Assumptions: The turbine is pretty close to an American (US) grid. National Grid will charge $50,000 to install isolation switches and remote control systems that let the device connect to the grid. The turbine will need electrical systems to convert the power it generates to power that can be used on the grid.
Question: Roughly speaking, how much will the systems to convert turbine power to grid power?
These systems would include HV breakers, power measuring devices, control systems for power output, frequency converters, transformers, and grid connection equipment.