Is a rollup wave coming?

Cleantech companies will be looking for market share in 2009.

Despite record high investment in the cleantech sector -- $4.1 billion in 2008, up from $1.4 billion in 2006 -- the credit market contraction has severely tested the sector with the usual sources of financing for large-scale solar, wind and alternative fuels projects -- tax equity investors -- taking a pass.

Valuations of privately held cleantech companies have come down significantly from 2007 and even 2008 levels, and the initial public offering window is still effectively shut for these players.

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