Our time-lapse systems run off solar or 240V mains power. If its an outdoor project or event, a solar panel will be used to keep the internal battery topped up and is included in the price of the system (unless 24hr image capture, at low interval rates is required where alternative power options may need to be considered). If we are setting up indoors then we will require access to a 240v power outlet within close proximity to the camera unit or within a distance that can be reached by a standard length power cord.