Sputnik and Sunflow dedicate MW plant on 20 former NATO bunkers in Markt Taschendorf
With a total output of one megawatt the solar power plant on the former ordnance depot is one of the largest in Franconia. Twenty-seven inverters made by the Swiss manufacturer Sputnik Engineering AG turn the power generated by the 5,700 solar modules into the alternating current used on the grid. The solar modules generate roughly one million kilowatts annually, enough to power 400 households. On the 16 May, the system supplier Sunflower and the inverter maker Sputnik Engineering introduced this showpiece to the general public.
Plant Markt Taschendorf, Germany
After the ceremonial opening speech, Sunflow presented its newly developed tracking system that boosts the yield from solar power plants by as much as 30 percent. "We have developed this system in cooperation with the Amberg-Weiden University especially for industrial roofs," explained Sunflow CEO Stephan Riß. In the case of these roofs, you have to take into account their varying static and design characteristics. Because the roofs are very light they cannot support heavy loads. Moreover, the sun sail must not be too large, so that it cannot be damaged by the wind. "We have built a light-weight but stable system," according to Riß. A test plant will go into operation this month at the Amberg-Weiden University.
The subsequent podium discussion included business people, scientists and politicians who talked about the possibilities and benefits of regenerative energies in structurally weak regions. Pierre Kraus, sales engineer at Sputnik's Germany subsidiary Sputnik Engineering GmbH, held a talk entitled `SolarMax – the flexible inverter`.
Specifications:
| Power output | 1 MW |
| Modules | Mono- and polycrystalline modules |
| Inverters | SolarMax 35 S (27x) |
| Inclination and orientation | Inclination 27.5°, South |
| Expected annual yield | about 970 kWh/kW |
As Mr Kraus noted: "The SolarMax inverters have a very broad input
voltage range. This is why we were easily able to connect three
different module types into strings with the inverters at the solar
plant in Markt Taschendorf. Because the SolarMax inverters also work
across a broad range of temperatures and the housing meets the IP54
protective standard there was no need for Sunflow to drill any holes in
the bunker roofs to wire up the units, and they were free to place the
inverters at a suitable outdoor position." Additional advantages which
Mr Kraus mentioned were the light weight of the transformer-less units
and the high degree of availability. "The SolarMax 35S central inverter
is among the first genuinely three-phase transformer-less units on the
market. Because three-phase inverters have less need for temporarily
stored energy, we can do without electrolytic capacitors. In the new
SolarMax-S series we only use film capacitors. They extend the life of
the units because, in contrast to capacitors which run on liquid
electrolytes, they do not dry out."
In the afternoon the winners of a children’s energy competition
were awarded prizes which Sunflow had announced in all the
kindergartens and schools in Middle Franconia. Hans-Josef Fell, member
of the Bundestag, presented the winners with exciting weekend trips to
the Bavarian Forest, entrance tickets to Legoland and sets of
educational building blocks all about renewable energy. The dedication
ended with a spring festival complete with Bavarian cuisine and music.
