Of course, how much free supercharging will help those quarantined in the middle of the crisis is open to debate, but the gesture makes for good PR for Tesla, which still has a relatively small market in China. However, Tesla and other automakers have previously stepped up in the face of other national disasters, providing free charging to those in the paths of wildfires and hurricanes, so it's also another example of the way companies in this sector can be useful in the event of major emergencies.