I’ve personally written hundreds of articles over the years. I selected a few I thought were pretty timeless or prescient, and worth rereading:
What is Cleantech? Always a good starting point:
The “Rules” in Cleantech Investing – Rereading this one after the cleantech exits study we just did, wow, was I on the money!
Cleantech Venture Capitalists Beware, What You Don’t Know about Energy CAN Kill you – The title says it all.