Solar street lamp installation reference

Related Components
24VLED: Select LED lighting, which has a long service life, soft lighting, and reasonable price. It can achieve power regulation during periods of scarce pedestrians at night, which is conducive to power saving, thereby reducing the configuration of battery panels, and saving costs. About 80-105lm per watt, with light attenuation less than or equal to 5% per year;
12V battery (string 24V): Lead acid maintenance free battery is selected, with moderate price and stable performance. It is the preferred choice for solar street lamps;
12V battery board (string 24V): conversion rate above 15% single crystal positive;
24V controller: MCT charging mode, with power regulation function (additional information attached);
6M lamp pole (mainly featuring beautiful appearance, durability, and low price)
40W Example 1
LED lamp, single circuit, 40W, 24V system;
2. The local daily effective illumination is calculated based on 4h;
3. The daily discharge time is 10 hours (taking 7pm to 5am as an example)
4. Meet the requirement of 5 consecutive rainy days (plus 6 days of electricity consumption for the night before the rainy day).
Current=40W ÷ 24V=1.67 A
Calculated battery=1.67A × 10h × (5+1) days
= 1.67A × 60h=100 AH
Reserve 20% capacity for battery charging and discharging; The actual current of the street lamp is above 2A (plus 20% loss, including constant current source, line loss, etc.)
Actual battery demand=100 AH plus 20% reserved capacity, plus 20% loss
100AH ÷ 80% × 120% = 150AH
The actual battery is 24V/150AH, requiring two sets of 12V batteries, totaling 300AH
Battery panel
LED lamp 40W, current: 1.67A
2. Daily discharge time: 10 hours (taking 7pm to 5am as an example)
3. Minimum 20% reserved for battery panel
4. The local effective lighting is calculated based on the daily average of 4h
WP÷17.4V =（1.67A × 10h × 120%）÷ 4 h
WP = 87W
The actual constant current source loss, line loss, and other comprehensive losses are around 20%
Actual demand for battery panel=87W × 120% = 104W
The actual battery panel requires 24V/104W, so two 12V battery panels are required, totaling 208W
Comprehensive component price: 208W positive panel, 31 yuan/watt, totaling 6448 yuan
Battery 300AH, 7 yuan/AH: 2100 yuan
40W LED lamp: 1850 yuan
Controller (piece) 150 yuan
6 meter lamp pole 700 yuan
Total of this set of components: 11248 yuan
40W Example 2
1. LED lamp, single circuit, 40W, 24V system.
2. The local daily effective illumination is calculated based on 4h,
3. The daily discharge time is 10 hours, (taking 7pm to 5am as an example) through the controller at night
Adjust the power of LED lamps in different periods to reduce total power consumption. The actual discharge time is calculated as 7 hours per day.
(Example 1: 100% power from 7pm to 11pm, and 50% power from 11pm to 5am. Total: 7h)
(Example 2: 7:00-10:30 is 100%, 10:30-4:30 is 50%, 4:30-5:00 is 100%)
4. Meet the requirement of 5 consecutive rainy days (plus 6 days of electricity consumption for the night before the rainy day).
Current=40W ÷ 24V
=1.67 A
Calculated battery=1.67A × 7h × (5+1) days
= 1.67A × 42h
=70 AH
Reserve 20% capacity for battery charging and discharging;
The actual current of the street lamp is above 2A (plus 20% loss, including constant current source, line loss, etc.)
Actual battery demand=70AH plus 20% reserved capacity, plus 20% loss
70AH ÷ 80% × 120% = 105AH
The actual battery is 24V/105AH, requiring two sets of 12V batteries, totaling 210AH
Battery panel
LED lamp 40W, current: 1.67A
2. The daily discharge time is 10 hours, and the actual calculation is based on 7 hours after power adjustment (power adjustment is the same as that of battery)
3. Minimum 20% reserved for battery panel
4. The local effective lighting is calculated based on the daily average of 4h
WP÷17.4V = （1.67A × 7h × 120%）÷ 4 h
WP = 61W
The actual constant current source loss, line loss, and other comprehensive losses are around 20%
Actual demand for battery panel=61W × 120% = 73W
The actual battery panel requires 24V/73W, so two 12V battery panels are required, totaling 146W
Comprehensive component price: 146W positive panel,
Battery 210AH
40W LED lamp: Total: 1850 yuan
Controller (piece): 150 yuan
6 meter lamp pole 700 yuan
40W Example 3
Adopt an integrated controller with constant current, constant voltage, and power regulation to reduce system power consumption and component costs.
(The actual reduction in total system loss is about 20%, and the following is calculated as 15%)
1. LED lamp, single circuit, 40W, 24V system.
2. The local daily effective illumination is calculated based on 4h,
The daily discharge time is the same as in Example 2, and the adjustment is the same in different periods;
4. Meet the requirement of 5 consecutive rainy days (plus 6 days of electricity consumption for the night before the rainy day).
Current=40W ÷ 24V
=1.67 A
Calculated battery=1.67A × 7h × (5+1) days
= 1.67A × 42h
=70 AH
Reserve 20% capacity for battery charging and discharging; The actual current of the street lamp is less than 1.75A (plus 5% line loss, etc.)
Actual battery demand=70AH plus 20% reserved capacity, plus 5% loss
70AH ÷ 80% × 105% = 92AH
The actual battery is 24V/92AH, requiring two sets of 12V batteries, totaling 184AH
Battery panel
LED lamp 40W, current: 1.67A
2. The daily discharge time is 10 hours, and the actual calculation is 7 hours (power regulation is the same as that of storage battery)
3. Minimum 20% reserved for battery panel
4. The local effective lighting is calculated based on the daily average of 4h
WP÷17.4V = （1.67A × 7h × 120%）÷ 4 h
WP = 61W
Actual line loss and other comprehensive losses are less than 5%
Actual demand for battery panel=122W × 105% = 64W
The actual battery panel requires 24V/64W, so two 12V battery panels are required, totaling 128W
Comprehensive component price: 128W positive panel, 31 yuan/watt, total: 3968 yuan
Battery 184AH, 7 yuan/AH
40W LED lamp: 1850 yuan
Controller (piece): 150 yuan
6 meter lamp pole 700 yuan