Bursts of free power raise red flags for green tech investors

The UK, Italy, and Ireland are the top three markets for storage investment

Negative prices aren’t new, first occurring in Germany in 2008 as the nation ramped up wind and solar production.

Something strange is going on in Europe’s power markets. Prices keep dropping below zero.

Solar parks on Spanish plains and wind turbines above Norwegian fjords were so productive in May that a record share of clean electricity flooded the grid. At times, supply vastly exceeded demand, and producers needed to do something with all that energy.