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?

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

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.

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 ourpatent 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 consumptiontakes only 20% of the others.

Our Controller got 2 patents, one is invention patent,

Patent No.: ZL200710031050.6 ZL200720058676.1

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

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

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.

How long is life span of the system?

--Battery, LED and controllerA. 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.

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.

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.

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

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.

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.

Steel Pole

• high-carbon steel

• hot-dip galvanized

• plastic spray coating

• Antirust within 30 years

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?