RE:50 Hz You're correct on most things old nagger, but on this you're out to lunch. Wind turbines in North America generate at 60hz. Solar panels generate DC which then go through ICBMs to get turned into AC at whatever frequency you want, in North America it's 60 hz. Changing frequency is very easy. Any big electrical motor and some small ones will start with a VFD - variable frequency drive. I ain't the smartest but I've been in a few wind turbines.