Nantech power systems business logo


Ways to Select the Best Quality Solar Street Lights

Solar Street Lights: At the Forefront of the Green Energy Revolution

The wind, water, and sun are the three big players of Green Energy. Of the three, solar energy has grabbed global attention as an effective solution to reduce energy consumption and environmental damage.

The global shift is driven by government initiatives and a massive adoption of solar lighting systems like solar street lights. Why solar street lights? The answer is obvious. The entire world is focussing on sustainable power sources to curtail greenhouse emissions. The relentless pursuit of green power drives the need and the market growth for solar street lights. Here's the proof: Global experts say that the market for solar street lighting will reach $14billion by 2027, with a post-Covid CAGR of 14.7%.

Why are solar street lights popular?

In India, solar street lights are a common sight. Thousands of them dot the highways that criss-cross the length and breadth of the country. As dawn turns to dusk, these solar street lights come alive and flood the highways with clean, sustainable power.

Standalone solar street lights are fast gaining power for some good reasons. They are:

  • Cost-effective
  • Low-maintenance
  • Renewable energy
  • Usable even in remote areas
  • Wire and cable-free

How do they work?

Rather than relying upon on-grid power supply, solar street lights rely on batteries or photovoltaic cells for solar energy storage. This aspect makes solar street lights a feasible option to power highways and roads in remote places without any power grid source. These systems can also use the stored energy by converting it into electricity as per the requirement. For your solar street lights to function well, they must be exposed to direct sunlight, allowing them to soak up the solar energy for at least eight hours. Once charged, they are good to go for the rest of the night.

If you are looking to invest in solar street lights, it is undoubtedly a wise decision because these solar-powered solutions are fast gaining traction. The popularity of these street lights is driving the market and vice versa. The solar lighting market is flooded with dozens of options that could be overwhelming for inexperienced investors. If you are not well-informed, you may buy low-quality solar street lamps manufactured with sub-par materials.

However, our blog is packed with all the information you need to consider when investing in solar street lights. Let's read on.

11 Factors to Consider Before Buying Solar Street Lights

1.The light source

When make enquiries about solar street light dealers in Chennai for solar-powered lamp sources, they come up with several options like:

  • Energy-saving lamps
  • LED lamps
  • Induction lamps
  • Sodium lamps

Of these choices, the best option that's a close replica of the sun's spectrum is the LED light. Nowadays, smart solar-powered LED lights are powered by higher lumens that use less energy. Furthermore, LED lights make solar power integration simple and easy. So, they could be the better choice.

2.The type of battery

All solar lights are powered by batteries, which are available in two types:

  • Lithium batteries
  • Lead-acid batteries

Of the two, lithium batteries are better because they have:

  • Longer lifespan
  • Stronger resistance to temperature (upto 45 degrees Celsius)
  • Various charge and discharge times ( up to three times more than that of lead batteries)
  • Better battery capacity to provide the right lighting efficiency

It is important to note that the battery capacity should meet the lighting efficiency requirement. If not, the street lamp will not provide adequate lighting during the rainy season.

3.The temperature and latitude

When you are at a latitude greater than 15 degrees, the sun's inclination angle with the ground is greater than 15 degrees. Therefore, you must consider solar street lights with adjustable solar panels. Also, the panels of solar street lights installed on both sides of the road should not face away from the sun.

4.The heat dissipation performance

The heat dissipation is another important factor determining the LED lamp's quality. Basically, heat dissipation is nothing more than the transfer of heat. However, dissipation also refers to heat loss driven by undesirable effects. Therefore, every time the heat dissipation is inadequate, the lifespan of the semiconductor device in the street lamp is shortened. It is better to choose anti-ultraviolet and fireproof LED lights to ensure adequate heat dissipation.

5.The Illumination levels

When considering solar street lights, look for details about the footcandles as they determine the illumination on the floor. Ideally, the bright/dark ratio should be 4:1, but a minimum ratio of 3:1 is also good. You should also consider the colour temperature, measured in degrees Kelvin.

6.The temperature of the black lamp housing

It is better to opt for light coloured lamps since black coloured lamps are highly heat absorbing. If the lamp is black, the temperature of the metal shell can reach up to 90 degrees Celsius underexposure. The high temperature will destroy the battery and the LED light source. Therefore, choose a silver shell that will not absorb heat or fade when placed outdoors.

7.The controller

Charging and discharging controllers are also known as solar controllers, and they coordinate the work of solar panels, storage batteries, and loads. An effective heat dissipation function is crucial for selecting a controller. Another essential feature is temperature compensation. A smart controller has been added to prevent overcharging and undercharging of solar batteries. You would be better off investing in a smart solar controller with built-in communication that allows real-time monitoring and control of the system. The controller would offer maximum performance and longevity.

8. The sensors

The sensors are of two types:

  • Microwave induction ( can sense moving objects)
  • Infrared induction (detect only temperature-bearing organisms)

The PIR or the Passive Infrared Sensor is included in many solar street lights to help conserve energy. The sensors work by measuring infrared light allowing the sensor to detect movement.

