Photovoltaic energy is the best solution for public lighting in areas which are isolated from the electrical grid, or where its use is expensive or difficult.
A public lighting system using a stand-alone street lamp is composed with the following elements.
BRIEF DESCRIPTION OF THE SPARE PARTS
- Photovoltaic modules: usually one module of 120 or 130 Wp is used, but if necessary 3 modules can be installed.
- Batteries: the system uses two batteries 210 Ah-6V (for 12 V system). No maintenance is needed, and they have a long life of about 15 years.
- Regulation and control system: the street lighting regulation and control system has been specifically designed for solar street lights. It employs a micro-controller for battery charge/discharge management. The twilight switch allows a timed consumption output in function of the amount of sunlight. System programing provides a control that is able to
automatically adapt itself to the various possible situations, enabling the user to adjust the
time of connection, in accordance with the consumption.
Physical specifications of the regulator |
| Heigth |
215 mm |
| Width |
155 mm |
| Length |
82 mm |
| Weight |
0.7 kg |
| Isolation |
1P - 56 |
| Electrical specifications |
| Rated consumption |
20 mA |
| Best resolution at mesurements |
1 % |
| Rated voltage |
12 - 24 V |
| Maximum consumption current |
10 A |
| Maximum load current |
10 A |
| Final
load voltage at 25º |
12
V |
24
V |
| C 100 |
14.5 V |
29 V |
| C 50 |
14.6 V |
29.2 V |
| C 20 |
15 V |
30 V |
| C 10 |
15.1 V |
30.2 V |
Initial floating range
at 25ºC: (Note 1)
13.6 V - 13.9 V |
27.2 V - 27.8 V |
| Re-entry regulation & floating at 25ºC: 12.9 V |
25.8 V |
| Load reconnection at 25ºC: 12.5 V |
25 V |
Load
disconnection at 25ºC
(*Note 2)
|
12 V |
24 V |
| C 100 |
11.4 V |
22.8 V |
| C 50 |
11 V |
22 V |
| C 20 |
10.9 V |
21.8 V |
| C 10 |
10.8 V |
21.6 V |
*Note 1: Additionally, in function of the battery
load log.
*Note 2: The low voltage alarm shall be 0.05
V/element.
- Light spole: the most usual kind of ilumination that we need is the fluorescent lamp PL 36 or one of 35 W of sodium vapor. The lamp and the reactance are into the spole in order to be protected.
- Pole: made of steel and designed to support the wind charge. The batteries and the control equipment are in the basis. The pole has also one arm to put the photovoltaic modules. It is finished with a complete galvanization to be protected against the environmental damage and it can also be painted to make its implantation more elegant. The room for the batteries also has a security system.
INSTALLATION AND MAINTENANCE
The complete system of our solar street lights is very simple, easily and quickly installable and without maintenance needed.
- Foundation: 0.8 x 0.8 x 0.8 m.
- Installation: It´s very easy and it only takes
about 30-45 minutes for each solar street light.
It´s not necessary to use a crane.
- Maintenance: The batteries do not need any maintenance. It is one of the advantages that our system has. Because, although the maintenance of the traditional batteries is too easy, our experience taught us that it is never made in the correct way. The result of this is that the customers say that it does not work at all. With our system, we avoid that kind of complains.
ADVANTAGES OF OUR SYSTEM OF STREET LIGHTING
- Very easy and quick installation.
- No maintenance needed..
- The batteries are installed in the foundation, so they can not be stolen..
- The batteries have a very long life: about 15 years. The traditional batteries only have between 7-10 years..
- The place can be changed when the customer wants. It only needs a new foundation.
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