Not only that, it's completely the opposite: One of the biggest impediments to adding more renewables to the grid is aligning generation with load. EVs are rolling energy storage devices. Put EV chargers in workplaces with a setting that says "just make sure the battery has at least 100 miles of charge by quitting time" and you get a full 300 mile charge from 100% renewable energy whenever it's available, still enough to come back tomorrow if it's cloudy today, and a discount for using the charger where that's what happens.
Then you not only charge the EVs from entirely renewable generation, most of them can curtail their load for about a week because typical EVs have around seven times the average commute in total range, and then when renewable generation is at 25% of normal, the capacity added to charge EVs can be directed to less flexible loads because the demand from EVs can be easily delayed for the right price.
Their existence is what makes a grid with a higher percentage of renewables even work.
Then you not only charge the EVs from entirely renewable generation, most of them can curtail their load for about a week because typical EVs have around seven times the average commute in total range, and then when renewable generation is at 25% of normal, the capacity added to charge EVs can be directed to less flexible loads because the demand from EVs can be easily delayed for the right price.
Their existence is what makes a grid with a higher percentage of renewables even work.