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Thank you for pointing out the typo. Based on my own experience reading LCAs and the convention used in the Alsema and Fthenakis paper cited in this article, I am confident units of energy (MWh) is the more appropriate unit of measurement. To use units of power (MW), you would need to first find the energy required to construct and maintain the technology (in MWh), and then average this out over the lifetime of the technology. This seems to be a very convoluted way of communicating energy payback. Anyway, to summarize the units should be in MWh.[[User:Nate Preston|Nate Preston]] 03:21, 27 April 2010 (UTC)