1: One of the most important factors restricting the application of solar power is the price, taking a two-way solar street light as an example, with a total load of 60 watts, with effective illumination of 4 in the middle and lower reaches of the Yangtze River. 5h/days, the discharge 7 hours per night, increase the battery board 20% reserve calculation) Its battery board needs to be around 160W, according to 20 yuan per watt calculation, the cost of the battery board will be 3200 yuan, plus 180AH around the battery group costs are also around 1800, The whole one-time input cost of street lamp is much higher than that of Mains street, which causes the main bottleneck of Solar street lamp application.
2: Battery life should also be considered in the entire application of street lamp system, the general battery warranty three years or five years, but the general battery in one years, or even half a year later will appear charging dissatisfaction situation, some actual charging rate may fall to about 50%, this will affect the continuous rainy days of the night normal lighting, so choose a better battery is particularly important.
3: Some engineers often choose LED lights as solar street lighting, but the quality of LED lights are uneven, the light loss of serious led six months may decay 50% illumination. So be sure to choose the light fade slower LED lamp, or choose electrodeless lamp, low pressure sodium lamp and so on.