Discuss how to choose the principle diagram of the solar street light and solar street light

Below we give a concrete example 1, LED lights, single-channel, 40 w, 24 v system; 2, the local average effective illumination in 4 h calculation; 3, 10 hours daily discharge time, 7 PM - morning 5 PM, for example) 4, meet the continuous rainy days (5 days Plus the rainy night before

let's take a concrete example 1. Single channel, 40 w, 24 v system of led lamp; 2. Daily effective illumination calculation in 4 h. 3. Discharge time for 10 hours a day, At 7:00 p. m. . . At 5:00, for example) 4, encounter a rainy day 5 consecutive days, Combined with the rain of the night, 6 days) 。 Current = 40 wddivide. 24V =1. 67 Ann computing batteries = 1. 67 a times; 10 times; ( 5 + 1) Day = 1. 67 times; 60 h = 100 AH to battery charging and discharging set aside 20% of capacity; Street light of the actual current is higher than 2 a ( Plus 20%) Loss, including the constant current source, line loss, etc. ) Actual need = = 100 ah battery plus 20% retention capacity and the loss of 20%. 100 ah frequency division; 80%; 120% = 150 ah utility for 24 v / 150 ah battery, need two set of the 12 v battery, a total of 300 ah. Calculate the panels: 1. 40 w led lamp, current: 1. 67 2. Discharge time for 10 hours a day, At 7:00 p. m. . . At 5:00, for example) 3, panels set aside at least 20% 4. Local average intensity of illumination by 4 h WPdivide17 effectively. 4 v = ( 1. 67 times; 10 times; 120%) In addition to; 4 hour power = 87 w, in fact, constant current source and total loss of about 20% of line loss panels practice demand = 87; 120% = 104 panels of the practical need 24 v / 104 w, so I need two pieces of 12 v panels, total power of 208 w in this era of price confusion, choose lamps and lanterns, like choose the computer. It is better than expensive. Because cheap, so it's a good deal. There is still a need to know price.