For calculation of solar PV plants, several national tools for calculating the production potential is available, but to plan for an optimal size of a PV plant more than that is needed. A tool is needed to compare the production with the energy use of the building, to choose the optimal size. Also a better tool for financial calculation is needed. Existing tool for that has most often very rough calculations without the possibility of changing different parameters.
EFFECT4buildings has developed a tool with input from all partners and translated into English. The excel-tool for solar energy calculations can be downloaded from the Prosumerism page. It is the Calculation Tool no 4b.
The result is an excel-tool to calculate optimal size of solar PV plant and the economical profitability in 3 steps:
Step 1: Find out the optimal size of the PV plant
If the roof can produce more electricity than needed, step one helps to calculate the optimal size. In this step a few data inputs are needed.
Individual data for energy use can be inserted or general data can be used.
Step 2: Find out how much electricity your roof can produce
– A list of national web calculation tools to calculate the production capacity of a roof.
Step 3: Financial calculation
– In the last step the profitability can be calculated.
EFFECT4buildings is implemented with the support from the Interreg Baltic Sea Region Program 2014-2020 (European Regional Development Fund) and Norwegian national funding. The aim of the project is to improve the capacity of public building managers in the Baltic Sea Region by providing a comprehensive decision-making support toolbox with a set of financial instruments to unlock the investments and lower the risks of implementing energy efficiency measures in buildings owned by public stakeholders. For more information: http://www.effect4buildings.se
Text author: Marit Ragnarsson, EFFECT4buildings Project Manager, Länsstyrelsen Dalarnas län