Simply put, "net-zero" is the process of end-using – or “netting” – zero fossil fuels. To achieve net zero, a home must have the ability to generate power (typically through photovoltaic solar cells), and must consume the equivalent or less of what it generates. Most net zero homes today remain connected to the local power grid, such that they may feed surplus electricity back to world, and likewise obtain power during long stretches of cloudy weather. At the end of the day, you’re running a fair and balanced operation (with no oil or natural gas expenses, to boot)!