUsol GmbH, one of the leading manufacturers of solar inverters,
will present its new inverter REFUsol 333K at this year's Intersolar.
As a central element supporting the conversion of energy, solar
inverters are vital for the profitability of photovoltaic plants. The
highly efficient new inverter significantly decreases the total
system costs of outdoor and industrial roof installations, therefore
supporting a profitable, cost efficient design of larger photovoltaic
plants.

With 333kW of nominal power and the patented UltraEta® circuit
topology, the solar inverter reaches a peak efficiency of over 98.5
per cent, which allows for optimised energy conversion and usage. The
REFUsol 333K features a higher AC-voltage of 690V, which is the
established standard voltage level in industrial networks and wind
power plants. It also features a higher DC-voltage of up to 1500V.
Consequently, industrially-manufactured standard transformers and
compensators can be used.

Due to the high input voltage longer strings can be achieved. At
the same power level this also leads to lower losses within the
string. Compared to a standard output voltage of 400VAC with the same
cable cross section, the higher output voltage also results in a
reduction of line losses by 76 per cent. It also enables the
simultaneous operation of several devices on one transformer.

With a compact form factor and a low weight of approximately
850kg, the handling of the inverter is cost efficient, as expenses
caused by logistics and infrastructure requirements are reduced.
REFUsol 333K is ideally suited for large solar parks as well as
industrial rooftop systems. In addition, the special outdoor housing
technology together with IP65 protection makes the inverter sheltered
against dust and water streams. When combined with an optimised
cooling, the solar inverter is suitable for deployment in extreme
climatic and environmental conditions.

The REFUsol 333K is the ideal solution for project planners and
installers as no additional qualification is required for the
installation due to the low voltage level. The inverter will be
available in Q4 2011.

Press contact:
Hotwire PR
Saskia Stolper
T: +49 (0)69 2566 93-50
F: +49 (0)69 2566 93-93
E: saskia.stolper@hotwirepr.com