Since late 90’s the use of solar panel as a source of solar power that helps convert the solar energy (HEAT ENERGY) of the sun into electrical usage, has been believed to be the best alternative for renewable and green energy, most used solar powered equipment is the solar calculator.
All hands down, solar powered systems have found love in the green world movement of today, and such technologies have extended to much more sophisticated electrical equipment, like cars, house hold powering equipment and even single heavy duty machines.
Back in the late 90’s you might fail to see the merits and opportunities solar power driven technologies has over conventional electrical powered system, but now it tends to provide better merits and benefits over other alternative source of electrical power generation e.g coal, water ,wind etc.
But with the successful implementation of the solar calculator and other high tech solar powered inventions, has given rise to a more life stylish usage of the solar power energy; which comes in place of solar panels, inverters, and batteries for home usage.

You must have seen some street lights that simply don’t go off at night, with a kind of weird pan on their head lamps like roofing. Such street light always seem to stay on every night with no signal of erratic power supply, well a good guess will be the introduction of a solar panel cell, a much more senior brother to the one used on your solar powered calculators.
Their history can be traced way back to the “photovoltaics” eras -- which were once used almost exclusively in space, powering satellites' electrical systems as far back as 1958 -- are being used more and more in less exotic ways. The technology continues to pop up in new devices all the time, from sunglasses to electric vehicle charging stations.
On record the sun's rays give off approximately 1,000 watts of energy per square meter of the planet's surface which we could easily be used by trapping it via solar panels technology and converted into solar power, the need for an Inverter and battery is to make up for the non day light hours the sun is usually out during the night.
The solar panel can be used as a component of a larger photovoltaic system to generate and supply electricity in commercial and residential applications, photovoltaic (PV) cells, which as the name implies (photo meaning "light" and voltaic meaning "electricity", these cells don't need direct sunlight to work – they can still generate some electricity on a cloudy day.
Photovoltaic cells are made up of semiconductors materials such as silicon, when light strikes the cell; a certain portion of it is absorbed within the semiconductor material. This means that the energy of the absorbed light is transferred to the semiconductor. The energy knocks electrons loose, allowing them to flow freely.
PV cells also all have one or more electric field that acts to force electrons freed by light absorption to flow in a certain direction. This flow of electrons is a current, and by placing metal contacts on the top and bottom of the PV cell, we can draw that current off for external use, say, to power a calculator. This current, together with the cell's voltage (which is a result of its built-in electric field or fields), defines the power (or wattage) that the solar cell can produce.

Each panel is rated by its DC output power under standard test conditions, and typically ranges from 100 to 320 watts. The efficiency of a panel determines the area of a panel given the same rated output - an 8% efficient 230 watt panel will have twice the area of a 16% efficient 230 watt panel. Because a single solar panel can produce only a limited amount of power, most installations contain multiple panels. A photovoltaic system typically includes an array of solar panels, an inverter, and sometimes a battery and or solar tracker and interconnection wiring.
Most solar modules are currently produced from silicon photovoltaic cells. These are typically categorized as monocrystalline or polycrystalline modules, while third generation solar cells are advanced thin-film cells. They produce high-efficiency conversion at low cost.

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The arrival of graphene will surely boost the effiency of solar panels.
Photo voltaics isnt just bread and butter,they are limitations.
Nice write up

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The solar power system is a system that converts sunlight into electricity. Solar cells are made up of two types of semiconductors, but you can try the best solar company in Lahore to avail yourself of the higher frequency panels at affordable prices. These two semiconductors are used to convert the energy from the sun into electrical energy. The solar panel consists of multiple solar cells connected together to produce an output voltage and current.