The price of 60 watts of solar street light

The configuration of the solar street lamps calculation is how to calculate? Calculation of current such as: 12 v storage battery; 2 only 30 w lamp, a total of 60 watts. Present current = 60 w 12 v = 5 A capacity calculation such as street lamp lighting time every night. 5 hours, the actual lighting for 7 hours (full load h) ; Example 1:1 road



the configuration of the solar street lamps calculation is how to calculate?

calculate current

such as: 12 v battery' Battery is a kind of chemical energy directly into electrical energy device, is designed according to the rechargeable batteries, rechargeable by reversible chemical reactions, usually is refers to the lead-acid battery, it is one of the battery, belongs to the secondary battery. 】 ; 2 only 30 w lamp, a total of 60 watts.

present current = 60 w 12 v = 5 A

capacity

such as street lamp lighting time every night. 5 hours, the actual lighting for 7 hours (full load h) ;

a: 1 road LED lights

( If at 7:30 in the evening to open 100% power, the night 11 to 50% power, 100% power again after 4:00 in the morning, at 5:00 am close)

example 2:2 way the leds ( Low voltage sodium lamp, energy-saving lamps, energy-saving lamps, etc. )

( As two road opened at 7:30 in the evening, night 11 close road 1, at 4 in the morning to open 2 road, 5:00 in the morning off)

need continuous rainy day lighting needs 5 days. ( Plus 5 days before the rainy night lighting, 6 days)

= 5 a * 7 h * (battery 5 + 1) Day

= 5 a * 42 h = 210 ah

in addition to prevent the battery charge and discharge, battery charge in general to around 90%; Discharge the remaining 5% About 20%. So 210 ah really 70% - are just applications 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 - 15% About 25%.

peak

street lamp lighting of accumulative total of every night time need for 7 hours ( h) ;

u: panels accept effective illumination time is 4 a day on average. 5 hours ( h) ;

ease demand for panels 20% less reserved the forehead.

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