Solar Street Light Specification Solarbeam (Pty) Ltd
Technical Specifications for Solar LED Road Lighting Solutions
Single Luminaire and Double Luminaire
Pole Specification:
9m Hot Dipped Galvanized with powder coating
Luminaire mounting: 8m, 1m outreach
Withstand 180Kmph Wind factor
Controller mounted in Pole with inspection window, facing walkway
Top mounted with bolts set in concrete
Battery must be mounted in ground with provision for cabling. (IP65 Battery Box)
Concrete Design
Solar Street Light Specification Solarbeam (Pty) Ltd
Pole Specification
Solar Street Light Specification Solarbeam (Pty) Ltd
Technical Specifications for Solar LED Road Lighting Solutions
Typical technical specifications and recommended documentation requirements for solar‐powered LED road lighting
solutions. Requirements for the different key parts are listed separately. For solar, the key concerns include ensuring the
highest efficiency of each part, and how the parts are connected to each other in the most efficient manner, thereby losing
the least amount of energy.
Technical Specifications Luminaire
I. 40W Luminaire and LED Driver (Luminaire Test Standards: IEC/EN 60598‐1, IEC/EN 60598‐2‐3, IEC/EN 62471, IEC 62471‐2, IEC 62778, EN 62493, EN 55015, EN 61547, EN 61000| LED Driver Test Standards : IEC 61347‐1, EN 61347‐2‐13, EN 62384, EN 55015, EN 61547, EN 61000)
Parameters Ideal Specifications Reason/Justification for Recommendation Proof of Technical Compliance
Light Quality and
These parameters will ensure sufficient levels of light
– LM79 Test Report As per CIE standard for – Data Sheet
1 Overall on the road for safety purposes, per end‐user road
road type – Luminaire Supplier Uniformity Ratio specification
Declaration
All quality suppliers today offer ≥100 lm/W system
efficacy for DC‐based luminaires, at which level one
can ensure more than 50% energy savings at the
system level compared to existing HPSV solutions of
even 85 lm/W efficacy. (LEDs provide directional light
resulting in higher light levels on targeted surface for
the same lumen output).
2 System Efficacy ≥100 lm/W There is a difference in efficacy values between AC
– LM79 Test Report and DC luminaires, with the former having lower
efficiency to optimize cost. Meanwhile, DC luminaires
have higher efficacy to optimize the system (i.e. more
efficient luminaires need less energy and hence, will
require smaller solar panel and battery)
NB. Efficacy values of LEDs are rapidly evolving. It is always recommended to consult with a reliable
manufacturer for the latest efficacy levels.
A crisp neutral white colour creates a more inviting
environment
4000 ± 500 K (Neutral In a survey conducted by The Climate Group, the – LM79 Test Report CCT and Colour White) public showed preference for the white light provided
3 – LED Manufacturer Consistency by LEDs over the colour of conventional road lighting,
Declaration <7SDCM as it allowed them to feel safer.36
Better colour consistency prevents visual colour differences between light points
Colour Rendering
A CRI of ≥70 is specified to ensure enhanced ability – LM79 Test Report 4 ≥70 over HPSV (with CRI of 25 to 30) to show true colours of – LED Manufacturer
Index
objects.
Declaration
High pressure die‐cast The specified housing should be long lasting, robust,
– Luminaire Manufacturer’s aluminium w/ heat
5 Housing and with good heat management. Declaration management system in
– Visual inspection of sample light grey colour
Glass has better light transmittance over its lifetime. – Luminaire Manufacturer’s Tempered glass is safer to use; when broken, it
6 Cover Tempered glass cover declaration disintegrates into small pieces. It also protects against
– Visual inspection of sample entry of dust/water & UV rays from the sun
7 Maintenance Tool‐less opening For maintenance cost‐saving, specify for a fixture that
– Visual inspection of sample Replaceable gear tray is easy to open and replace components.
