Industrial Applications

The examples are powering repeater stations for microwave, TV and radio, telemetry and radio telephones.Solar energy is also frequently used on transportation signalling e.g. offshore navigation buoys, lighthouses, aircraft warning lights on pylons or structures, and increasingly in road traffic warning signals. Solar is used to power environmental and situation monitoring equipment and corrosion protection systems (based on impressing a current) for pipelines, well-heads, and bridges or other structures. As before, for larger electrical loads it can be cost effective to configure a hybrid power system that links the PV with a small diesel generator.

Solar's great benefit here is that it is highly reliable and requires little maintenance so it's ideal in places that are hard to get to.

City Residential homes

Water Pumping, lighting, heating in the Developing World

solar lights(fluorescent lamps)

Solar Power is frequently used in consumer product applications which require small amounts of energy (like calculators). Another frequent use is for Recreation Vehicles (RVs) and Boating to recharge the battery for recreational use activities.

Commercial buildings
Solar water heating systems

Solar Charger for Mobile Phone
Solar Backpack
solar wall lamp

PV APPLICATIONS
PV is used worldwide in many applications, from niche markets in developed countries to primary village power in rural economies and developing countries. The following links will provide information on some of the major applications areas where PV plays, or will play, a major role.
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Remote Residential
Around the world, there are more than 100,000 off-grid residential PV systems, as of 1996, including tens of thousands of vacation homes in Scandanavia. These systems, typically from one module to one kilowatt, comprise the PV modules, batteries, charge controllers, and assorted loads (lights, radio/TV, refrigerator).
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Village Power In developing economies, there are hundreds of thousands of villages that currently have no access to electric power or that use diesel generators, which are expensive to fuel, difficult to maintain, and environmentally harmful. PV village power systems provide electricity for domestic, community, or industrial activities. PV can also be used with diesel generators as part of hybrid systems. 
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General Stand-Alone Systems (Lighting, Cathodic Protection, etc.)
Photovoltaic systems can supply electricity in areas where there is no electric grid, or where connecting to that grid would be too expensive.

Water pumping: PV systems can replace hand pumps or large engine-powered water pumping systems. In many pumping systems, no batteries are required, as the pumped water storage provides that function.

Cathodic protection: Metal corrosion causes damage to pipes, tanks, well heads, wharves, bridges, and buildings. PV-generated electricity prevents electrolytic corrosion of such structures.

Communications: PV systems have been powering remote communications systems, such as microwave repeaters, television and radio transmitters and receivers, telephone systems, and small radios, since the mid 1960s. These systems provide reliable, low-maintenance power for these remote systems.

Lighting and small appliances: PV can be used to light homes, operate TVs and radios, or power street lights. In the developing world, improving indoor lighting allows small industry to expand, replacing kerosene lanterns and improving indoor air quality. --------------------------------------------------------------------------------------------------------------------------------------------
Building-Integrated PV (BIPV)
Integrating PV into building structures holds the promise of extensive market penetration in developed countries, replacing conventional facade and roofing materials and avoiding the cost of support structures. These systems include crystalline modules integrated into roofing systems and used as 'eyebrows' over windows, and glass-on-glass modules used in skylights and view walls; and amorphous silicon modules, both opaque and semi-transparent, used in curtin wall systems.

Utility Systems
Utilities are using PV in many applications, including large centralized generation, transmission and distribution support, demand-side management, distributed residential and commercial systems, and remote, stand-alone monitoring systems.

Demand-side management (DSM) systems have particular value because they produce power for the grid at the times of the utility's peak demand (when power is the most expensive.

Transmission and distribution support has value because utilities can install PV near substations or at the end of overloaded lines, eliminating or delaying the need for costly upgrades. 
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Hybrid Power Systems
Hybrid systems typically include some combination of PV, wind, and diesel generators, along with controlling electronics and battery storage. The reasons for these systems include making maximum use of the available resources (wind and sun), serving critical loads (telemetry and communications), and supplementing existing equipment (reducing the duty cycle of an existing diesel generator).
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Consumer Product Power
Most solar-powered consumer products (calculators, etc.) use very small amorphous silicon PV devices to provide the power necessary for their operations.
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Space Power Systems
Photovoltaic systems have been used to power satellites and space probes since the Vanguard I launch in 1958. The critical issues in space power systems are weight and reliability: weight, because of the high cost of boosting equipment into space; and reliability, because servicing a system is difficult (impossible, until recently) and expensive. Because these issues are more important than cost, the technologies are typically more exotic than those used in terrestrial systems