Hmm, thats too bad about the Tesla accessory ports. I wouldn't have thought they would be so low powered. I know folks will sometimes buy the direct battery terminal connections for the Viars, bypassing the low powered accessory ports, but that isn't an option on a Tesla since the battery terminals arent easily accessed. I have had good luck with my Viars, and no issues getting my Volt tires to 42psi or my off-road truck tires aired back up after a dirt road jaunt, but maybe I will buy a different one for the Tesla. Stinks because the Viar is awesomely fast and relatively low noise.