DETAILED NOTE ON SOLAR STREET LIGHTING SYSTEM General Information

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DETAILED NOTE ON SOLAR STREET LIGHTING SYSTEM General Information A Solar Module produces electricity when exposed to the Sun, then it charges a battery and releases to a load when required.

1 DETAILED NOTE ON SOLAR STREET LIGHTING SYSTEM General Information A Solar Module produces electricity when exposed to the Sun, then it charges a battery and releases to a load when required. There are Charge Controller and electronics which functions in the following manner. Regulates charging input to the Battery Prevents Over charging of the Battery Prevents Low discharging of the Battery Automatic Switch ON & OFF of the Load ( in this case it is the Lamp) DIFFERENT TYPES OF SOLAR STREET LIGHTING SYSTEM Four different types of Solar Street Lighting Systems are available, namely, 1. STAND ALONE STREET LIGHTS 2. CENTRALISED STREET LIGHTS 3. PORTABLE STREET LIGHTS 4. RETROFIT STREET LIGHTS

2 1. SPECIFICATIONS OF SYSTEM COMPONENTS 1.1. SOLAR MODULE This is a very important source for power generation and the solar modules supplied by SOLKAR are made by under strict quality standards and specifications. We supply only SINGLE/MULTI CRYSTALLAINE silicon cells based modules which have long life of 25 years and our modules are available only with above 15% efficiency solar cells. This assures a greater power generation at less space needs and longer life cycles. 1.2 BATTERY Many a times, a solar street light fails because of improper selection of battery type and specifications. As you are aware, power is generated only in day time but load is used only in night time. Therefore, battery is a crucial component of the solar street lighting system. After considerable experience from field and trying of different battery spec and makes, we have zeroed in on LEAD ACID, TUBULAR, LOW MAINTAINENCE, C 10 RATED BATTERY ( INSTEAD OF C 20 ) to make sure the battery has longer life cycles and charges faster and discharges longer.

3 1.3 LIGHTING DOME The most important aspect to choose on these is the light fitting. Primarily the source of light can be as below Tube Lights CFL LED Metal Halide Sodium Vapour It is very important to have low power consumption, high brightness light source. We manufacture only LED type Solar Street Lighting system. Quality of LED used is very very important to ensure proper brightness, lower power consumption and longer life. There are plenty of unbranded Chinese LED available in the market which costs almost one fifth of a branded product. We use only OSRAM / PHILIPS LED in our product. The casing is also very important because it should be water proof, Heat proof and easy to clean and having high transparency CHARGE CONTROLLER AND ELECTRONICS SOLKAR manufacturing CHARGE CONTROLLER for different applications since These are made with latest designs, components and easy to service and replace with highest reliability.

4 SPECIFICATION OF SOLKAR LED LUMINAIRE Luminaire power 6W 12W 24W Light Source High Power LED High Power LED High Power LED Input Voltage 12V DC 12V DC 230V AC No of LED Wattage per LED Lumen /WATT Light Output per fitting (Lumens) 600 ± 5% 1200 ± 5% 1920 lm ±5% LED Make Osram/Nichia/Philips Osram/Nichia/Philips Philips Color Temperature(K) Pure White: k, Warm White: k Pure White: k, Warm White: k Pure White: k, Warm White: k CRI >70 >70 >70 Driver Efficiency >85% >85% >85% Driver Constant Current Constant Current Constant Current LED life hours 70% lumen Ta=36 C: hours 70% lumen Ta=36 C: hours 70% lumen Ta=36 C: Light Output LUX 12 Lux at 3 mtr ht 14 Lux at 4 mtr ht 19 Lux at 4.2 mtr ht Suggested Pole to Pole pitch 6 mtr 10 mtr 15mtr Net Wt of luminaire Kg INGRESS PROTECTION IP Light Body& Lampshade PC with integrated Heat sink Aluminium Die Cast and PC Aluminium Die Cast and PC

5 COMPARISON OF BRIGHTNESS VS HEIGHT FOR 3 DOMES 6 W DOME BRIGHTNESS 12 W DOME BRIGHTNESS 24 W DOME BRIGHTNESS

These products are commonly seen in decentralised light applications such as Road lights and Lighting at un-electrified locations etc.

