In other words, conventional producers can produce or not produce, have high or low costs, they will never affect the renewable producer who will generate electricity as a function of the weather but regardless of market conditions. Such lack of a feedback mechanism, however, is the defining hallmark of a true, technical externality that does constitute an economically suboptimal situation. In particular, the current situation will lead to underinvestment in dispatchable technologies and thus increase security of supply risks at times of low renewable production due to unfavourable meteorological conditions.