Last year, TenneT installed five new direct current (DC) offshore connection systems in Germany, bringing available capacity for transporting wind energy generated at sea to 4.3GW.
The company said its investments in Germany had helped to report positive results in 2015. Its earnings before interest and tax increased to €1.075bn in 2015, compared to €725m in 2014.
TenneT CEO Mel Kroon said: "It is important to invest effectively and efficiently in high voltage grids that are needed in a society that is increasingly based on the use of electricity.
"We will continue to work hard and to invest to maintain the quality of our existing grid as well as to be able to transport large volumes of renewable energy from new sources."
The Netherlands government also plans to recruit TenneT to design, build and manage an offshore grid on the North Sea, which is expected to produce around 3.5GW of renewable wind energy by 2023.
The company said that it increased the cross-border electricity transmission capacity by using a mechanism called flow-based market coupling, bringing electricity prices across Europe closer together.
The firm has started development of two new interconnector-projects, which connect Germany to Norway (NordLink) and the Netherlands to Denmark (COBRA cable). The projects will increase the supply of renewable energy in the Northwest European area.
