Description

TECHNICAL SPECIFICATIONS FOR 12 W WHITE-LED BASED SOLAR STREET
LIGHTING SYSTEM

Sr. No Components Specification for Solar street light fitting

1. PV module 75 Wp under STC
2. Battery Minimum 12.8V, 30 AH capacity Lithium Ferro Phosphate
battery.
3. Light Source White Light Emitting Diode (W-LED)
12 Watt, W-LED luminaire, dispersed beam, soothing to eyes
with the use of proper optics and diffuser.
LED Chip should be compliance to IES: LM-80 (Approved
Method for Measuring Lumen Maintenance of LED Light
Sources and LED lumen depreciation time to L70). Test report
for same should be submitted.
4. Light Out put The luminaire must use high efficacy W-LED with minimum
135 lumens per watt (and UV free). [A certificate to be
submitted by the System supplier to the Test Lab during
certification]
For single light level:
Minimum 24 Lux when measured at a point 4 meters below the
light. The illumination should be uniform without dark bands or
abrupt variations, and soothing to the eye. Higher light output
will be preferred.

For Multiple Light levels:
The luminaire should have two levels of light to take care of
different lighting needs during the night. Minimum 24 Lux
when measured at a point 4 meters below the light (at’’ High’’
illumination level). The illumination Should be uniform
without dark bands or abrupt variations. Minimum 12 Lux at
lower illumination level.
(Higher light output will be preferred)

The luminaire shall be tested for Electrical, Photometry and
Color parameters as per IES LM-79:2008 or IS: 16106:2012 for
following performance parameters like:
1) Total luminous flux: ≥ 1500 lm.
2) Luminous efficacy (i.e. system efficacy): ≥ 125 lm/W.
3) Color Temperature: Between 5500 K to 6500 K.
4) CRI ≥ 70
5) Luminous intensity distribution should follow the batwing
patterns in polar curves.
6) Require validation report using .ies file, which is generated
during luminous intensity distribution test and using
maintenance factor 0.9 and pole height of 4m., Road width 5m
and Pole span 15m. The average illuminance level and
uniformity should comply with requirement as per IS 1944,
wherever applicable.
7) The luminaire should be tested for all type tests as per IS
10322 Part 5 Sect 3 or IEC 60598-2-3 standards.
5 Mounting of
light
Pole height 5 m above the ground level and 1 m below the
ground. Luminaire shall be at least 4.5 m above the ground level.
6 Electronics
Efficiency
Overall total Efficiency of the Electronics should be Minimum
90%
7 Duty Cycle Dusk to dawn:
First 4 Hours full light (Min. 24 Lux), rest of the time at lower
light (50%, Min. 12 Lux) level.
(Higher light output will be preferred)
8 Autonomy 3 days or Minimum 36 operating hours per permissible
discharge with fully charged Lithium-Ferro Phosphate Battery.
9 Ingress
Protection – IP
Optical and Control gear compartment – IP 65 / IP 66
10 Impact resistance
of casing
≥ IK 08
11 Radiated
Emission Test
As per CISPR-15

12 ESD (Electro
Static Discharge)
and Radiated
susceptibility test
As per IEC 61547

TECHNICAL DETAILS:
PV MODULE
i. Indigenously manufactured PV module should be used.
ii. The PV module should have crystalline silicon solar cells and must have a certificate of
testing conforming to IEC 61215 Edition II / BIS 14286 from an NABL or IECQ
accredited Laboratory.
iii. The power output of the module under STC should be a minimum of 75Wp.
iv. The module efficiency should not be less than 14 %.
v. The terminal box on the module should have a provision for opening it for replacing the
cable, if required.
vi. There should be a Name Plate fixed inside the module which will give:
a. Name of the Manufacturer or Distinctive Logo.
b. Model Number
c. Serial Number
d. Year of manufacture
vii. A distinctive serial number starting with NSM will be engraved on the frame of the
module or screen printed on the tedlar sheet of the module.

BATTERY
i. Minimum 12.8V, 30 AH capacity Lithium Ferro Phosphate Battery.
ii. Battery pack should have proper ‘Battery management System’ (BMS) for cell balancing,
over charge and over temperature protection.
iii. Battery should conform to the latest BIS/ International standards.

LIGHT SOURCE
i. The light source will be a white LED type.
ii. The colour temperature of white LED used in the system should be in the range of
5500oK–6500oK.
iii. W-LEDs should not emit ultraviolet light.
iv. The light output from the white LED light source should be constant throughout the
duty cycle.
v. The lamps should be housed in an assembly suitable for outdoor use.
vi. The temperature of heat sink should not increase more than 20oC above ambient
temperature during the dusk to dawn operation.

