In California, recently approved NEM3 makes people involved in the energt market - paying or earning rounded rate for that specific hour. Few hours during summer months can earn you $1-2 per kW, so single discharge of EV at that time would earn you $100-200, easily outweighing the cost of degradation.

New rule has been strongly criticized about being more costly and disentivizing solar, but the one thing it does right, is insentivizing end users to do a propertine shifting of their usage.