Photovoltaic systems, more commonly known as PV, are the installation required to produce electricity from use of the sun rays. Solar PV panels are either monocrystalline or polycrystalline cells. Once sited, the energy the cells produce from the sunlight is DC current. Therefore an inverter is required to transfer the elecricity to usable AC current. A meter is installed, as energy that is not used by your own appliances can be sold back to your energy supplier IN ADDITION to claiming the feed-in tariffs (FITs).
An alternative is to have an off-grid or SMA battery backup system, which works in a similar way, but the energy SMA Battery Backup System produced is stored in batteries for use when required. This is ideal in rural locations or where there is no direct connection or loss of an electricity supply. FITs are also available for these types of systems, but at a lower rate paid per Kw than grid connected systems. Now these incentives are in place there has never been a better time to earn money to contribute towards the cost of your system. Due to this Clean Energy Cashback scheme, grants are no longer available as a lump sum to assist you with costs of the installation. This system is monitored by SMA sunny portal.
More information here.