9. The solar controller

The solar controller coordinates the work of the panels, loads, and batteries. Hence it is essential to pick a controller which gives you the following benefits:

  • Good heat dissipation function
  • Temperature compensation
  • Prevention of overcharging and undercharging
  • Built-in communication with interactive control
  • Real-time system monitoring
  • Maximum performance and longevity

10. The solar panel

The solar panel is the main component of the solar street lighting system. To determine the quality of the solar panels, you should:

  • Check for even distribution of the silica gel around the back, backplane and frame.
  • Examine the string welding for leakage regularity of the cell arrangement.
  • Examine the pressure quality on the back and check for irregularities like bubbles and wrinkles.
  • Check the battery panel's tempered glass surface for any foreign matter.
  • Ensure that each battery cell is complete and created through integral cutting.

11. Service and warranty

Solar street lamps are certainly a big investment. Hence you need to ensure the manufacturer offers an extended warranty period of 20 to 25 years. Also, look for reputable solar street light dealers that offer good after-sales services.

Choosing Between Various Types of Solar Street Lights

  • When choosing solar street lights, it is also advantageous to know the various models available on the market.
  • Solar pole lights

In this model, the solar panels are attached to the poles. This panel positioning is slightly disadvantageous because the sunlight effect is minimal, and the absorption effect is only one-fifth of the ordinary solar lights. Moreover, the absorption rate is almost nil when the sun is directly above.

  • Solar and wind energy hybrid street lights

The conversion equipment is different in this model because the conversion mechanisms are different. If wind energy is used to charge the battery, it will cause decay and affect the battery life. Hence, this model may not be the right choice if you are looking for solar lights that will last a long time.

Get the Nantech expertise and guidance on solar street lights.

Nantech Power Systems Pvt Ltd are one of the most recognized solar street light dealers in Chennai. We have years of experience dealing with off-grid and on-grid solar power plants and street light installations. Want to power up your locality? Call us today.

The Modern Trends in Solar Street Lights

Advancing into a sustainable world, there has been a paradigm shift globally onto the usage of solar-powered products. Solar street lights are the emerging renewable light sources for our streets. They use photovoltaic (PV) panels or commonly called solar panels for the conversion of solar energy into electrical energy.

Components and types of solar street lights

Many types of solar street lights are manufactured based on different types of each component.


  • Solar panel /PV:

Firstly, panels are available for various wattage systems starting from a minimum of 8W. Two types of panels of conversion are available, namely, mono-crystalline & poly-crystalline. Monocrystalline panels have higher conversion rates.

  • Lighting fixture:

Smart solar lights use LED lights against fluorescent lamps as they consume lesser energy, are highly luminous and save capital. The Government of India runs the world’s largest streetlight replacement programme called LED Street Lighting National Programme (SNLP). The Greater Chennai Corporation has switched to LED lamps for street lights which is helping them save about 30Cr annually!

  • Pole:

The pole needs to stand strong for climatic variations like rain and wind resistance. Usually, the pole has attached to it, the lamp, PV and additional accessories, if any. Nantech provides durable and corrosion resistant poles with an alluring look.

  • Battery:

A battery is rechargeable during the day. It is meant to store the electrical energy which is converted from solar energy by the PV and is used during the night. Energy can be stored to work as a backup on cloudy or rainy days, thus making the lifetime of a battery crucial. While the gel cell deep cycle batteries & lead-acid batteries are common, the lithium-ion batteries are an emerging trend because of their higher lifetime of about 5 years.

Novel Features Of Solar Street Lights

  • Not only are they environmentally friendly products, new features can save a great deal of energy and bills as well.
  • Most products today have an automatic controller which switches on the street light when the sun (or a bright light source) is not detected and gets dim or switched off accordingly in the day.
  • There is a feature of dimming of lights in some smart products today when no movement is sensed about 4-10 metres around the street light. (motion sensor)
  • The best kind of products need low maintenance costs, easy and quick installation, all of which is covered by Nantech for its customers.


  • The Government of India targets to install solar renewable energy sources producing at least 100GW energy up till 2022. It includes solar street lights, solar panels for domestic use besides mega solar projects. Tamil Nadu is one of the five leading states for utility-scale solar projects.
  • The market got hit due to covid crisis but with government initiatives and advanced product features, the demand is ever increasing.
  • It is observed in the regional market trends that developing countries like India are preferring solar lights as part of rapid urbanization and smart cities development. They are suitable for cities like Chennai with sunny weather where frequent power cuts are experienced, best installed at locations where electric supply reach is inadequate.

Solar street lights can be used for residential, commercial as well as industrial purposes. The appealing and substantial benefits of switching to cleaner and greener energy resources has struck people around the world! Do check out our products at Nantech Power Systems Pvt Ltd.