Solar Street Light Specification Solarbeam (Pty) Ltd
Luminaire Specification
Solar Street Light Specification Solarbeam (Pty) Ltd
Description Specification
Luninaire LED 40W
Input Voltage 12V/24V DC; 24V DC
System Lumen Output NW: up to 14200lm
CW: up to 14200lm
System Efficacy Up to 120lm/W
CCT:CRI 75 ± 5
Colour Temperature 4000K(NW),5700K(CW)
Optics DME/ DMMP1
Materials and Finish Housing: Die-cast aluminium
Gasket: Heat resistant silicone rubber
Glass: Tempered Glass
Frame: Grey Paint RAL7040
Luminaire Working temperature -40°C< Ta< 45°C
Lifetime 50,000 hours
(70% lumen maintenance @ Ta = 35°C)
Installation Ø148-160mm pole, side entry
Dimensions (LxBxH) SB371: 422 x 318 x 136mm
SB372: 522 x 318 x 136mm
SB373: 853 x 318 x 136mm
Weight SB371=7kg; SB372=9kg; SB373=15kg
Windage area SB371 0.134m2SBP372 0.166m2; SB373 0.271m2
Recommended mounting height 6-11m
Classifications IP66; IK08; Class I
Surge protection SPD: 2KV
Controls Standalone dimming program
Maintenance Tool-less opening of housing;
Tool-less gear tray change
Certifications CE; CB; IEC 62471
Cable length 9.5m-12.5m
Run Time Extension Optional
Motion Sensor Mode Optional
Solar Street Light Specification Solarbeam (Pty) Ltd
2x 90Wp per Luminary Solar Photovoltaic Module (Test Standards: IEC 61215, IEC 61730)
Parameters
Ideal Specifications
Reason/Justification for Recommendation
Proof of Technical Compliance
Crystalline silicon has a higher charging efficiency than − Data sheet
Solar PV Modules made of
− Panel supplier declaration other current solar cell technologies, thus requiring
poly or mono‐crystalline
− Certificate of testing 1
General smaller solar panels.
silicon solar cells,
showing product
Requirements
The weatherproof connectors provide safe and long
equipped with weather conforming to relevant IEC
lasting connection between the module and other
proof connectors standards.
components.
It is important to have a panel large enough to
− Data sheet
Rated Output
100 -250Wp with tolerance of +- 5W
− PV panel supplier 2 generate electricity that will ensure the actual power
Power
Declaration needed for the luminaire to be operational at night.
− IEC61215 Test Report
Voltage at Rated Output Power is a necessary technical
Voltage at Rated
parameter to identify the panel feature. This − Test report
3 17.5V for each module specification is important to ensure that the battery
Output Power
− Data sheet will be charged. Typical Voltage at Rated Output Power
is 17.5V for solar panels.
Open Circuit Voltage is a necessary technical data to
identify the panel feature. If the open circuit voltage of
Open Circuit
the solar panel exceeds the maximum amount of − Test report
4 22.0V for each module voltage that can be applied to an electrical equipment
Voltage
− Data sheet (e.g. luminaire), the equipment will be damaged or
destroyed. Typical value for open circuit voltage is
22.0V per module.
5 IP Rating
IP 65 for junction box Water‐proof and dust‐proof specifications make the − Test report
IP67 for cable connector
panel and connectors more reliable and last longer.
Solar Street Light Specification Solarbeam (Pty) Ltd
Module Type (Pmax W) Pmax (lmp) Pmax (Vmp) SCC (Ics) (Voc) OpTemp.°C
Wind Load(Pa) Eff
35W 17.5V 35 1,94 18 2,08 22,3 -40 to 85 2.4K 12,80%
45W 17.5V 45 2,53 17,8 2,72 22 -40 to 85 2.4K 12,60%
55W 17.5V 55 3,08 17,8 3,28 22,1 -40 to 85 2.4K 13,20%
70W 17.5V 70 3,89 18 4,15 22,3 -40 to 85 2.4K 13,80%
85W 17.5V 85 4,71 18,1 4,99 22,4 -40 to 85 2.4K 14,30%
95W 17.5V 95 5,23 18,2 5,59 22,5 -40 to 85 2.4K 14,30%
120W 17.5V 120 6,8 17,7 7,36 22,7 -40 to 85 2.4K 14,30%
145W 17.5V 145 7,99 18,2 8,47 22,5 -40 to 85 2.4K 14,50%
175W 35V 175 4,8 36,4 5,06 45,07 -40 to 85 2.4K 15,00%
190W 35V 190 5,23 36,4 5,59 45 -40 to 85 2.4K 14,70%
285W 35V 285 8,02 35,5 8,5 45,3 -40 to 85 5.4K 14,60%
290W 35V 290 8,1 36,3 8,62 45,3 -40 to 85 5.4K 14,90%
295W 35V 295 8,12 36,3 8,63 45,3 -40 to 85 5.4K 15,10%
Module Type Cell Capsulate Weight (Kg) a mm b mm c mm d mm e mm t mm
