Solar panels are attached to an aluminum mounting system, which is secured to the roof (typically directly to the rafters). Solar cells can also be integrated directly into the roof tiles – this is more suitable for new builds than retrofits. When the sun shines, the panels will generate direct current (DC) which flows into a box called an inverter to create an alternating current (AC) – AC is used by the appliances in your home / building. Note that the panels work best in sunlight; however they will still generate some energy when it is overcast using ‘diffuse sunlight’. The AC flows from the inverter into the fuse box.