sources and the connected loads in a single entity for efficient working of telecom sites. The entity is an enclosed metallic structure consisting of load controller, charge controllers, rectifier modules and sensors with indicators.

BACKGROUND AND PRIOR ART
The need for clean and sustainable energy has risen steadily with the depletion of fossil fuels and general awareness about the impact on the environment.

Use of renewable energy in India has increased tremendously over the past 10 years. Solar energy has occupied a major role in the power production, both in rural and urban areas. Though the maximum efficiency of solar panels is 23%, their use reduces the dependency on electricity grids to a great extent. It also serves as a good substitute for fossil, fuels and oil reserves which are getting extinct and becoming more scarce.

A solar site generally has the following components for photovoltaic system installation - PV panels, battery for storing excess energy, charge controllers which determine and control the battery operation, load controller for distributing the input energy to the loads to a constant level and inverter for converting the direct current (DC) output from the PV panel to alternating current (AC) power. The main components in a telecom site consists of a tower, communication equipment, a generator that is used as source of power and a shelter for storing materials such as a battery bank which is used as storage of excess energy.

It is important to keep these devices at a safe location for proper functioning and increased lifetime. In the prior art, several of these devices are located separately over a considerable area. This leads to difficulty in monitoring and maintenance of the different devices. Moreover, the chances of theft and pilferage, go up. So, periodic observation of the devices becomes easier if they are placed at a common point.

The present invention seeks to overcome the above drawbacks of the prior art. In this invention, a single entity, which is a metallic box, accommodates all the components. It is called the GeEMS cubicle, which also provides protection from theft.

OBJECTS OF THE INVENTION
The main object of the present invention is to provide a single entity, which is a metal cubicle, to house different components of Green energy and Energy Management System, which are located distributed over a telecom site, at a common location.

Another object of the present invention is to provide a system which is compact, easy to maintain and extracts maximum power from solar radiation.

Another object of the present invention is to provide a system which is able to measure and control different functions such as charging and discharging of battery and distribution of AC and DC voltages.

Another object of the present invention is to provide a system which senses the availability of voltage, current, power, energy and output of electricity grid.

Another object of the present invention is to provide a system which selects the source of power between electricity grid and AC diesel generator, in the absence of solar energy.

Another object of the present invention is to provide a system which senses generator operation including the availability of fuel and capacity.

Another object of the present invention is to provide a system which controls the flow of input voltage to the electrical loads.

How the foregoing objects are achieved will be clear from the following description. In this context it is clarified-that the description provided is non-limiting and is only by way of explanation.

SUMMARY OF THE INVENTION
A Green energy and Energy Management System is enclosed in a single entity which is a metallic cubicle. The cubicle comprises of charge controllers positioned in the lower portion of the cubicle, rectifier modules and switchgears and protection devices positioned in the upper portion, sensors with digital indicator, load controller and programmable logic controller positioned in the middle portion, AC bus at the bottom, DC bus at the top, AC cable entry at the bottom and DC cable entry at the top of the cubicle. The AC cables are terminated at the AC breakers and AC contactors and the DC cables are terminated at the DC breakers and battery fuses.

The charge controller is a maximum power point tracking (MPPT) charge controller which regulates DC current and voltage to the loads fed through the common DC bus.

The programmable logic controller communicates with ,all the devices for the selection between the electricity grid and AC diesel generator power in the absence of solar energy.

The DC Load Controller is an electronic device placed between the DC bus and the loads, which controls the voltage from the energy source (input) to the connected loads (output).

The DC cable entry is situated near LED indicators and smoke detector with support of said DC breakers.

A three ppint lock and pad lock bracket is provided at both front and rear sides of the doors of the cubicle as an anti-theft measure.

BRIEF DESCRIPTION OF THE ACCOMPANYING DRAWINGS
The nature and scope of the present invention will be better understood from the accompanying drawings, which are by way of illustration of a preferred embodiment and not by way of any sort of limitation. In the accompanying drawings:-

Figure 1 is a front view of the cubicle of the Green energy and Energy Management System (GeMS) according to the present invention.

Figure 2 is a photographic front view of the DC Load Controller installed in the cubicle shown in figure 1.

Figure 3 is a functional block diagram illustrating the operation of the system according to the present invention.

DETAILED DESCRIPTION OF THE INVENTION
Having described the main features of the invention above, a more detailed and non-limiting description of a preferred embodiment will be given in the following paragraphs with reference to the accompanying drawings.

In all the figures, like reference numerals represent like features. Further, the shape, size and number of the devices shown are by way of example only and it is within the scope of the present invention to change their shape, size and number without departing from the basic principle of the invention.

Further, when in the following it is referred to "top", "bottom", "upward", "downward", "above" or "below", "right hand side", "left hand side" and similar terms, this is strictly referring to an orientation with reference to the apparatus, where the base of the apparatus is horizontal and is at the bottom portion of the figures. The number of components shown is exemplary and not restrictive and it is within the scope of the invention to vary the shape and size of the apparatus as well as the number of its components, without departing from the principle of the present invention.

All through the specification including the claims, the technical terms and abbreviations are to be interpreted in the broadest sense of the respective terms, and include all similar items in the field known by other terms, as may be clear to persons skilled in art. Restriction or limitation if any referred to in the specification, is solely by way of example and understanding the present invention.

