Talking about how to configure solar energy in the end is reasonable? solar street light-litersola

How to configure solar energy in the end is reasonable? 1: Calculate the current first: For example: 12V battery system; 2 lamps of 30W, a total of 60 watts. Currentu003d60W÷12Vu003d5A 2: Calculate the battery capacity requirement: For example, the cumulative lighting time of street lamps needs to be 7 hours (h) at full load every night; 4:30 open 2 road, close at 5:30 in the morning) It needs to meet the lighting needs of 5 consecutive cloudy and rainy days. (5 days plus the lighting the night before the rainy day, 6 days) Battery u003d 5A×7h×(5+1) days u003d 5A×42h u003d 210AH In addition, in order to prevent the battery from being overcharged and over-discharged, the battery is generally charged to about 90%; Discharge remaining about 20%. So 210AH is only about 70% of the real standard in application. Three: Calculate the peak demand (WP) of the battery panel: The cumulative lighting time of the street lamp every night needs to be 7 hours (h); ★: The average daily effective lighting time of the battery panel is 4.5 hours (h); At least relax the demand for battery panels 20% reserve. WP÷17.4Vu003d(5A×7h×120%)÷4.5h WP÷17.4Vu003d9.33 WPu003d162(W) ★: The daily illumination time of 4.5h is the sunshine coefficient in the vicinity of the middle and lower reaches of the Yangtze River. In addition, in solar street light components, the line loss, the loss of the controller, and the power consumption of the ballast or constant current source are different, and may be around 5%-25% in practical applications. Therefore, 162W is only a theoretical value, and it needs to be increased according to the actual situation.
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