I Sverige finns ett långsiktigt mål som innebär att all energi som används i landet ska komma från förnybara källor. För att uppfylla detta behöver solens energi tas tillvara. Det är vad företaget Solibro Research AB arbetar med genom sin forskning och tillverkning av tunnfilmssolceller. Att solcellspaneler lämpar sig för takinstallation är välkänt i Sverige, men få känner till att de även passar bra som fasadmaterial. Solibro har en önskan om att anpassa sina moduler till fasader, vilket hindrats av okunskapen om vilka lagar och regler som finns och hur modulerna monteras på väggen. Syftet med rapporten har därför varit att jämföra de system som finns för infästning av solcellsmoduler på fasader och att utreda vilka svenska lagkrav som måste tas hänsyn till vid dimensionering av anläggningen. Målet har varit att ge Solibro en rekommendation för lämpliga montagesystem och information kring gällande svenska regler för fasadmontage av solcellspaneler. Arbetet har byggt på intervjuer, studier av referensobjekt och en litteraturstudie över svenska standarder och byggregler. En utredning har även gjorts över vilka certifieringar som finns. Resultatet visar att kraven är på väg att bli tydligare och mer omfattande. I den nationella standard som fastställts i maj 2016 har de tidigare skilda kraven på solcellspaneler och byggnader kombinerats. Svenska certifieringar har ännu inte upprättats och därför rekommenderas den tyska TÜV-certifieringen. Vid jämförelse av infästningar har fönsterprofiler visat sig vara de enda vädertäta. Allmänt rekommenderas kassettsystem och för Solibro har specifik rekommendation getts beroende på modultyp. / A long term goal in Sweden is to achieve a 100 percent use of energy from renewable sources. Energy from the sun is a valuable source to obtain this, which is what the thin-film solar cell science company Solibro Research AB is aiming for. The benefits of rooftop photovoltaic installations are well known. However the advantages of integrating photovoltaic modules in façades are not as widely spread. Depending on requested function and expression, photovoltaics can be performed as building integrated or applied systems. Solibro’s desires to customize their modules for façade solutions have been held up by complicated rules and regulations. The purpose of this report has therefore been to describe regulatory Swedish standards. The aim has been to gain enough knowledge to present a recommendation to Solibro regarding appropriate façade mounting, approved by Swedish law. This thesis has been built on interviews, studies of reference objects, investigation of related regulations and available certifications. The newly released standard, SS-EN 50583 have combined regulations for buildings and photovoltaic modules. Among studied systems the window mounting system proves to be the only one suitable when weather protection is required. Otherwise the cassette system is recommended.

Renovating roofs of multi-family buildings with building integrated photovoltaics (BIPV) poses a possibility of cost effective installation of solar cells. The surplus electricity could however become a problem for the grid and decrease the profitability of the investment. In this study, the economical possibilities for a BIPV renovation and for batteries and a thermal storage to store the surplus electricity is evaluated. A study has been made for a multi-family building in Jönköping which is built within the time period of the Swedish Million Programme. Several cases were examined where the renovation was combined with installation of BIPV, a heat recovery system (HRV) or heat pump and a possibility of batteries and/or thermal storage. The management of surplus electricity was modelled and the net present value (NPV) for the cases as well as the value of energy storage was calculated. The NPV was positive for all the cases with BIPV renovation, which means that the BIPV renovation is profitable. The alternative cost for the renovation was seen to have a big impact on the profitability. Both the batteries and the thermal storage decreased the NPV and are therefore not profitable today. To increase the profitability of energy storage the investment cost must decrease and/or the energy prices increase. Other possibilities to increase the profitability of the investment was found; to make use of the different political support systems, or to have a group subscription where also the household electricity can be supplied by the solar production. / Miljontak - takrenovering med solceller

This thesis aims to compare the performance of building integrated PV to “market leading” building applied PV and determine which technology is the most profitable. A case study is conducted of the real estate company Vasakronan’s two buildings Magasin X and Celsius which have both building-integrated PV in the facade and building-applied PV on the roof. The power output from the building-integrated PV systems compared to the building-applied PV systems is studied for each of the four seasons of the year. The system design including technical specifications for the modules and inverters as well as relevant weather data for Uppsala was implemented in the simulation software SAM. By simulating the PV systems in SAM an expected power profile is generated which in comparison with the actual power output from the PV systems could indicate if they are performing optimally. A Life Cycle costing (LCC) analysis is performed to give an understanding of the economic profitability of the different technologies over time. To include the perspective of the challenges in expanding the market for building integrated PV in Sweden, two interviews are conducted.  The results show that the BIPV generates more energy than the BAPV per square meter during the winter. During the spring and autumn, the weather conditions have a great impact on the perfor- mance of the solar modules. During sunny days of spring the temperature of the modules increase which decrease their efficiency and hence the generated power. The results also indicate that the actual power output from both the BIPV and the BAPV overall are performing as expected from the theoretically generated power in SAM. There are cases where the facade-integrated photovoltaics exceed its theoretical power output values. In contrast, roof-applied photovoltaics exhibit a closer correlation with theoretical values, although with a tendency to underperform overall.The life cycle cost analysis indicates that for both buildings, Magasin X and Celsius, only the BAPV system is profitable. In contrast, the BIPV installation is not cost-effective without subsidies. However, as shown in the sensitivity analysis, the electricity price is a factor which has a large impact on the profitability of the system. With a doubled electricity price the entire solar cell installation of Mag- asin X has a pay-back time of 10.6 years and is considered profitable. It can also be concluded that there is a lack of knowledge of how to implement BIPV in the most efficient way as well as what amount of energy the BIPV systems are expected to generate. To expand the BIPV market, stakeholders need to share their knowledge and a standardized process will need to be developed for choosing BIPV for new buildings. Subventions can motivate companies to implement BIPV in practice which is crucial for the spreading of such knowledge and the future development of BIPV.