15 MW solar park with small inverters

A sketch of the finished solar installation in Minowa, Nakagawa, Tochigi prefecture, Japan. (Photo: Solar Frontier)
A sketch of the finished solar installation in Minowa, Nakagawa, Tochigi prefecture, Japan. (Photo: Solar Frontier)

The three companies Takara Leben, Hitachi Zosen and Solar Frontier start building a solar park with a capacity of 15 MW on a former golf course in Japan. For the first time in Japan, such a project will use 20 kW inverters instead of central inverters.

The former golf course where the 15 MW solar park will be built belongs to the real estate company Takara Leben, who will also be the operator of the finished solar park. The EPC contracting company is Hitachi Zosen and the CIS modules are supplied by the Japanese module producer Solar Frontier. It is the first project in Japan, where 20 kW inverters are used for a high voltage project with a capacity of several MW. Compared to conventional silicon modules, CIS modules tolerate a higher grade of shading and have higher temperature stability, which lead to a higher overall energy yield on areas facing north. The solar park in Nakagawa in the Japanese Tochigi prefecture is expected to produce about 21,000,000 kWh annually.

By using small inverters, the solar park can be installed more easily on the different fields of the golf course which vary in size and sometimes contain bodies of water. Additionally, this will reduce the risk of energy losses because smaller inverters can be exchanged more quickly if they are damaged. Every module will be mounted on a single pillar. So there is no need for groundwork and in comparison to earlier installations only half the number of pile drivers is needed, resulting in a shorter installation time and less damage to the environment.

Tanja Peschel

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