Thanks for taking an interest.
This morning I laid out a small wind farm called High Praire, with 67 turbines, in Minnesota. I'm not sure if it's been built yet. The turbines were placed by overlaying the site map from the site application form.
Here is the skp file.
http://www.thumbpower.net/kmz/High%20Praire%20Turbines%20in%20place.skp 7MB
Here is the KMZ file created by using "Place" into GE, then saving to kmz in GE. http://www.thumbpower.net/kmz/High%20Praire%20Wind%20Farm%20placed%20and%20saved%20in%20GE.kmz 3.78 MB
Here is the KMZ file created with the export function of sketchup.
http://www.thumbpower.net/kmz/High%20Praire%20Turbines%20in%20place.kmz 11.9 MB
The KMZ file created by sketchup is big, slow to load, and choppy to navigate. It's only virtue is all the models are clamped to the earth. The KMZ file created by GE is smaller, and navigates much better, but as the models get farther from the origin they float higher off the ground. To see that in this model, which only stretches about 10 miles you have to navigate close to a tower and look from ground level.
Trying to save the kmz created by sketchup from GE causes GE to crash in the attempt.
Why does sketchup create a more complicated larger KMZ than google earth? Shouldn't they both create the same size KMZ? Every turbine is identical and has the identical orientation so the KMZ file only needs to be the geometry of one turbine plus the 67 locations where they will be placed. It should be a reletively small kmz. The size of both KMZ files suggests the model is being saved multple times.
Thanks again for taking an interest
Charlie