• Solar plaza (systematic inventory of manufacturers, research institutes etc + PV news)
  
• Photon International (PV magazine)
  
• Solarbuzz (PV news + continuous PV price survey)  
• PV Tech
• Renewable Energy World 
  
• PV World
• Real climate (the cool voice of science in a heated debate)
• Deep climate (analysis of the arguments of climate "sceptics")
  
• My view on climate change (blog of Dutch scientist)
  
• xkcd (fun for nerds)
  

• Sonnenseite
• Photon
• Volker Quaschning (Gute Quelle für Basiskentnisse PV Systemen)
  

• ECN-photovoltaics (nice link page)
• Zonne-energie.pagina (link overzicht)
• Wind Service Holland - nieuws (Het laatste Nederlandse windenergienieuws)
• Olino (Blog over duurzame energie en energiebesparing)
  

Disclaimer: Neither Jethro Betcke nor Oldenburg University are responsible for the content of the linked sites. Which is ofcourse rather obvious, but not to some internet-ignorant German judge who caused all this silly disclaimer stuff.