Tesla’s use of petroleum-fueled generators to power backup Superchargers and its customers willingness to use this carbon-emitting power source may not be completely hypocritical; the standard Harris Ranch Supercharger station does not make use of solar panels, and therefore may be nearly as carbon-intensive as a small gas or diesel generator. But it does point out how far Tesla has to go in order to live up to its initial claims about its Supercharger network.