Solar Street Light System in Nepal

Solar Street Light System in Nepal-Trade Nepal

Solar Panel: -The Solar panel is one of the most important parts of a solar street light, as the solar panel can convert solar energy into electricity that the lamps can use. There are two types of solar panels commonly used in solar streetlights: monocrystalline and polycrystalline. The conversion rate of mono-crystalline solar panels is much higher than their poly-crystalline counterparts. Solar panels also vary in wattage systems.

Lighting: -LEDs are usually used as the primary lighting source of modern solar streetlights, as the LED will provide much higher luminosity with lower energy consumption. The energy consumption of an LED fixture is at least 50% lower than the HPS fixture counterpart which is widely used as the lighting source in traditional streetlights. A lack of warm-up time in LEDs also allows for use of motion detectors for additional efficiency gains.

Rechargeable Battery: -Batteries will store the electricity generated by the solar panel during the day and provide energy to the fixture during the night. The life cycle of the battery is very important to the lifetime of the light and the capacity of the battery will affect the backup days of the lights. There are two types of batteries commonly used in solar-powered streetlights- gel cell deep cycle batteries as well as lead acid batteries. Lithium-ion batteries are also popular due to their compact size.

Pole: -Strong poles are necessary to all streetlights, 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. In addition, accessories do exist for these types of poles, such as a foundation cage and battery box.

Type: -Solar streetlight at the bus stop, Each street light can have its own photo voltaic panel, independent of other streetlights. Alternately, a number of panels can be installed as a central power source on a separate location and supply power to a number of streetlights.

All-in-one type solar streetlights are gaining popularity due to their compact design which incorporates all of the parts necessary in a compact manner including the battery. The city of Las Vegas, Nevada was the first city in the world that tested new Solar Street lights which are coupled with kinetic tiles that produce electricity when people walk over them.

Advantages: -Solar streetlights are independent of the utility grid. Hence, the operation costs are minimized. Solar streetlights require much less maintenance compared to conventional streetlights. Since external wires are eliminated, risk of accidents are minimized.

Electricity produced from solar panels is non-pollutive. Separate parts of a solar panel system can easily be transported. Energy costs can be saved.

Disadvantages: -Initial investment is higher compared to conventional streetlights. Risk of theft is higher as equipment costs are comparatively higher. Snow or dust, combined with moisture can accumulate on horizontal PV-panels and reduce or even stop energy production. Rechargeable batteries will need to be replaced several times over the lifetime of the fixtures adding to the total lifetime cost of the light. The charge and discharge cycles of the battery are also very important considering the overall cost of the project.

Street light Description per set

• pole galvanized -8 meter
• solar Panel -200watt
• Battery – Lithium ion PO4-82Ah
• charge Controller- 15 AH (Dusk to Dusk)
• streetlight – 40 watts
• Frame, Wire & accessories
• Transportation and Instalation Extra 
• warranty – Manufacturer Defect
• Delivery Fitting: Extra