They seem to be counting on a 50% reduction in cost of goods sold by 2015, and a further 50% reduction by 2025, coupled with orders of magnitude increases in plant scale and secondary mechanisms (e.g. energy storage) to manage peak demand.

http://www.citizenre.com/web/index.php?p=roadmap
http://www.citizenre.net/web/index.php?p=renu

The latter page also links to a description of their plans regarding "Renewable Energy Certificates", which they seem to expect to provide a further 5c/kwh.

All this seems to suggest that their basic plans involve energy arbitrage (buy at off-peak, resell at market), clean energy generation, and high volume manufacturing.

http://www.citizenre.com/web/index.php?p=strategy