This depends on how much power you use. Even if you a re a high user of electricity, you can dramatically cut your energy use by being Energy Smart, which in turn would require a smaller more affordable system for your home. Also, you don’t need to install enough panels to power the whole house if you live on grid electricity. You could, for instance, buy as many panels as you can afford (and add on later), and buy Accredited Green Power for the rest. A solar panel has an area of 1.35 square metres, and a Grid Connect System will take up a minimum roof area, starting from about 8 square metres. We can design a system to meet 100% of your electricity needs, or to the size or budget you require.