In solar hot water, the market in North America is still very small. The market in Europe today is about $4 billion a year. North America's market is $100 million, so it's 40 times difference in scale with a similar kind of population base. The market in North America is now beginning to grow at about 50% to 70% a year. It's growing, not surprisingly, in those areas with the highest cost of conventional energy—areas with the best sunshine, of course—and also in areas where government regulations, whether they be incentives or other non-barriers that can be created, incentivize the growth of the industry.
On April 27th, 2010. See this statement in context.