Media Features mentions eMotorWerks in an article stating that a high penetration of renewables has started to cause resource planning issues for some states, such as California and Hawaii. Not only do grid operators have to prepare for a spike in electricity usage in the late afternoon, they also have to account for negative pricing and potential over-generation in the late morning and early afternoon -- an issue commonly known as the duck curve.

"I think the overall impact is going the be the flattening of the duck curve, but the extent to which that happens depends on how well the whole process is managed, and whether these players that are emerging in the market are going to be more or less successful," said Timotej Gavrilovic of GreenTechMedia.

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