Normal Street Lights vs Solar Street Lights

Solar Energy is now taking the world by storm. We can see this in the many advancements in technology by our Indian scientists and by the Indian Government's proactive legislatures. In 2018, the Chennai Civic Body had launched a Rs. 140 Crore venture project which plans on changing 70000 streetlights in over 15 zones, out of which 8 zones – Thiruvottiyur, Manali, Madhavaram, Ambattur, Valasaravakkam, Alandur, Perungudi, and Sholinganallur are all going have 17000 redone post lamps with streetlights introduced. Estimates are that this project could bring a 45% lessening in electricity consumption.

The focus is now on more greener and efficient technologies like solar streetlights, which use solar panels and LEDs. But why must you change over to Solar Street Lights? We shall present you with 5 compelling arguments to switch over to Solar Streetlights in Chennai!.

Solar Street Lights

Conventional Street Light


Quick, cheap, and easy to install, the poles are also powered by PV panels which provide electricity to LED lamps, with an inbuilt controller and battery.


These require much cable-laying and trenching required, which in turn means a large workforce and also a requirement of storage for heavy-duty batteries.


Since solar energy is converted to electrical energy, there is no additional electricity cost. A battery can fully charge itself within 5 hours and then run for the next 12 hours. It is also weatherproof and dustproof, and rainy days aren't a problem. They are operational for the next 5 years.


The batteries need a lot of maintenance, including timely water topping, which increases labour costs. Since they are connected to an electric supply, street maintenance with a high electricity cost is quite difficult.


These are wireless and not connected to any electricity cables; hence there are no protruding wires and no accident threat.


Since there is much cabling involved, it is very unsafe as one can get electrocuted from the direct supply of electricity. There is also an additional threat of strangulation during the installation process. There is a possibility of a short circuit.


There is no energy cost since energy from the sun is directly being used. Since it uses green energy, there is no carbon footprint associated. There is also less light pollution since the lens used is of a special kind that adjusts brightness levels based on battery voltage and running times, thus reducing the light pollution and increasing the backup battery time.


These are connected to power grids, which are non-renewable energy sources and hence pollute the environment as a lot of carbon dioxide is released. Conventional Sodium or Metal Halide lamps also use mercury, which is very toxic to the environment. Light exposed sideways could lead to light pollution.


The LEDs in the poles are coloured to reach the desired CRI that resembles the daytime sun. Hence the visibility is better at night and similar to that provided during the day.


The yellow lights from the halide and sodium lamps are low in Colour Rendering Index (CRI), making it difficult to see and distinguish in colours. The glare from these lights can also be a cause for accidents.

Solar Street Light - Manufacturer in Chennai Shows Its Powers!

Solar Street Light Dealers in Chennai Explain the Recent Interest in Solar Street Lights!

Solar power is one of the cleanest and most sustainable sources of electrical energy! It especially makes sense to go for it in places like Chennai where there is no shortage of bright sunlight. Thus, a considerable number of industrial establishments, residential townships and gated communities in the city are now turning towards solar powered street lights to light up their private roads and thoroughfares!

Also Read: Why Is It A Must To Invest In UPS or Inverter in Chennai?

Find Out How Solar Street Lights Work - From One of the Best Solar Street Light Dealers in Chennai!

Solar street lights are typically LED-based self-illuminating devices. A solar street light usually contains a photo-voltaic (PV) system that converts solar energy from sunlight into electrical energy and stores it in a self-contained battery unit.

As the day comes to a close, the voltage in the PV unit falls, triggering the battery on and making the LED light glow. The street lights burn the brightest during the first few hours of the night. But as daybreak approaches, the intensity of the light reduces gradually and shuts off completely when there is enough light to get the PV module going again.

Some solar street lights have motion sensors to glow brighter when people are about while remaining at optimal brightness the rest of the time.

The Many Benefits of Solar Street Lights in Chennai!

Energy Efficiency

This is probably the single main USP of solar street lights! They do not need to draw on the power supply from any grid as they are standalone, self-contained units. Since they have sensors to trigger automatic on/off and dimming of lights based on the availability of natural light, they do not use any more power than what is required for lighting up our streets.

Independence From Grid

As we saw earlier, solar-powered street lights do not depend on any electricity grid to function. So, they are not affected by any power disruptions in the power network either. Thus, if there is a power blackout in an area, the street lights would still be on.


No more messy wires hanging from electric lamp poles because solar street lights are compact independent units that do not need to be interconnected with each other. Since the battery is usually sealed into the PV unit itself, these lights are virtually wireless!

Illumination in Remote Locations

Since solar street light are off-grid, they are ideal for illuminating remote locations which do not have access to the local power grid. They need to be just transported and installed in the required spots without any significant complications.

Green Energy

Solar street lights are incredibly gentle on the environment with hardly any carbon footprint. What is more, they are highly sustainable and 100% pollution free.

So, what are you waiting for? Get a quote from the best dealers of these “wonder” lights in the city, do a comparative study of solar street light price in Chennai and start lighting up your neighbourhood!

Copyright © 2024 Nantech Power Systems Pvt Ltd. All Rights Reserved.