"Your claim of batteries powering a gigawatt scale grid for two days does not pass the smell test." What smell test? What doesn't specifically sound right? I

"Your claim of batteries powering a gigawatt scale grid for two days does not pass the smell test." What smell test? What doesn't specifically sound right? I might have miscalculated of course, 50M cars x 50kwh = 2500Gwh = 2.5Twh Germany Electricty usage: 561,8 Twh/ year -> /365 = 1.54Twh / day So two days ~3TwH, Battery capacity ~2.5Twh I would be interested in any corrections, especially as you are a renewable energy researcher and I'm just a coder.