RES Solar Roof Project India


PV System - Uninterrupted Power Supply
and water treatment plant

The Intech company has maintained contact for many years with the cooperatively organized MTRDS organization whose goal is to improve the lives and future prospects of rural families by helping people to help themselves. This is done by granting micro credits, as well as providing learning opportunities in the field of accounting, IT, food, health, agriculture, craft skills, and more. The center of the organization is an education center in Narketpally which has an auditorium, classrooms, offices, and bedrooms.

There are about 700 registered villages in Andhra Pradesh, whose drinking water has a too high fluoride content. This leads to growth retardation, physical crippling and constant pain. In the education center area and in the overall Nalgonda district, there is no constant power source. They experience power outages several times a day that often last for hours. Therefore, training courses which require electricity, such as computer courses, are difficult to organize. There are now in India a large number of photovoltaic systems, which were built mainly with network coupling (due to funding by the respective States). In the Nalgonda area, there are no known plants due to lack of funding.

    The aim of this project is to implement two major improvements to provide:

  • An uninterruptible power supply for the education center through the installation of an 8 kW PV island system.
  • Safe drinking water through the installation of a water treatment plant to eliminate the excessive salinity and fluoride content in the water.

PV system

PV system with uninterruptible power supply (UPS)

The education center has a single-phase power supply with an in-house protection of 16 A. The photovoltaic system will be installed on the roof of the education center. The inverters will be placed on the roof. The stand-alone inverter will be placed in the hall of the education center near the battery compartment.

The photovoltaic system was designed on the basis of the existing electricity consumption on an inverter AC output of 8 kW. The optimal matching between the PV modules and inverters results in a DC module output of 8.82 kW (design for India). The expected output of the plant is approximately 13,000 kWh. The current annual consumption is 6,000 kWh. The education center has very different consumption situations caused by events with up to 150 people. This requires the performance of the PV system to be greater than that corresponding to the average consumption. The plant will be built as a stand-alone system with network interconnection.

Components used are:
  • 1 island inverter 5 kW
  • 2 inverters with 4 kW each
  • A battery with a storage capacity of 700 Ah

Drinking water treatment

Drinking water treatment

The water treatment plant will be constructed as a reverse osmosis system with the following components:

The aim of this project is to implement two major improvements to provide:

  • Supply pump
  • Microfilter (2-fold)
  • High-pressure pump
  • RO membrane (2-fold)
  • Flow indicator
  • Pressure indicator
  • Blenders
  • UV disinfection

Project Partners

About the Deutsche Energie-Agentur GmbH (dena) – the German Energy Agency

The initiative "renewables - Made in Germany" was launched by the German Parliament in 2002 and is run by the Federal Ministry of Economics and Technology. The main objective is to contribute to climate protection by stimulating the acceptance and use of renewable energy around the world. By showcasing Germany's technical expertise in the field of renewable energy and by organising business trips to and from Germany, the export initiative facilitates business contacts between companies in Germany and abroad. The platform provides information about German renewable energy technologies and contact data of German suppliers.

About the dena Solar Roofs Programme

The “dena Solar Roofs Programme” was developed by the Deutsche Energie-Agentur GmbH (dena) – the German Energy Agency. Launched in 2004, this programme, co-financed by the Federal Ministry of Economics and Technology, supports German solar energy companies entering new markets. Within the framework of the programme reference and demonstration projects are installed on the roofs of designated institutions in different countries around the world. The installation is accompanied by comprehensive marketing and training programmes. These projects impressively present high-quality solar technology.

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