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The Boston Globe

Business

Clean-tech backers slow their approach to growth

After receiving tens of millions in taxpayer dollars in 2009, Waltham battery maker A123 ­Systems Inc. ramped up quickly, ­ultimately increasing production much faster than the electric vehicle market grew. The result was bankruptcy and the purchase of A123’s assets by a Chinese company on Tuesday.

The next day, another alternative energy firm that won tens of millions in government support opened a pilot plant in Bedford. But this plant was completely ­financed by private investors, and the company, solar component maker 1366 Technologies, has agreed not to tap its $150 million in federal loans until it proves its technology can succeed.

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