Aputure has put out a video entitled, How to Shoot on Location Without Electricity. Essentially it shows you how to use LED light sources that can run via you rechargeable v-mount batteries, generators, and a compact mobile battery like the Aputure Delta Pro, powered by EcoFlow.
In the video, Aputure shows you how many lights can run off of this single power source, so you can correctly gauge how many lights and batteries to bring on your next production. It also highlights the advantages of using alternative power sources over a generator.
While everything being shown in this video is made by Aputure, you could easily substitute the equipment with options from other manufacturers.