A 2kWp roof-integrated photovoltaic system was studied to see how well it generated electricity and saved energy for a house. The system's performance was affected by sunlight and temperature. The researchers found that the system could produce around 52% of the electricity needed for a typical house in a year. They used data from winter days to create a formula that accurately predicted electricity generation. This shows that building-integrated solar panels can be effective in reducing energy costs for homeowners.