Description

Product Introduction

◎Core advantages of monocrystalline silicon: The 5000 Lumen Solar Street Light adopts a monocrystalline silicon solar panel, with a photoelectric conversion efficiency of 18%-24%, which is 15%-20% higher than that of polycrystalline silicon. It also features a lower attenuation rate, better low-light performance, and stronger high-temperature adaptability, resulting in significantly superior environmental compatibility compared to polycrystalline silicon.

◎Breakthrough in high-power design: With a high-brightness output of 5000 lumens and a 120° beam angle, the product achieves a coverage radius of 15 meters. It is equipped with an MPPT controller to dynamically balance power generation and consumption, supporting 3 days of continuous operation in cloudy and rainy weather, thus meeting the high requirements of main roads and other scenarios.

◎Synergy between materials and system: The monocrystalline silicon panel, combined with a lithium battery (with low-temperature/salt spray protection) and intelligent dimming technology, achieves zero-fault operation in extreme environments (such as low temperatures in Qinghai and salt spray in Hainan), with an average annual maintenance cost 70% lower than traditional solutions.

Monocrystalline Silicon Solar Panel

The power generation efficiency of solar street lights directly depends on the photoelectric conversion capability of the solar panel. Due to its highly ordered crystal structure and high carrier mobility, the monocrystalline silicon solar panel has become the most technologically mature and widely used high-efficiency photovoltaic module.

Photoelectric conversion efficiency

The photoelectric conversion efficiency of monocrystalline silicon solar panels can reach 18%-24% (up to 30% in laboratory environments), while that of polycrystalline silicon is only 16%-18%.

◎Monocrystalline silicon configuration: 60 monocrystalline silicon cells (5.5W per cell) with a total power of 330W, generating 1.65kWh per day (with 5 hours of sunlight);

◎Polycrystalline silicon configuration: 72 cells (4.8W per cell) are required to reach the same power, generating 1.44kWh per day.

◎Conclusion: The monocrystalline silicon solution can reduce the number of cells by 17%, lower bracket costs and installation complexity, while increasing the average daily power generation by 14.6%.

Attenuation rate and service life

Monocrystalline silicon has a lower density of crystal defects and stronger resistance to light-induced degradation (LID).

◎First-year attenuation rate: monocrystalline silicon < 3%, polycrystalline silicon > 5%;

◎Total attenuation over 25-year service life: monocrystalline silicon < 15%, polycrystalline silicon > 20%.

Low-light performance

The band gap width of monocrystalline silicon (1.1eV) is closer to the peak of the solar spectrum (0.5μm), enabling efficient power generation under low-light conditions such as cloudy days, dawn, and dusk.

◎At a light intensity of 500W/m²: monocrystalline silicon efficiency is 15%, while polycrystalline silicon is only 12%;

◎Temperature coefficient: monocrystalline silicon (-0.38%/℃) is better than polycrystalline silicon (-0.42%/℃), with slower performance attenuation in high-temperature environments.

Comparison table of core parameters between monocrystalline silicon and polycrystalline silicon

Parameter	Monocrystalline Silicon Solar Panel	Polycrystalline Silicon Solar Panel	Difference Analysis
Photoelectric Conversion Efficiency	18%-24%	16%-18%	Monocrystalline silicon is 15%-20% higher
First-Year Attenuation Rate	< 3%	> 5%	Monocrystalline silicon has 33% stronger stability
Total Attenuation over 25 Years	< 15%	> 20%	Monocrystalline silicon has a longer service life
Low-Light Efficiency (500W/m²)	15%	12%	Monocrystalline silicon is 25% better in low-light performance
Temperature Coefficient	-0.38%/℃	-0.42%/℃	Monocrystalline silicon has better high-temperature adaptability
Power Generation per Unit Area	220W/m²	180W/m²	Monocrystalline silicon is 22% higher
Cost ($/W)	0.15-0.20	0.12-0.18	Monocrystalline silicon has a 10%-15% premium
Applicable Scenarios	High-latitude, cloudy, high-temperature areas	Low-latitude, sunny areas	Monocrystalline silicon has wider environmental adaptability

5000 Lumen High-Power Design

The 5000 Lumen Solar Street Light achieves synergy through a high-power LED light source, a high-capacity lithium battery, and intelligent dimming technology.

Brightness and coverage range

◎Central illuminance: The 5000-lumen light source can provide 25lx central illuminance at a height of 12 meters (national standard requires ≥20lx), with a uniformity of 0.7;

◎Coverage radius: With a 120° beam angle, the effective coverage radius reaches 15 meters, 50% higher than that of 2000-lumen street lights;

◎Actual measurement comparison: In an industrial park project, the nighttime accident rate of 5000-lumen street lights was 40% lower than that of traditional street lights.

Balance between high power and energy efficiency

The core issue to be solved in high-power design is the matching of power generation and consumption. This product adopts a Maximum Power Point Tracking (MPPT) controller with an energy efficiency of 99%, 30% higher than that of traditional PWM controllers.

◎Power generation side: MPPT dynamically adjusts the working voltage of the solar panel to ensure maximum power output at all times;

◎Power consumption side: According to battery power and light intensity, it intelligently distributes power to the LED light source (e.g., full power of 5000 lumens is only triggered when motion is detected, and the default low-power mode of 1500 lumens is maintained);

◎Energy storage side: Equipped with a 24V/200Ah lithium battery, supporting 3 days of continuous lighting in cloudy and rainy weather, with a service life 3 times longer than that of lead-acid batteries.