SOLAR PHOTOVOLTAIC

pannelli solari dmg arancione

 

DMG operates as certified EPC (Engineering, Procurement and Construction) providing turnkey systems, managing all the necessary activities for the development, licensing, construction and operation of renewable energy plants, ensuring durable quality and efficiency, through its structure capable of delivering O & M services (operation & maintenance) 24/7.

 

DMG’s offer is mainly oriented to the industrial customers who wants to improve the energy efficiency of their factories or buildings, and to investors or utilities that needs a reliable and efficient partner for their investments in renewable energy, contributing to improve the quality of life, producing clean energy and reducing CO2 emissions.

The services offered by DMG includes:

  • Feasibility Study

  • Preparation and obtainment of the authorizations 

  • Preliminary and executive project planning 

  • Procurement 

  • Construction

  • Commissioning 

  • Operation & Maintenance 

In addition to the PV plant DMG, thanks to its Building and Structure Division, takes care of all the activities necessary to restructure the building, the re-construction of the new roof, removal and substitution of all materials including asbestos. The asbestos is a material used for building component, also called eternit or asbestos-concrete, largely used for industrial building roofing and that recently has been declared to be extremely dangerous for human health.

DMG Building division takes care also of the construction and installation of the metal structures. In addition DMG can make an energy audit of the building and offer solutions to improve the energy efficiency of the building.

Photovoltaic’ is a marriage of two words: ‘photo’, from Greek roots, meaning light, and ‘voltaic’, from volt’, which is the unit used to measure electric potential at a given point.

 

Photovoltaic systems use cells to convert solar radiation into electricity. The cell consists of one or two layers of a semi-conducting material. When light shines on the cell it creates an electric field across the layers, causing electricity to flow. The greater the intensity of the light, the greater the flow of electricity is. PV cells are generally made either from crystalline silicon, sliced from ingots or castings,  from grown ribbons or thin film, deposited in thin layers on a low-cost backing. 

There are generally two families of PV power plants: "stand-alone" and "grid-connect".

STAND ALONE OR OFF-GRID

Stand-alone photovoltaic power systems are electrical power systems energised by photovoltaic panels which are independent of the utility grid. These types of systems may use solar panels only or may be used in conjunction with a diesel generator or a wind turbine.

The principal components are: PV module, Stabilizer, Inverter, Battery.

In stand-alone photovoltaic power systems, the electrical energy produced by the photovoltaic panels cannot always be used directly. As the demand from the load does not always equal the solar panel capacity, battery banks are generally used. The primary functions of a storage battery in a stand-alone PV system are:

  • Energy Storage Capacity and Autonomy: To store energy when there is an excees is available and to provide it when required.

  • Voltage and Current Stabilization: To provide stable current and voltage by eradicating transients.

  • Supply Surge Currents: to provide surge currents to loads like motors when required.[4]

GRID CONNECTED

Grid-connected photovoltaic power systems are power systems energised by photovoltaic panels which are connected to the utility grid. Unlike Stand-alone photovoltaic power systems these systems do not have batteries. When conditions are right, the grid-connected PV system supplies the excess power, beyond consumption by the connected load, to the utility grid.[1]

The principal components are: PV module, Inverter, MPPT (Maximum Power Point tracking), Grid Connection equipments.