The rising adoption of intermittent renewable energy in recent years has led to an increasing mismatch between electricity demand and supply.
Within the course of a single day, electricity prices are subject to significant fluctuations. As can be seen in the chart on the right, on April 22 2019 the price of one MWh in Germany varied between €25 and -€80. With variable prices and shiftable loads, consumers could have benefitted from these price fluctuations.