1. At present, one of the most important links restricting the application of solar power generation is the price. Taking a two-way solar street lamp as an example, the two-way load is 60W in total. (based on the calculation of 4.5h/day of effective light in the middle and lower reaches of the Yangtze River, 7 hours per night of discharge, and 20% of the reserved amount of the battery plate) the battery plate needs about 160W, and the cost of the battery plate is 640 yuan per watt, plus 180Ah The cost of battery is also around 1080. The cost of the whole street lamp is much higher than that of the city circuit lamp. This is the main bottleneck of solar street lamp applications. However, in the long term, solar street light will save the most cost, such as maintenance, battery, and labor. Additionally, 20W solar street light is recommended to save the cost at the beginning if the budget is not enough.

2. The service life of the battery should also be considered in the application of the whole street light system. The general battery warranty is three to five years, but the general battery will not be fully charged after one year or even half a year. Some actual charging rates may fall to about 50%, which will affect the normal lighting at night and in continuous rainy days, so choose a good solar battery is especially important.

3. Some engineering companies often choose LED lamps as the lighting of solar street lights, but the quality of LED lamps is uneven, and the LED lamps with severe light decay are likely to reduce 50% illumination in half a year. So we must choose an LED lamp with slow light decay, or choose the electrodeless lamps, low-pressure sodium lamps, etc.

4. In many practical applications of solar street lamps, solar street lamps in many places can not meet the normal lighting needs, especially on rainy days. In addition to the application of the relevant components with poor quality. On the other hand, reducing the cost of the components and the use standard of the battery, and do not design and configure according to the demand. Therefore, the solar street lights are not available on rainy days to provide lighting.