A setting sun used to mean that Ruby Kumari had to close the doors to her home-made sewing school in Parsa, a village in the eastern Indian state of Bihar.
But the arrival of solar-powered minigrids in 2019 allowed her to stay open after sundown and offer additional classes, more than doubling enrolment to 80.
Access to affordable, reliable power also meant she could switch from manual to electric sewing machines, helping her transform her skills into a new business activity in 2020 when the COVID-19 pandemic put her teaching work on hold.