How to configure the sun solar panels and solar street light price battery

Manufacturer to teach you how to use calculation formula with solar panels and batteries: with 12 v 60 w street light, for example, according to use hours per day for continuous rainy day 4 days, 7 h, in shandong province zhongshan applications, combined with the first calculate the current local illumination: current = 6



manufacturer to teach you how to use calculation formula with solar panels and batteries:

to 60 w 12 v lights, for example, by using hours a day for 7 h, rainy day 4 consecutive days, in shandong province zhongshan applications, combined with local lighting

first calculate the current:

current = 60 w & divide; The 12 v = 5 A calculate the battery capacity requirements:

need to meet the demand of continuous rainy day lighting. ( 4 days plus the rainy night lighting, 5 days)

= 5 a battery & times; 7 h× ( 4 + 1) Day = 5 a & times; 35 h = 185 ah

in addition to prevent the battery charge and discharge, battery charge in general to around 90%; Discharge the remaining 5% About 20%.

so real standard in the application of 185 ah is just 70% About 85%. Also, depending on the load, measure the actual loss, the actual working current affected by the constant current source, ballast, line loss, etc, may be on the basis of 5 a increased 15% About 25%.

calculate the panels of peak demand, WP) :

street lamp lighting time need for 7 hours every night, h) ;

u: panels accept effective illumination time is 4 a day on average. 。 4 hours ( h) ;

ease demand for panels at least 25% of the reserve amount.

WP÷ 17. 6V= ( 5A × 7 h× 125%) ÷ 4. 4 h

WP÷ 17. 6V= 9. 33

　　WP= 175( W)

　　★：4. 4 h light time each day for shandong rizhao coefficient region near the area.

in the components of solar street lamps, line loss, the wastage of the controller, and power consumption of the ballast or constant current source is different, may be 15% in actual application About 25% of solar street light price. So is the theoretical value of 165 w, according to the actual situation to increase.

optimize components configuration according to the requirement lights work continuously in four days, in order to ensure that after four days after discharge, can return to work as soon as possible, the components, the capacity to increase the charge

in short period of time, if the local rainy days for 4 days more, to control the charging time within 2 days.

to choose 175 wp components, for example, to estimate the charging time. Charging efficiency in 0

9 & ndash; 0. Take 0 9, 95. The average battery charging time: 2 x120 measures how x12 & times; O. 75 / ( 0. 9× × 160× 4. 45) = 3. Four days, time is too long. Select 210 wp, the charging time about 2 days at the moment. We can find that in the configuration component cannot see daily power consumption, only combine battery capacity to optimize configuration. 【 The above content released by high lamp manufacturer to arrange for you 】