Solar energy road lighting is widely used in the photovoltaic industry, mainly used for garden and lawn decoration and lighting. He is an independent power generation system, independent of the completion of the conversion of solar energy into electricity, and can be converted into thermal energy Gong Zhaoming and decorative use, does not require the transmission of wires.

An overview of solar street lamps

Solar street lamp uses solar energy during the day, Beijing Tianzhu sunshine to recharge the battery, the battery power supply to load at night, without complicated and expensive pipeline laying, adjustable lighting layout, safety and energy saving and no pollution, without manual operation is stable and reliable, saving electricity and maintenance free.

1 system components

The system comprises a solar battery component part (including bracket), LED lamp, control box (with controller, battery and lamp) several parts of Beijing; Tianzhu sunshine solar panels light efficiency reached 127Wp/m2, higher efficiency, is favorable for the wind resistant design of the system; the lamp head to 1W-5W white LED and 1W-5W yellow light LED integrated on the printed circuit board is arranged in a certain distance matrix as plane light source.

Control box box with stainless steel as material, beautiful and durable; control box placement maintenance free lead-acid battery and charge and discharge controller. This system chooses the VRLA battery, because of its little maintenance, so it is also called "maintenance free battery", the system is conducive to the maintenance cost is reduced; the charge and discharge controller both functions in the design (with light control, time control, overcharge protection, over discharge protection and reverse protection etc.) and cost control, to achieve a very high price.

2 working principle

The working principle of the system is simple, the use of solar photovoltaic panels during the day the principle of solar radiation and into electrical energy output, through the charging and discharging controller is stored in the accumulator. When night illumination gradually reduced to about 10lux, Beijing Tianzhu sunshine solar battery board open circuit voltage is about 4.5V, the charge and discharge controller to detect the a voltage value of the battery discharge lamp action. 8.5 hours after the battery discharge, the charge and discharge controller action, the battery discharge end. The main function of charge and discharge controller is to protect the battery.

3 design ideas

1, solar cell module selection

Design requirements: Beijing area, the load input voltage 24V power 34.5W, the number of hours of work per day 8.5H, to ensure that the number of consecutive rainy days 7 days.

The Beijing area in the past twenty years the average annual amount of radiation 107.7Kcal/cm2, after a simple calculation in Beijing peak sunshine hours is about 3.424h;

The load on power consumption = = 12.2AH

The required Beijing Tianzhu sunshine solar energy components of the total charge current = 1.05 * 12.2 * (3.424 * 0.85) =5.9A.

Here, the design of the shortest number of days between two consecutive rainy days is 20 days, 1.05 of the solar cell component system integrated loss coefficient, 0.85 for the battery charging efficiency.

The minimum total power solar module number = 17.2 x 5.9 = 102W

Selection of peak output power 110Wp, single block 55Wp standard battery components, should be able to ensure that the street lamp system in most cases a year to normal operation.

Zhongshan solar street lamp product parameters:

Main material: * pole steel structure, overall hot galvanizing / spray treatment

* solar cell components: crystalline silicon 15-80WP (by load profile)

* system operating voltage: DC 24V - 12V

* with a special controller: controller, light and time control, intelligent control (dark dawn light lamp from open, self extinguishing)

* energy storage battery: fully enclosed maintenance free lead acid storage battery 80Ah - 12V17Ah (according to the load configuration)

* light source type: energy saving high power integrated LED, rare earth high efficiency energy saving lamp (can be configured according to customer’s requirement)

* protection level: IP65

* use temperature: -30 degrees to 70 degrees, wind resistance is more than 150Km/h

* lighting time: 4 to 14 hours (according to the need to adjust)

* pole height: 4 meters to 10 meters (can be produced according to customer requirements)

* rainy days guarantee: can work continuously 4~5 rainy days (regional / seasonal difference) (according to customer requirements of production)

Zhongshan solar street without laying underground cable, no need to pay for lighting, key components of solar panels, the solar street lamp intelligent controller, DC maintenance free storage battery and a lighting lamp through the national development and Reform Commission, the world bank /GEF/ photovoltaic products certification. Mainly used for city roads, residential area, industrial park, * * tourist attractions, the park green belt and other places of lighting.