ELECTRONICS
i. The total electronic efficiency should be at least 90 %.
ii. Charge controller should be MPPT Type.
iii. Electronics should operate at an appropriate voltage suitable for proper charging of the
battery.
iv. No Load current consumption should be less than 20 mA.
v. The PV module itself should be used to sense the ambient light level for switching ON
and OFF the lamp.
vi. The PCB containing the electronics should be capable of solder free installation and
replacement.
vii. Necessary lengths of wires/cables, switches suitable for DC use and fuses should be
provided.

ELECTRONIC PROTECTIONS
i. Adequate protection is to be incorporated under “No Load” conditions e.g. when the
lamp is removed and the system is switched ‘ON’.
ii. The system should have protection against battery overcharge and deep discharge
conditions.
iii. The System should have protection against short circuit conditions.
iv. Protection for reverse flow of current through the PV module(s) should be provided.
v. Adequate protection should be provided against battery reverse polarity.
vi. Load reconnect should be provided at 80% of the battery capacity status.
MECHANICAL COMPONENTS
I. A corrosion resistant metallic frame structure should be fixed on the pole to hold the SPV
module.
II. The frame structure should have provision so that the module can be oriented at the
suitable tilt angle.
III. Pole should be Hot dip galvanized pipe as per IS1161 & IS4736 i.e. Class B.
IV. Pole height 5 m above the ground level and 1 m below the ground. Luminaire shall be at
least 4.5 m above the ground level.
V. The pole should have the provision to hold the luminaire.
VI. The battery shall be either included in the luminaire enclosure, which should be water
proof (IP 65) and corrosion resistant or outside the luminaire enclosure in a vented, acid
proof and corrosion resistant, hot dip galvanized metallic box (IP 65) with anti-theft
locking arrangement for outdoor use.
INDICATORS
 The system should have two indicators, green and red.
 The green indicator should indicate the charging under progress and should glow only
when the charging is taking place. It should stop glowing when the battery is fully
charged.
 Red indicator should indicate the battery “Load Cut Off” condition.

QUALITY AND WARRANTY
i. The street lighting system (including the battery) will be warranted for a period of five
years from the date of supply.
ii. The PV module(s) will be warranted for a minimum period of 25 years from the date of
supply. The PV modules must be warranted for their output peak watt capacity, which
should not be less than 90% at the end of Ten (10) years and 80% at the end of Twenty
five (25) years.
iii. The Warranty Card to be supplied with the system must contain the details of the system.
OPERATION and MAINTENANCE MANUAL
An Operation, Instruction and Maintenance Manual, in English and the local language, should be
provided with the Solar Street Lighting System. The following minimum details must be
provided in the Manual:
o Basic principles of Photovoltaics.
o A small write-up (with a block diagram) on Solar Street Lighting System – its
components, PV module, battery, electronics and luminaire and expected
performance.
o Type, Model number, Voltage & capacity of the battery, used in the system.
o The make, model number, country of origin and technical characteristics
(including IESNA LM-80 report) of W-LEDs used in the lighting system.
o About Charging and Significance of indicators.
o Clear instructions about erection of pole and mounting of PV module (s) and lamp
housing assembly on the pole.
o Clear instructions on regular maintenance and troubleshooting of the Solar Street
Lighting System.
o DO’s and DONT’s.
o Name and address of the contact person for repair and maintenance, in case of
non-functionality of the solar street lighting system.

List of BIS standards applicable for components of Solar PV Applications

Sl. No.
(1)
Product
(2)
Indian
Standard
Number
(3)
Title of Indian Standard
(4)
1. Crystalline Silico
n
Terrestrial
Photovoltaic
(PV) modules
(Si wafer based)
IS 14286 Crystalline Silicon Terrestrial Photovoltaic
(PV) modules – Design Qualification And
Type Approval
2. Thin Film
Terrestrial
Photovoltaic
(PV)
Modules (a-Si,
CiGs and CdTe)
IS 16077 Thin-Film Terrestrial Photovoltaic
(PV) Modules – Design Qualification
and Type Approval
3. PV Module ( Si
wafer and Thin
film)
IS/ IEC
61730
(Part 1)
IS/ IEC
61730
(Part 2)
Photovoltaic (PV) Module
Safety Qualification Part 1 Requirements
for Construction
Photovoltaic (PV) Module
Safety Qualification Part 2 Requirements
for Testing
4. Power converters
for use in
photovoltaic
power system
IS 16221
(Part 1)

IS 16221
(Part 2)
Safety of Power Converters for use
in Photovoltaic Power Systems Part 1-
General Requirements
Safety of Power Converters for Use
in Photovoltaic Power Systems Part 2-
Particular Requirements for Inverters
5. Storage batteries IS 16270

IS 16046
Secondary Cells and Batteries for
Solar Photovoltaic Application GeneralRequirements and Methods of Test

Standard for Lithium ion battery
6. LED Lights
& Luminaires
IS 16101

IS 16102

IS 16103

IS 16107
General Lighting – LEDs and LED modules –
Terms and Definitions

Self-Ballasted LED Lamps for General Lighting
Services

Led Modules for General Lighting

Luminaires Performance