A  solar-powered water pump  is a pump running on electricity generated by photovoltaic panels or the radiated thermal energy available from collected sunlight as opposed to grid electricity or diesel run water pumps. Solar powered water pumps  can deliver drinking water as well as water for livestock or irrigation purposes.Solar water pumps may be especially useful in small scale or community based irrigation, as large scale irrigation requires large volumes of water that in turn require a large solar PV array. As the water may only be required during some parts of the year, a large PV array would provide excess energy that is not necessarily required, thus making the system inefficient. The purpose of the controller is twofold. Firstly, it matches the output power that the pump receives with the input power available from the solar panels. Secondly, a controller usually provides a low voltage protection, whereby the system is switched off, if the voltage is too low or too high for the operating voltage range of the pump. This increases the lifetime of the pump thus reducing the need for maintenance.

Solar street lights  are raised light sources which are powered by photovoltaic panels generally mounted on the  lighting  structure or integrated in the pole itself. The photovoltaic panels charge a rechargeable battery, which powers a fluorescent or  LED lamp  during the night. These lights provide a convenient and  cost-effective  way to light streets at night without the need of AC electrical grids for pedestrians and drivers. They may have individual panels for each lamp of a system, or may have a large central solar panel and battery bank to power multiple lamps. Most solar panels turn on and turn off automatically by sensing outdoor light using a light source. Solar streetlights are designed to work throughout the night. Many can stay lit for more than one night if the sun is not available for a couple of days.

A  rooftop solar power , is a photovoltaic system that has its  electricity-generating solar panels mounted  on the  rooftop  of a  residential or commercial building or structure . Rooftop solar  is increasingly cost-effective for home owners, business owners, and their communities. Reductions in technology prices, innovative financing, and growing networks of solar installers and financial partners all helped drive down the prices for household systems Many home owners and businesses are taking advantage of third-party ownership options. Under solar leases or power purchase agreements, electricity customers typically pay little or nothing up front for rooftop systems, then get electricity from the systems over a long period at attractive fixed rates. The systems (and maintenance responsibilities) remain the property of the project developers, which may be private companies or electric utilities themselves. Rooftop solar  may have been the fastest-growing segment within India's renewable energy sector last year.

A  solar-powered water pump  is a pump running on electricity generated by photovoltaic panels or the radiated thermal energy available from collected sunlight as opposed to grid electricity or diesel run water pumps. Solar powered water pumps  can deliver drinking water as well as water for livestock or irrigation purposes.Solar water pumps may be especially useful in small scale or community based irrigation, as large scale irrigation requires large volumes of water that in turn require a large solar PV array. As the water may only be required during some parts of the year, a large PV array would provide excess energy that is not necessarily required, thus making the system inefficient. The purpose of the controller is twofold. Firstly, it matches the output power that the pump receives with the input power available from the solar panels. Secondly, a controller usually provides a low voltage protection, whereby the system is switched off, if the voltage is too low or too high for the operating voltage range of the pump. This increases the lifetime of the pump thus reducing the need for maintenance.

Solar street lights  are raised light sources which are powered by photovoltaic panels generally mounted on the  lighting  structure or integrated in the pole itself. The photovoltaic panels charge a rechargeable battery, which powers a fluorescent or  LED lamp  during the night. These lights provide a convenient and  cost-effective  way to light streets at night without the need of AC electrical grids for pedestrians and drivers. They may have individual panels for each lamp of a system, or may have a large central solar panel and battery bank to power multiple lamps. Most solar panels turn on and turn off automatically by sensing outdoor light using a light source. Solar streetlights are designed to work throughout the night. Many can stay lit for more than one night if the sun is not available for a couple of days.

A  rooftop solar power , is a photovoltaic system that has its  electricity-generating solar panels mounted  on the  rooftop  of a  residential or commercial building or structure . Rooftop solar  is increasingly cost-effective for home owners, business owners, and their communities. Reductions in technology prices, innovative financing, and growing networks of solar installers and financial partners all helped drive down the prices for household systems Many home owners and businesses are taking advantage of third-party ownership options. Under solar leases or power purchase agreements, electricity customers typically pay little or nothing up front for rooftop systems, then get electricity from the systems over a long period at attractive fixed rates. The systems (and maintenance responsibilities) remain the property of the project developers, which may be private companies or electric utilities themselves. Rooftop solar  may have been the fastest-growing segment within India's renewable energy sector last year.