Just to clarify - polycrystalline and multicrystalline are two terms for the same technology. I'm not sure what type of panels would be best suited to Darwin. I've never actually been to Darwin, but I imagine it can be more cloudy, with less direct solar radiation. There are claims that thin film panels perform better in cloudy conditions but I can't find anything substantial to back this up. If others have additional thoughts on this, please feel free to post.