6 2. STAND ALONE SOLAR STREET LIGHTING SYSTEM Basically Stand alone systems are installed in the field. There is a pole which has Solar Module on the top, a Dome with light fitting, a Battery box with electronics and Battery in it. These products are commonly seen in decentralised light applications such as Road lights and Lighting at un-electrified locations etc., In stand alone street lights all the components of the street lights such as SOLAR MODULE, BATTERY BOX, CHARGE CONTROLLER, LIGHT DOME are fixed in a single pole itself. The battery is Charged only by SOLAR MODULE. There is no connection of EB power to this pole. The poles are installed at site and civil works foundations are required to ensure their rigidity. We have Stand alone system in 2 models, which is with 6W LED Dome and 12W LED Dome. The specification of Solar Module and Battery depends upon the Wattage of light dome and number of hours of illumination required every day.

7 The detailed specification of Stand Alone Solar Street Lighting system manufactured by us are given below. Sl No Description Sun Divine Sun Divine + 1 LAMP POWER 6 W 12 W 2 Hrs. of Operation/Day 12 Hours 12 Hours 3 Days of Autonomy 1 day 1 day 4 Solar Module 37W 12V 75W 12V 5 Battery 12V 20AH 12V 40AH 6 Charge Control Unit 7 Pole Ref drawing 8 Application-suitable for Auto On / Off Charge Control Low Cut Off MS 2 DIA Private Road / Peripheral Lights Auto On / Off Charge Control Low Cut Off MS 2 DIA Private Road / Peripheral Lights 9 Price-Each Rs.15, Rs.26, The above Price does not include 5%, Transportation, Installation and Civil work charges. Includes POLE, SOLAR MODULES, BATTERY, DOME, CHARGE CONTROLLER WARRANTY : The solar Modules are warranted for 10 years, Lamp Dome 1 year, Battery 3 years, Electronics and charge controller 3 years

9 The Main Concerns of the Stand Alone Solar Street Lighting system are i. Cleaning of the Solar Modules needs careful attention as it is mounted on a single pole at a height of 12/15 feet and must be done every month as it is mounted in the field and dust accumulations can be fast. ii. Battery is charged only by Solar Module and therefore during rainy season this product will not work beyond 1 day of Autonomy and the light must be manually switched OFF during rainy season. If not the battery will be dead immediately iii. If the above 2 procedures are not done, then the life of the battery is not more than one rainy season iv. Even small level of dust on the Solar Module affects the performance. v. Being a fixed model in future shadow may fall on the Solar Module if any adjacent tree grows or building comes up. vi. These are fixed products which cannot be shifted or modified.

10 3. CENTRALISED SOLAR STREET LIGHTING SYSTEM This is a very unique product which is suitable when you have number of lights one after another, for eg; Road lights, Compound wall lights, Roof top lights, etc. And when you need brighter lights, taller pole heights and easy maintenance and future upgrades are required. We have successfully innovated and developed this product in a manner addressing all the drawbacks of Stand Alone Street Lighting system which are as follows Cleaning of the Solar Module is easy as it is located in one location. Battery is charged both by Solar and in rainy days by normal EB supply thereby ensuring 365 days working and better Battery life. We have combined energy conservation by making all the Street Lights burn in full brightness between 6.00 pm to pm and only alternate lights works from pm to 6.00 am. It is also possible to make all the lights work with full brightness from 6.00 pm to pm and 1/3 brightness from pm to 6.00 am. It is possible to have display banners on each street light poles as shown in the picture and have them convey message or sponsorship of corporate companies. The systems are supplied with complete solar system with battery back up, inverter, Poles with light domes, wiring of the each pole with the main inverter, Trenching and closing, Training and back up service. We manufacture these Centralised system with a 24W LED dome. We have package of 25 lights, 50 lights & 100 lights.

11 Uninterrupted Power Earth Centralised Solar Street Lighting System

13 WARRANTY : The solar Modules are warranted for 10 years, Lamp Dome 1 year, Battery 3 years, Electronics and charge controller 3 years

14 4. PORTABLE SOLAR STREET LIGHTING SYSTEM These are first of its kind in India which enables the user to have portable solar street lights which can empower at any location either outdoor or indoor or roof top. The Advantages of this product is as below Light weight and it is ON wheels and can be positioned at any usage point The height can be adjusted as required The number of lamp fitting can be additional if more brightness required. For example you can have one or two Domes on the same pole. Dual Charging facility by both Solar and EB Ideally suitable for Road construction projects, Builders, Municipalities, Colleges, Schools, Factories, Flat/Apartments, etc., Easy to maintain the Solar Module, as it is within reachable height. Great advantage is cleaning of the module/ top up of the battery are very easy in this model.

