Poor PhotoWatt.

Blaming poor fourth-quarter revenues, due largely to the postponement of two key solar orders totaling 4 million euros, the company canceled its IPO expected this week.

Last month, ATS began offering 10.9 million shares of Photowatt at a preliminary price of between $15.00 and $17.00 per share. It extended the marketing period earlier this month. Whoops!

The full roundup of cleantech/greentech deals we saw this week:

• It was to price on Monday, but on Tuesday the planned public offering of Photowatt Technologies on the Toronto Stock Exchange was pulled because parent company ATS Automation Tooling Systems failed "to obtain the terms it wanted for the spinout." Shares in ATS immediately dropped 99 cents, or 10.43 per cent, on the Toronto Stock Exchange. The IPO has been "indenfinitely cancelled," the company says.
• Enzyme maker Diversa has priced a private placement of $120.0 million, including a $20.0 million over-allotment option. Its 5.50% convertible notes will be due 2027. Diversa intends to use net proceeds to expand its biofuels business, to fund construction of a demonstration-scale ethanol facility and for general corporate purposes. The offer is not contingent upon Diversa's pending merger with Celunol, the company says.
• Green Plains Renewable Energy of Iowa closed on a $50m credit facility that the company will use to complete the construction of its second 50 million gallon ethanol plant being built near Superior, Iowa. Farm Credit Services of America, FLCA ("Farm Credit") and CoBank, along with other participating lenders, provided the loans to the company. Construction of the Superior plant commenced in August of 2006. The plant is expected to be completed and commence operations near the end of 2007.
• Advanced Electron Beams (AEB), a company that captures the power of electron beams in a cost-effective, compact form factor, received $17.5 million in a Series B funding round led by RockPort Capital Partners, with participation from existing investors Atlas Venture and General Catalyst Partners. The funding will be used to accelerate AEB’s efforts to commercialize what it calls "one of the world’s most efficient, clean and cost-effective forms of industrial energy."
• Smart-grid technology developer Serveron announced a $5m inside round of financing. The company's investors include El Dorado Investment Company, Nth Power LLC, Cascadia Pacific Management, Oregon Life Sciences LLC, Perseus 2000 Expansion LLC, Siemens Venture Capital and Ventures West Management LLC.
• U.S. wind power developer UPC Wind secured equity financing for its Mars Hill Wind Farm in New England. Proceeds totaling approximately $44 million were funded by JPMorgan Capital Corporation and WFC Holdings Corporation (affiliate of Wells Fargo) and will be applied to reduce project debt associated with the Mars Hill Wind Farm. The Mars Hill operation began construction in the first quarter of 2006 and achieved full commercial operations on March 26th, 2007.
• Thin Battery Technologies, a Cleveland-based producer of thin, flexible, printed power source solutions, raised $6.2 million in Series A funding. SunBridge Partners led the deal, and was joined by Key Capital Corp., Orix Capital and return backer Early Stage Partners.
• Hawaii-based Hoku Materials, a subsidiary of Hoku Scientific, received a credit facility of up to $13 million from Bank of Hawaii. Hoku plans to use these funds to finance, in part, expenses related to its polysilicon production facility in Idaho, including the initial deposit of 3.1 million Euros (approximately $4.2 million) under its polysilicon reactor purchase contract with GEC Graeber Engineering Consultants GmbH, and MSA Apparatus Construction for Chemical Equipment Ltd.

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