Payback period of solar cells, next generation solar panel technology. Increasing solar panel efficiency. Energy generation comparison with wind power. Better insulation. Carbon emissions impact and global warming action. Government subsidies and grants, sell back to national grid, supply prices. Germany solar cell market sales future trends. Growth of solar cell manufacturing, innovation. Future of solar cells.Video by keynote conference speaker Dr Patrick Dixon, Futurist and author of 12 books on global trends including Futurewise and Building a Better Business.