With the support of dena (German Energy Agency) PA-ID was able to implement a 2Power pilot project in Cape Verde in 2022.
Since November 2022 the guesthouse Casa Strela in Tarrafal on the island of Santiago is equipped with an innovative 2Power system, which produces electricity and hot water out of one module.
The 2Power-Modules are the special feature of this system. They generate electricity and heat simultaneously and are the centerpiece of each 2Power system.
The 2Power module consists of a monocrystalline solar cell, a heat exchanger and insulation. The liquid in the heat exchanger, which is located between the solar cell and insulation is heated by solar radiation and is used for the hot water supply.
The number of 2Power modules depends on the expected and average heat demand. For this project, 8 2Power modules were installed and complemented by so-called 1Power modules (classic photovoltaic modules).This ensures that there is only as much heat generated as needed and the remaining available roof area can be used for power generation.
The 2Power module simultaneously generates 305 Wp electric and 685 Wp thermal. The photovoltaic modules provide an output of 325 Wp /module.
The system was supplemented by an SMA inverter, a solar station with controller and a so-called hygienic stratified storage tank, a hot water storage tank, which prevents the formation of legionella, so that the domestic water can be used for cosumption. The stratified storage tank saves energy costs, because the water can always be taken in layers – In a normal buffer tank, the water is mixed and therefore has to be reheated earlier.
These 2Power-Systems are very efficient and best suited for hotels and every project where warmth is needed in addition to electricity. Furthermore, the roof area of hotels is often very limited. Contrary to separate photovoltaic Systems, with 2Power, there is far less space needed.
The RES Project Cape Verde is supported by the German Federal Ministry for Economic Affairs and Climate
Action as part of the Renewable Energy Solutions Programme of the German Energy Solutions Initiative
German Energy Agency (dena)
The German Energy Agency (dena) is a centre of excellence for the applied energy transition and climate protection. dena studies the challenges of building a climate-neutral society and supports the German government in achieving its energy and climate policy objectives. Since its foundation in 2000, dena has worked to develop and implement solutions and bring together national and international partners from politics, industry, the scientific community and all parts of society. dena is a project enterprise and a public company owned by the German federal government. dena’s shareholders are the Federal Republic of Germany and the KfW Group. www.dena.de/en
German Energy Solutions Initiative
With the aim of positioning German technologies and know-how worldwide, the German Energy Solutions Initiative of the Federal Ministry of Economics and Climate Action (BMWK) supports suppliers of climate-friendly energy solutions in opening up foreign markets. The focus lies on renewable energies, energy efficiency, smart grids and storage, as well as technologies such as power-to-gas and fuel cells. Aimed in particular at small and medium-sized enterprises, the German Energy Solutions Initiative supports participants through measures to prepare market entry as well as to prospect, develop and secure new markets. www.german-energy-solutions.de/en
Renewable Energy Solutions Programme (RES Programme)
With the RES programme, the Energy Export Initiative of the Federal Ministry of Economics and Climate Action (BMWK) helps German companies in the renewable energy and energy efficiency sectors enter new markets. Within the framework of the programme, reference plants are installed and marketed with the support of the German Energy Agency (dena). Information and training activities help ensure a sustainable market entry and demonstrate the quality of climate-friendly technologies made in Germany. www.german-energy-solutions.de/res-programm.html