Tesla will reveal its semi this Thursday, and Musk promises to 'blow your mind'
I actually think the math really works out well for semis given you can burn through your battery lifespan super quick. Let&#x27;s say you take two 15 minute breaks + 30 minute lunch per day. That is 1 hour of charge time. Assuming you start from full battery and a 2% per minute supercharge rate (~what wikipedia has for the model s) that gives you an extra 120% battery.<p>1.9kwh per mile and driving 600 miles per day and you can get away with a 400kwh battery. Less actually but my understanding is you want to not charge to 100% for maximum lifespan. Not sure the optimal cost trade offs...<p>7 cents per kilowatt hour * 1.9 * 600  = ~$80 a day vs 
$2.7 a gallon * 600&#x2F;6(mpg) = $270 a day<p>$150&#x2F;kwh for battery with 2000 full cycles is $85 dollars a day without interest(only ~2 year lifespan so w&#x2F;e and presumably has some residual value also not taken into account)<p>Seems to work out to about $100 a day in savings?? I feel like I must be off on numbers somewhere. Data on number of cycles doesn&#x27;t seem to be particularly consistent.