Biel, Switzerland [RenewableEnergyWorld.com] This month in Hemau, Germany, the first megawatt size plant built by Sputnik Engineering, a Swiss inverter manufacturer was commissioned. The 632 photovoltaic (PV) plant was installed on open land by SolaStrom Systems GmbH, a system integrator based in Augsburg.
At the site, the traditional low-voltage transformer (400V) is not used because two of a new type of SolarMax central inverter, the SolarMax 330C-SV, feed power directly into the transformer on the medium-voltage grid.
The transformerless technology of these new inverters has enabled Sputnik to cut both the size and the weight of the system by half compared with the previous models. At the same time, Sputnik’s developers said that they have boosted efficiency by 1.5 percent. The investor and system operator expect the pay back period on the system to be seven years.
The project receives guaranteed pricing, from the local grid operator through Germany’s Renewable Energy Act, of €0.3194 for every kilowatt hour of solar power produced.