Energy drift, meet neural networks. San Francisco-based continuous commissioning software startup Scientific Conservation has landed a $15.65 million series B round led by DFJ Growth Fund managing director Barry Schuler and with former investors DFJ Ventures and The Westly Group. SCI makes software-as-a-service that helps combat “energy drift” in building energy management systems via automatic tracking and tweaking of the systems, and has customers including Boeing, Neiman Marcus and General Electric — the latter also an investor. SCI CEO Russ McMeekin has told me and other reporters that the company will grow from 15 million square feet under management today to 100 to 150 million square feet by the end of 2011 — ambitious goals for a startup competing against giants in the field. Perhaps GE will end up being a partner as well as an investor — other building controls giants partnering or buying up startups with software that improves on building energy management include Siemens and Schneider Electric.