TenneT to invest up to €5bn a year to prepare grids for energy transition The transmission system operator aims to develop an interconnector to connect up to 4GW of British and Dutch offshore windfarms Image: Shutterstock The largest grid operator in the Netherlands and Germany, TenneT, has unveiled plans to spend up to €5 billion (£4.2bn) every year to build the electricity infrastructure needed for the energy transition. The company, which has invested €3.4 billion (£2.9bn) last year to prepare European grids for the uptake of renewables, will explore with the National Grid Ventures the development of an interconnector to connect up to 4GW of British and Dutch offshore windfarms between the two nations’ electricity systems.