Is there evidence that batteries as a system are more vulnerable to EMP than the current electric grid? More so, is there evidence that EMP is a viable threat?

Is there evidence that batteries as a system are more vulnerable to EMP than the current electric grid? More so, is there evidence that EMP is a viable threat? Ensure the battery grid has the same uptime or better than the current grid and call it a day. Also, thank you for the reminder of the guidelines: "Please respond to the strongest plausible interpretation of what someone says, not a weaker one that's easier to criticize. Assume good faith."