Battery swap stations will have the ability to return power to the grid . With some estimates there could be enough power to light 200 houses. Ev batteries can be charger during non peak hours and can send energy back to the grid as in some cases electricity during peak usage the cost more than doubles to charge a battery, The swapping battery station has the ability to upload the electricity back to the grid as as an additional source profit and serve as a back up to the electrical grid in case of natural disasters.
With the 1000 of Nio battery swapping stations and other Battery Swap Stations are able to send the surplus energy back to the grid from EV Batteries and Solar Collectors. Nio has significant investment in solar power equipment and electrical grid conversion equipment that could transfer this knowledge to other companies wanting to send power back to the grid.