Germany's solar feed-in tariff boom (2010-2012)
Generous guaranteed prices drove a rush of German solar installs, adding roughly 7 gigawatts a year at the peak. The program also drove up consumer surcharges.
Germany briefly led the world in installed solar and seeded global demand.
Berlin cut the subsidies, installs fell, but the demand had already pushed panel prices down worldwide.
It is a warning that policy support can pull growth forward and then reverse it, the risk behind the 2027 scenario for US solar.