Figures 1 through 3 illustrate the Green energy and Energy Management System (GeEMS) cubicle (A) with DC Load Controller according to the present invention.

Referring.to figure 1, the cubicle (A) comprises of charge controllers (1), rectifier modules (2), switchgears and protection devices (3) and sensors (4) with digital indicator (5). The AC and DC cables are entered through AC cable entry (6) and DC cable entry (7) respectively.

Figure 2 is a photographic view of the DC Load Controller (11) which is accommodated
within the cubicle (A), as best shown in figure 1. This unit incorporates digital indicator (5) and a plurality of LED indicators (12).
As shown in figure 3, power from the solar photovoltaic panels (PV) flows to the maximum power point tracking (MPPT) charge controllers (1) which regulates DC current and voltage to the loads, which is fed through the common DC bus (8). A programmable logic controller (9) communicates with all the devices for the selection between the electricity grid and AC diesel generator (DG) power, which is converted to DC from AC using rectifiers (2) through common AC bus (10), in the absence of solar energy. The output from the programmable logic controller (9) controls the flow of electric power (both current and voltage) to the connected loads (L) in addition to charging and discharging of the batteries (B) which are used as a backup in the remote sites. The DC load controller (11) is an electronic device that is placed between the DC bus (8) and the loads (L) and controls the voltage from the energy source (input) to the connected loads (output). The operation of the DC load controller (11) does not affect the functioning of the batteries (B) by electronically isolating the connection from loads (L) to the batteries (B).

The DC cable entry (7) is situated near the LED indicators (12) and smoke detector (13) with support of DC breakers (14).The DC cables entered through the DC cable entry (7) are terminated at the DC breakers (14) and battery fuses (15).Through the AC cable entry (6) the AC cables are terminated at the AC breakers (16) and AC contactors (17). The output of the DC breakers (14) and AC breakers (16) are connected to the charge controllers (1) and rectifiers (2); both the devices are connected to the programmable logic controller (9). The programmable logic controller (9) is programmed to control and measure the voltages across the load. Current-transformers (18) and current measuring devices (19) with surge protection devices (3) are placed in suitable positions so that they do not disturb the working of exhaust fans (20). Proper ventilation and circulation is provided for maintaining the temperature inside the cubicle (A). As part of safety, LED indicators (12) and smoke detector (13) are used in the cubicle (A).

The cubicle (A) is provided with a three-point lock and pad lock bracket at both front and rear sides of the doors of the cubicle as an anti theft measure.

Advantages:
The system according to the present invention has many advantages, some of which are noted below. It may be clearly understood that this list is a non-limiting one.
it provides a single entity to house its various components, located distributed at a site, at a common location so that the system is compact, easy to maintain and extract maximum power from solar radiation.

a programmable logic controller consisting of multiple input and output ports measures and controls different functions such as charging and discharging of batteries and distribution of AC and DC power.

provides a healthy phase selector card for sensing the availability of voltage, current, power, energy and output of electricity grid, for which appropriate signals are given to the controller.

provides Auto Mains Failure(AMF) logic to select the source of power from electricity grid or AC diesel generator, in the absence of solar energy.

provides Gen Card for sensing generator operation including the availability of fuel and capacity.
rectifier modules have energy saving features with maximum efficiency and wide AC input range.

charge controllers have high efficiency which ensures an increase in the PV array output.

DC Load Controller provided for controlling the input voltage to the electrical loads.

sensors and alarms provided for the efficient working of equipment in the telecom sites.

incorporates an anti-theft system with three-point locks and pad lock brackets at front and rear sides of the doors for secure the equipment within the cubicle.

The present invention has been described with reference''-to some drawings and a preferred embodiment purely for the sake of understanding and not by way of any limitation and the present invention includes all legitimate developments within the scope of what has been described herein before and claimed in the appended claims.

I claim:
l.A Green Energy and Energy Management System enclosed in a single entity which is a metallic cubicle (A), the cubicle comprising of charge controllers (1) positioned in the lower portion of the cubicle, rectifier modules (2), switchgears and protection devices (3) being positioned in the upper portion, sensors (4) with digital indicator (5), DC Load Controller (11) and programmable logic controller (9) being positioned in the middle portion, AC bus (10) at the bottom, DC bus (8) at the top, AC cable^entry (6) at the bottom and DC cable entry (7) at the top of the cubicle, the AC cables being terminated at the AC breakers (16) and AC contactors (17) and the DC cables being terminated at the DC breakers (14) and battery fuses (15).

2.The system as claimed in claim 1, wherein said charge controller (1) is a Maximum Power Point Tracking (MPPT) charge controller which is adapted to regulate DC current and voltage to the loads fed through said common DC bus (8).

3.The system as claimed in claim 1, wherein said programmable logic controller (9) is adapted to communicate with all the-devices for the selection between the electricity grid and AC diesel generator (DG) power in the absence of solar energy.

4.The system as claimed in claim 1, wherein said DC Load Controller (11) is an electronic device placed between the DC bus (8) and the loads (L) and is adapted to control the voltage from the energy source (input) to the connected loads (output).

5.The system as claimed in claim 1, wherein said DC cable entry (7) is situated near LED indicators (12) and smoke detector (13) with support of said DC breakers (14).

6.The system as claimed in claim 1, wherein a three-point lock and pad lock bracket is provided at both front and rear sides of the doors of the cubicle as an anti-theft measure.