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SOLAR STREET LIGHTING SYSTEM
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
SOLAR STREET LIGHTING SYSTEM
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.
SOLAR STREET LIGHTING SYSTEM
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 .
1.4. CHARGE CONTROLLER AND ELECTRONICS
SOLKAR – manufacturing CHARGE CONTROLLER for
different applications since 1992. These are made with
latest designs , components and easy to service and
replace with highest reliability.
SOLAR STREET LIGHTING SYSTEM
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 6 12 10
Wattage per LED 1 1 1.6
Lumen /WATT 100 100 120
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: 5000-
7000k, Warm White:
3000-4000k
Pure White: 5000-
7000k, Warm White:
3000-4000k
Pure White: 5000-
7000k, Warm White:
3000-4000k
CRI >70 >70 >70
Driver Efficiency >85% >85% >85%
Driver Constant Current Constant Current Constant Current
LED life
40 000 hours 70%
lumen
maintenance @
Ta=36°C:
40 000 hours 70%
lumen
maintenance @
Ta=36°C:
40 000 hours 70%
lumen
maintenance @
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 1 1.5 1.5
INGRESS PROTECTION –
IP 65 65 65
Light Body& Lampshade PC with integrated
Heat sink
Aluminium Die Cast
and PC
Aluminium Die Cast
and PC
SOLAR STREET LIGHTING SYSTEM
COMPARISON OF BRIGHTNESS VS HEIGHT FOR 3 DOMES
6 W DOME BRIGHTNESS
12 W DOME BRIGHTNESS
24 W DOME BRIGHTNESS
SOLAR STREET LIGHTING SYSTEM
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.
SOLAR STREET LIGHTING SYSTEM
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 Auto On / Off
Charge Control Low Cut Off
Auto On / Off Charge Control
Low Cut Off
7 Pole – Ref drawing
MS 2” DIA
MS 2” DIA
8
Application-suitable for
Private Road / Peripheral Lights
Private Road / Peripheral Lights
9 Price-Each Rs.15,000.00 Rs.26,000.00
• The above Price does not include GST @ 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
SOLAR STREET LIGHTING SYSTEM
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.
SOLAR STREET LIGHTING SYSTEM
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 10.00 pm and only alternate lights works from 10.00 pm to 6.00 am. It is also possible to make all the lights work with full brightness from 6.00 pm to 10.00 pm and 1/3 brightness from 10.00 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.
SOLAR STREET LIGHTING SYSTEM
• WARRANTY :
The solar Modules are warranted for 10 years , Lamp Dome – 1 year , Battery – 3 years , Electronics and charge controller – 3 years
SOLAR STREET LIGHTING SYSTEM
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.
SOLAR STREET LIGHTING SYSTEM
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
SOLAR STREET LIGHTING SYSTEM
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 12 6 6 12 6 6
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 GST @ 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.
SOLAR STREET LIGHTING SYSTEM
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
SOLAR STREET LIGHTING SYSTEM
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
SOLAR STREET LIGHTING SYSTEM
SOLKAR SOLAR INDUSTRY LIMITED
# 13/2 , Jayalalakshmipuram I st Street, Nungambakkam
Chennai-600 034. INDIA
Tel: +91 44 28274142,28271819 , Fax : +91 44 28273435
Email : [email protected]. Webmail: www.solkar.in
– 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 [email protected] 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 - 600 044 A/c Name : SOLKAR SOLAR INDUSTRY LIMITED Current A/c No. : 4 0 0 1 0 9 0 0 0 2 1 0 2 8 8 IFSC CODE NO. C I U B 0 0 0 0 4 0 0