Stand-alone photovoltaic power systems are electrical power systems energised by photovoltaic panels which are independent of the utility grid. These types of systems may use solar panels only or may be used in conjunction with a diesel generator or a wind turbine.
Grid-connected photovoltaic power systems are power systems energised by photovoltaic panels which are connected to the utility grid. Grid-connected photovoltaic power systems comprise of Photovoltaic panels, MPPT, solar inverters, power conditioning units and grid connection equipments.
Summarising different PV technologies: mono crystalline solar, thin film, dye sensitised, poly crystalline solar for performance, construction, appearance, efficiency, weight etc.
With pioneering works of Dr. Gratzel and Dr. Heeger, it has now been made possible to “recycle electrons” emitted from conventional lighting sources. This technology makes it possible to have indoor PV and use our current lighting to generate electricity.
Thin film photovoltaic solar panels convert sunlight to electricity like C-Si & A-Si PV panels, but they are typically thinner and more flexible. Generally, the semiconductor layers on thin film solar panels are only a few millionths of a meter thick, although the name “thin film” comes from their production process and not from thickness.
It is the most common type of technology used nowadays for panel manufacturing. Solar panel are made of crystalline silicon solar cells. Due to extensive research and thorough understanding of this technology, it has become one of the most widely used technology wordwide. The panels have better efficiency than others and so offer more power per unit area Rapid reduction in Silicon costs have led to huge price drops in solar PV panels and makes it cheaper and affordable.
a-Si has been used as a photovoltaic solar cell material for devices which require very little power, such as pocket calculators, because their lower performance compared to traditional c-Si solar cells is more than offset by their simplified and lower cost of deposition onto a substrate.