Is the greentech industry headed for a breakout year or is it retrenching for hard times to come? The first three months of 2011 provided evidence that could support both assertions, with a big rise in venture capital investment and a big drop-off in global energy financing. Solar power remained the largest green technology sector in terms of venture capital investment, while in the world of electric vehicles, GM’s Chevy Volt hybrid and Nissan’s all-electric Leaf — the first two mainstream plug-in vehicles — hit the showroom floors in significant numbers. Meanwhile the smart grid sector’s relative dearth of VC investment was more than made up for by the massive round of acquisitions. Companies mentioned in this report include NRG Energy, Microsoft, Silver Spring Networks, Tesla and BrightSource Energy. For a full list of companies, and to read the full report, sign up for a free trial. Read more at GigaOM Pro »