35W 17.5V 36/78x78 EVA 3,27 510 535 476 295 900 25
45W 17.5V 36/156x52 EVA 4,23 660 540 626 280 900 25
55W 17.5V 36/156x62.4 EVA 4,79 660 630 626 315 900 25
70W 17.5V 36/156x78 EVA 6,2 660 770 626 390 900 25
85W 17.5V 36/156x93.6 EVA 6,61 660 900 626 450 900 25
95W 17.5V 36/156x104 EVA 7,65 660 1010 626 510 900 25
120W 17.5V 36/124.8x156 EVA 9,31 660 1270 631 630 900 25
145W 17.5V 36/156x156 EVA 10,81 680 1470 646 870 900 25
175W 35V 72/156x93.6 EVA 13,5 990 1182 956 682 900 35
190W 35V 72/156x104 EVA 14,1 990 1310 946 680 900 40
285W 35V 72/156x156 EVA 26,8 990 1970 946 577 1200 50
290W 35V 72/156x156 EVA 26,8 990 1970 946 577 1200 50
295W 35V 72/156x156 EVA 26,8 990 1970 946 577 1200 50
Cable Specification
Maximum working voltage DC1000V
Rated Current 30A
Flame class UL94-V0
Shell Protection degree IP67
Cable 4mm2
Ambient temperature range -40~+85。C
Safety Level Class II
Insertion force 50N
Withdrawal force 50N
Cable length 12.5m/11m/
7.5m
Solar Street Light Specification Solarbeam (Pty) Ltd
20amp MPPT Charge Controller (Test Standards: EN 62109‐1, EN 55015, EN 61547, EN 61000)
The Charge Controller is considered the “heart of the system” that regulates the flow of current in the system and starts the light when it detects darkness. It controls power harvested from the PV panel to charge the battery, with the intent of safely and reliably maintaining battery life and a high state of charge. Multiple stages of battery charging protect the battery from over‐discharging, thereby extending battery life. The charge controller also controls the power available from the battery, with the intent of limiting the depth of battery discharge to prolong battery life.
Parameters Ideal Specifications Reason/Justification for Recommendation Proof of Technical Compliance
Charge controllers affect the energy efficiency of the system as well as the life of the battery, a key and
Designed to match the expensive component. It is important to ensure that
the controller is compatible with the system (panel,
− Test certificates from proposed solar PV module,
battery, luminaire) to achieve optimal performance.
battery, and LED drivers. international accredited
General Controllers are not typically bought off the shelf.
1 testing and certification
Low‐quality charge controllers that are not properly
Requirements To have a clear and reliable
organization providing
LED or Liquid Crystal configured with other components could result in multiple stages of battery Display that indicates early failures of the solar lighting installation. charging. operating status. The operating status indication is important and
convenient for field installation, monitoring, and
debugging.
Nominal Auto voltage detection offers the customer the
− Datasheet 2 Charge 12/24V DC Auto flexibility to put it into 12V or 24V system without
Voltage pre‐configuration.
Operating
A wide range of operating temperature provides
− Datasheet 3 ‐40°C to 60°C stable performance for aggressive outdoor
Temperature
applications in different locations.
Solar Street Light Specification Solarbeam (Pty) Ltd
250Ah Battery per Luminary (4 day Autonomy) (Test Standard: IEC 61427)
Parameters
Ideal Specifications
Reason/Justification for Recommendation Proof of Technical
Compliance
Shall be sealed
Lead‐acid and gel batteries are commonly used types of batteries for solar road lighting installations.
maintenance‐free lead‐
However, Gel batteries have longer cycle lifetime,
− Test certificates from acid or gel type battery.
longer storage time, and better deep discharge
international accredited General recovery ability.
1 Fully‐sealed testing and certification Requirements
Maintenance‐free gel organization Maintenance‐free batteries allow for savings in
battery
− Datasheet maintenance costs. The make, type, nominal voltage,
and nominal capacity must be available from battery
manufacturer/ recognized test lab.
Specifying for maximum capacity ensures that the
battery can store enough power to support the
operation of the lighting system.
