The grid, or National Grid, is a privately owned network of electricity supply lines that stretch from the power stations where the electricity is generated to the homes and businesses where it is used. In some parts of the UK, local or domestic microgeneration may make it feasible to live "off grid", while some homes in remote parts of the country have no choice because it does not reach them. In some cases, microgeneration means there is potential for people to sell surplus electricity back to the grid.