15 ALL HEIGHTS SINGLE DOME FRONT & BACK SINGLE DOME ALL HEIGHTS TWO DOME BATTERY BOX WITH TROLLEY BATTERY BOX WITH EB SWITCH MODULE FRONT / SIDE TWO DOMES DOMES ALL SIDES WITH OUT MODULE

16 Different Models Model A B C D E F Luminaire 6W x 1 6W x 1 6W x 2 12W x 1 12W x 1 12W x 2 No Of hours Solar Module Rating 37W 12V 15W 12V 37W 12V 75W12V 37W 12V 75W12V Battery Type Lead Acid Tubular Lead Acid Tubular Lead Acid Tubular Lead Acid Tubular Lead Acid Tubular Lead Acid Tubular Rating 12V 20Ah - C10 12V 20Ah - C10 12V 20Ah- C10 12V40Ah- C10 12V 40Ah- C10 12V40Ah- C10 Solar charge controller Rating 6A 6A 6A 10A 6A 10A Type PWM PWM PWM PWM PWM PWM Efficiency >95% >95% >95% >95% >95% >95% Mode Manual Manual Manual Manual Manual Manual PRICE Rs. 18,000/ Rs. 15,000/ Rs. 19,500/ Rs. 30,000/ Rs. 24,000/ Rs. 32,000/ Protection Short Circuit protection,reverse polarity,battery Over charging and deep discharging The above price does not include 5%, Transport cost and no installation is required SPECIFICATIONS AND DATA ARE SUBJECT TO CHANGE WITHOUT NOTICE DUE TO CONSTANT DEVELOPMENT TO IMPROVE IN DESIGN,FUNCTION OR FOR ANY OTHER REASONS WARRANTY : The solar Modules are warranted for 10 years, Lamp Dome 1 year, Battery 3 years, Electronics and charge controller 3 years SPECIAL REMARK You can purchase one sample and use it to know how many you will need.

18 5. RETRO FIT MODEL - SOLAR STREET LIGHTING SYSTEM In this model, we retro fit to an existing street lighting pole solar lights. They are equivalent to stand alone models or Central lighting system models as described above. You can select the model from the Stand alone or Central system and have them fitted on to your existing poles. This will save additional cost of pole, civil work, transport and wiring for back up working. It is possible to use this pole as in dual modes only solar during summer months and on normal electricity with existing street light dome during winter or rainy months. To design and offer cost, we need to know the following details 1. Layout of the existing poles and contour of present positioning with pitch distances 2. Dimensional details of the pole, lamp load etc 3. Preference of stand alone or centralised solar portion

20 WORD OF CAUTION The biggest concern of Solar Street Lighting system is proper selection of the lamp brightness. Even in LED there is so much of varieties manufactured from China, though the specification are same, the brightness varies and life of LED are much lower. Select reliable Solar Module with a minimum efficiency of 16%, which will give you a life of 20 years. Proper selection of Battery and Electronics. Most of Battery companies including popular brands offer 5 years warranty many time free replacement under warranty is not given on account of poor charging and discharging. Please note that a Simple warranty card of 5 years does not assure the consumer free replacement for 5 years. Do not purchase street light just blindly only based on cost aspect. Be specific, analyse the design aspects of solar module capacity, lamp shade, battery aspects. Many supply sub standard design with improper solar module ( keeping it very less ), give higher rated battery

21 which means the product will die after few months of working at field HOW TO ORDER Please select the model and quanity required and Mail the details to Our normal delivery time is 4 6 weeks. Confirm your Order with your requirement with 50% advance payment and balance against delivery Our Bank Details for - NEFT/RTGS - TRANSFER CITY UNION BANK LTD, THIRUMUDIVAKKAM BRANCH, CHENNAI A/c Name : SOLKAR SOLAR INDUSTRY LIMITED Current A/c No. : IFSC CODE NO. C I U B SOLKAR SOLAR INDUSTRY LIMITED # 13/2, Jayalalakshmipuram I st Street, Nungambakkam Chennai INDIA Tel: , , Fax : ragu@solkar.in. Webmail:

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