System Size | Energy/Unit Generation | System Cost Rs | Govt Subsidy Rs |
1 kWp Solar | 4 Units Per Day | 70,000 /- | 30,000 /- |
2 kWp Solar | 8 Units Per Day | 1,20,000 /- | 60,000 /- |
3 kWp Solar | 12 Units Per Day | 1,80,000 /- | 78,000 /- |
Modern solar street lights operate based on the simple principle of photovoltaic effect like traditional solar street lights. The current growth in solar energy sector aims at enhancing the performance of solar light components.
Solar Panel: solar panel: mono-crystalline or poly-crystalline. Conversion rate of mono-crystalline solar panel is much higher than poly-crystalline.
Lighting Fixture: LED is usually used as lighting source of modern solar street light, as the LED will provide much higher Lumens with lower energy consumption. Latest designs use wireless technology control for battery management. The street lights using this technology can operate as a network with each light having the capability of performing on or off the network.
Rechargeable Battery: Battery will store the electricity from solar panel during the day and provide energy to the fixture during night. There are different types of batteries: Gel Cell Deep Cycle Battery and Lead Acid Battery, Lithium-ion LFP Battery and many more.
Controller: Controller is also very important for solar street light. A controller will usually decide to switch on /off charging and lighting. Some modern controllers are programmable so that user can decide the appropriate chance of charging, lighting and dimming.
Pole: Strong Poles are necessary to all street lights, especially to solar street lights as there are often components mounted on the top of the pole: fixtures, panels and sometimes batteries. However, in some newer designs, the PV panels and all electronics are integrated in the pole itself. Wind resistance is also a factor.
Some premium street light products also integrate MPPT charge controller, advanced Battery Management System (BMS) and/or microwave sensor for a robust and extensive application.