Guaranteed payments for renewable energy, known as "feed-in tariffs" or FITs, have been the most successful means of getting a lot of renewable energy online in a short amount of time. FITs have been very successful in Germany, Italy, Spain and other countries around the world. The basic idea is that utilities must buy power from a renewable energy project at a price set by energy agencies. This price represents enough support and certainty to encourage rapid development of renewables. And we need rapid development of renewables for a variety of reasons.