Ha ha!
G Larry asks the correct question about available effective sunshine.
I’m going to guess nobody bothered to test some prototypes at various locations in Manhattan or the other boroughs for real world energy numbers.
If the panel is a true representation it is in the range of 100-120 watts under the best of conditions. Building shadows and idling buses will limit usable sun energy, but hey Solar, the magic word.
Wonder if the cart mfr received a subsidy from Golf-1?
The one out of 500 to avoid.