Best blog about outdoor & garden solar light
Due to the rising energy prices and the development of new renewable energy technologies, solar LED (light emitting diode) lights have been very popular in the past decades. Therefore, the most widely discussed industry issue is the comparison of grid-connected traditional street light and solar light. When weighing each aspect of the argument, it actually depends on your personal point of view, which type of lighting system is more suitable for your needs. Do you want to reduce your electricity bill to zero, or do you want to avoid the maintenance costs of replacing and repairing sodium lights? Are you considering installing a new pole in a location without a grid and want to avoid the high cost of trenching and wiring? Or do you choose to keep the AC infrastructure intact and avoid long-term investment in solar lighting? If you have a chance to see a nearby standard street lights failing, occasionally flashing, or wondering why solar street lights are not installed in every corner, stay tuned to see the main differences between the two.
How do solar and traditional street lights work?
Solar street lights can provide lighting without standard electricity. They are not connected to the grid infrastructure, but are completely independent or off-grid. Photovoltaic modules or solar panels harvest sunlight during the day and convert it into energy, which is then stored in dedicated battery systems. The solar charging controller is the core component of the lighting system, which can adjust the storage capacity of the battery and ensure a longer life cycle. At night, stored energy is allocated to the power of LED lighting. Traditionally or traditionally (metal halides or high-voltage sodium) street lights generate electricity from standard grids, which generate energy from fossil fuel (non-renewable) sources.
Renewable Energy and Environmental Impact
Solar street lights are based on sustainability and have very little impact on the environment because they use unlimited renewable energy sources that are economical, safe and environmentally beneficial. Solar lighting system supplements solar energy every day and does not produce harmful carbon dioxide emissions.
You may want to know the opportunity cost of not using more renewable energy to make up for our energy consumption. For example, the amount of sunlight hitting the Earth¡¯s surface in an hour is enough to cover global energy consumption throughout the year. Covering Spain¡¯s equivalent land area with solar panels generates enough energy to power the entire world. Using electricity to drive traditional outdoor lighting can lead to carbon dioxide production. For example, if the global traditional street light is changed to solar street light, this will reduce global lighting power consumption by more than 52%, and reduce carbon dioxide by 735 million tons per year.
Lighting and lighting efficiency
Solar street lights use new LED technology to provide brighter light and reduce energy use. Compared with traditional style lights, LED lights with fewer wattages are more efficient, help to reduce energy consumption and provide higher luminosity. LED luminaires are also less prone to failure, with an average working time of 50,000 hours, while traditional street lights have a working time of 5,000 to 8,000 hours and a higher failure rate.
Metal halides or high-pressure sodium lights provide much lower CRI (color rendering index), while LED lights can be colored to match almost any CRI with better visibility and multiple distribution patterns. These changes have led to an increase in the use of LED lights to transform traditional old street lights.
Cost comparison between traditional street light and solar street light
If we only consider the purchase price, the initial investment in off-grid solar LED street lights is usually twice as high as that of traditional street lights. However, over a 10-year period, the cost of traditional street lighting installation, maintenance and electricity per unit ranged from $7,000 to $8,000, while the cost of solar street lighting was estimated at $3,500 to $5,000 over the same period.
If new installations are carried out in remote areas, traditional street lights require wiring and trenching to connect to grid lines, resulting in huge additional costs, while off-grid solar street lights are simpler ¨C Plug and Play solutions. For comparison, a foot of wiring and trenching costs $50. Depending on the location of the transformer, your project requires at least 20 feet of wiring and trenching. These operations cost an additional $1,000, offsetting the higher initial price of solar lighting systems only by looking at installation costs.
The maintenance costs are another issue. 33% of all European street lights still use standards developed in the 1930s, which require expensive on-site maintenance and large resource allocation. According to a pilot study at the North American city level, considering 190,000 traditional street lights, and given the five-year life of sodium bulbs, the cost of replacing and maintaining each bulb is $330, which means an average of 38,000 lights per city per year. The total maintenance cost of this activity is $12.5 million per year.
On the other hand, solar street light customers encounter difficulties in battery replacement costs in every five years (estimated at around $600 per pole) and performance reliability, which are mainly affected by weather conditions (solar power). Whatever the weather conditions and the location (shadow) involved, there is full autonomy of the solar street lighting system, which is one of the most critical issues currently being solved by the industry. Solar energy transformation is another part that needs further improvement to achieve market economies of scale.
Introducing Intelligent Technology into Traditional Street light
LED renovation is a necessary action to improve traditional street lights, while the capital cost of maintaining AC infrastructure intact is zero. The power grid is still the most reliable source of electricity, and adding intelligent technology to the system can provide benefits through energy efficiency, monitoring and management of each streetlight unit.
Introducing Intelligent Technology into Solar Street light
In recent years, solar power generation costs have fallen sharply, especially after global multilateral initiatives such as the Paris Climate Agreement. Since PV modules last for 25 to 35 years, EPIA¡¯s International Solar PV Investment Conference estimates that PV systems have a payback period of 8 to 12 years.
Intelligent hardware and software communication technologies can improve and extend solar streetlight functionality into data-driven information services with high performance and low returns. By using cloud-based software to realize remote management of each street light unit, integrating motion sensors, dimming functions and wireless networks, valuable data are sent back to utility companies or infrastructure providers to provide information on their energy generation and optical performance.
These improvements reduce maintenance costs by improving battery life (intelligent technology can extend battery life to 10 years), light life and LED light reliability as key components of solar street light system. Intelligent remote control of solar street light provides a lot of opportunities for the improvement of large-scale solar industry, and realizes the grid reliability of LED performance driven by clean energy. In this case, revenue will continue to increase when you consider that solar street lighting eliminates any grid interruptions caused by persistent electricity bills and blackouts.