In addition, when evaluating bidders with similar capacity (i.e. 250Ah), consider the rate of discharge
(CX, where x is the number of hours before the battery
gets discharged). Usually, discharge rates are C10 or
C20. Thus, a 250Ah C10 battery discharges 25A every
2
Rating Capacity Maximum capacity hour for 10 hours.
− Datasheet 12V/250Ah or 24V/250Ah
To illustrate, suppose a load profile of a road lighting
tender is 10A for 10 hours and the tender only indicate
the rating capacity (e.g. 100Ah). Then, Manufacturer A
offered a 105Ah C10 battery (10.5A/hour discharge
rate) and Manufacturer B offered a 109Ah C20 battery
(5.45A/hour discharge rate). Evidently, while both
meet the required rating capacity, only manufacturer
A is capable of supporting the load profile of the
tender.
Average Self‐
Average self‐discharge rate should be as specified to
− Data sheet/ test report 3
≤3% per month at 25°C
minimize the impact on the remaining capacity of the
Discharge Rate
battery
Batteries to be supplied
Dust and water ingress will impact the battery capacity
Protection Class
in a box with protection − 3rd party test report /
4 A Class of at least IP68, and lifetime. Sufficient IP protection will prolong battery
(Under or above which ensures batteries
capacity and lifetime.
certification ground)
not damaged if 1.3m
underwater for 30 days.
Solar Street Light Specification Solarbeam (Pty) Ltd
Parameters
Ideal Specifications
Reason/Justification for Recommendation
Proof of Technical Compliance
Batteries to be supplied Dust and water ingress will impact the battery capacity − 3rd party test report /
4B 4B Protection Class in a box or a suitable and lifetime. Sufficient IP protection will prolong battery
enclosure with protection
capacity and lifetime.
certification
(on the pole)
Class of at least IP65
Higher temperatures impact the battery’s service
Operating
Charge (‐22°C to 55°C) lifetime while lower temperatures impact the battery’s
5
Discharge (‐10°C to 55°C)
actual capacity. A wider range of operating
− Datasheet
Temperature Storage (‐22°C to 55°C) temperature can prolong battery lifetime and
guarantee battery performance.
As batteries charge and discharge, a small amount of − Graphical information on
Cycle life of the battery
damage is done to them. The amount of damage
6 cycle life versus depth of
must exceed 700 cycles depends on the type of battery and how deep the
discharge (at specified
Cycle Life when discharged down discharge is. Batteries are lab‐tested to determine how
temperatures)
to an average depth of many cycles the battery can experience before it
discharge (DOD) of 50% reaches its residual life. These cycle test results are an − Datasheet
excellent way of comparing batteries.
Battery Capacity at 77°F (25°C) 100Ah 120AH 150Ah 200AH 250AH
Rated Voltage 12v 12v 12v 12v 12v
Cells 6 6 6 6 6
Discharge rate @ 10hrs 10.0A,10.8V 12.0A,10.8V 15.0A,10.8V 20.0A,10.8V 25.0A,10.8V
Working Temperature Range
Charge ‐20° ‐̴50°C
Discharge ‐10° ‐̴50°C
Storage ‐20° ‐̴50°C
Average-Self discharge Rate, p/m (25°) ≤2%
Max Charge Current 20A 24A 30A 40A 62.5A
Temperature Compensation 18 ~ 24 mV/ºC/pcs
Solar Street Light Specification Solarbeam (Pty) Ltd
V. Other Specifications
Parameters Ideal Specifications Reason/Justification for Recommendation Proof of Technical Compliance
Shall be provided with complete set of wiring
Waterproof accessories especially for outdoor − 3rd party lab
1
Accessory and terminals with a
minimum of IP67 applications will ensure longer lifetime and enhance report/certification
system mechanical and electrical performance.
protection class, mast‐
arms, and brackets.
Any system
2
Wind Load Rating
equipment/component The system should be able to endure the critical – 3rd party lab
in the pole shall conditions in outdoor environment. report/certification
withstand a max wind load of 2.0Pa (57 m/s).
3 Battery capacity 4 days autonomy The battery last at 4days in case of inclement weather Warranty
Min. of 5 years from date
of delivery. Warranty
for the full Warranty gives customers good service within a
− Warranty paper 3 Warranty
system (luminaire,
guaranteed period of time.
charge controller, PV
panel, battery, and other
accessories.
Solar Street Light Specification Solarbeam (Pty) Ltd