In this PPT, we teach a few factors about how we select solar street lights before proceed a project. The whole solar system is very important to local market and your business. If you’re in charge of the solar outdoor lighting project, do you want to maintain the lights every now and then ? Therefore, if you hope to proceed the project properly, I would strongly recommend you read this PPT before you select solar street lights. Of course, it’s an honor to receive your call/email if you have any question. I would like to provide my best service. Buy quality and technology from SRS solar, buy confidence from Mr Ethan Ho. For more information, please click in WWW.MRETHANHO.COM.

1. How to select solar street light-SRS
• Currently, customers are confused by so many different quality solar street
lights without any industry standards. So
How to select solar street light ？
• We provide our professional advices as
How bright?
How many working days?
How long is the life span?

2. How Bright IT WOULD BE ?
A. We are using small-power LED (0.066W/pcs), through our patent assembly design
for chip, luminous efficiency can reach 130-140Lm/W, at least >30% brighter than
the regular LED. E.g. like 6m height of light source, we need only 35W to achieve
36Lux, and others need 45-56W.
SRS patent Normal One High Power LED bulb

3. How IT WORKS
B. Rectangular (Square) shape light distribution without extra lens.
Dramatically improved the efficiency of LED lighting.
At present, lens need for light distribution by most vendors.
Through our own patented design technology for LED, it can form light
distribution without lens and evenly distributed in a rectangular shape,
every emitting angle can reach 150 degrees.
Lead to our LED is 30% brighter than normal.
Maximizing heat dissipation, reduce light decay, prolong light life.

4. How many working days without sunshine?
100% Lighting throughout the whole year - Digital
Controller
Working principle
How many working days without sunshine (A) =
battery capacity (B) --fixed
LED power consumption) (C)
From above formula, in order to increase working days while no sunshine,
the only way is to decrease the LED power consumption. Using our
patent digital controller, solar street lights can save >80% power to compared with
other systems. that is to say, in the same working period, our power consumption
takes only 20% of the others.
Our Controller got 2 patents,
one is invention patent,
Patent No.:
ZL200710031050.6
ZL200720058676.1

5. 100% Lighting throughout the whole year - Digital Controller
A. LED is a semiconductor device, has on-off feature. Due to human visual effect,
when frequency over 25t/s, we can not feel. Our controller frequency is up to
10K-100Kt/s. through our patent digital controller, we can supply interim
power to be half working, save 50% power. But normally solar street lamps
that using constant current driver , supply continuous power all the time.
Therefore, we can save 50% power. On-site testing saved >47.3%.
50%+20%+10%=80%
Why & How our controller can save 80% power comparing with others.
Other LED lamp working SRS LED lamp working

6. How many working days while no sunshine?
100% Lighting throughout the whole year -
Digital Controller
B. Constant current driver consumes 15-20% power when operating.
Instead of the traditional LED analogue driver, our Digital patented
controller uses 4 IC to replace it. Only consume 0.0625W power
when working. So, further saving of 15-20% is realized.
LED Constant current Driver SRS LED Digital Controller

7. How many working days while no sunshine?
100% Lighting throughout the whole year -
Digital Controller
C. Unique energy saving mode design from our digital controller, after midnigh, we
could decrease the lamp’s power gradually to a desired value and keep this value
until dawn. Further saving of 10-15% power consumption.
Other vendors’ energy saving mode is to adjust the voltage, current or power to be a
certain value by sundenly.
Other LED lamp working SRS LED lamp working
SRS solar street light system saves 70-85% power consumption compared with other regulars ----5
times longer, to make sure keeps lighting 25-35 continous days without sunshine. Realizes
100% Lighting by whole year.

8. How long is life span of the system?
--Battery, LED and controller
A. Battery Life:
The most important material is electrolyte inside.
There are two important factors to prolong the life span.
1 ） Deep Cycle times--Our solar street light saves 70-85% power
consumption compared with regular one. Therefore, each deep cycle time
is greatly prolonged.
2 ） Environment Temperature--Most suitable working temperature for
battery is 20-25 , if higher or less than 10 , the life span would be only℃ ℃
a half.

9. How long is life span of the system?
--Battery, LED and controller
• Most vendors put the batteries inside a box hanging on the pole.
That is the reason why their street light batteries can only have 1 year life,
• We Bury the battery under ground.
We suggest bury the battery under tundra, which is about 0.7-1m deep
(consult the local geographic authorities for different situation).
As the battery’s working efficiency & life span depends on the temperature,
the constant temperature under tundra (about 20-25℃) could
effectively improve the battery’s
performance and life span.

10. How long is life span of the system?
--Battery, LED and controller
Why our batteries can be buried under the tundra?
--- Nano Technology Casing
• Our battery casing is designed specially for solar applications, advanced
Nano technology is used in the casing, insulation & waterproof of the
electrodes are well considered, therefore none electricity leakage & water
seepage when buried underground.
• Life span of our battery is 5-8 years , others are only 1-2 years normally.
• Gel battery: 8-12 years.
Battery is about 20% of total cost for whole solar street light,
changing the battery 5 times means buying another new solar
street light within 10 years.

11. How long is life span of the system?
--Battery, LED and controller
B. LED lamp life:
Major problem with current high-power LED street light is difficult heat
elimination, which result to different light decay. Serious light decay:
--45-55 V.S. 65-75℃ ℃
LED
Street Lamp
Temperature rise Light decay
within 10,000Hrs
The Life span
Our low power 20 ℃ < 4% 10 years
Others high power >40 ℃ >10% < 5years

12. How long is life span of the system?
--Battery, LED and controller
C. Controller Life
• Capacitor is a indispensable device in the Constant Current Driver,
its life span: <5 years.
• Our SRS patent controller uses 4pcs of IC to replace the Constant current
driver, so there is no capacitor in our controller. The main material of IC is
silicone, can reach 25-30 years. So our controller life can over 10 years.

13. Cable & connectors
Our Ultra-violet pure silicone rubber copper wire and Silver-plated high-strength
anti-aging waterproof connectors helps to reduce the cable system resistance &
the power loss in the wire to the minimum extent. This special solar wire,
smallest resistance and loss, excellent system reliability, saves energy.
Note: Many non-professional manufacturers think the resistance of solar street
lights are the same as AC powered street lights. Nothing important to separate
them. Following is the compared result for street lights:
Solar powered (LED): 240W panel, 24V SYSTEM, I=240/24=10A. P=10²R=100R,
AC powered (HPS) : 220W sodium lamp, 220V I=220/220=1A, P=1²R=1R
Then you can see the difference between their system current (A).
So the cables and connectors are also very important in the system.

14. Steel Pole
• high-carbon steel
• hot-dip galvanized
• plastic spray coating
• Antirust within 30 years

15. Conclusion
• Top grade level components are carefully selected & checked by strict
quality inspection before mass production, to make sure reliable quality for
whole lights.
• As the same ground illuminance, our working duration in rainy/cloudy
days is 5 times longer. Much more competitive price with the prolong life
span. Promise 100% lighting throughout the whole year.
How to select solar street light?
-- You know, right?