Our team developed the first low-energy project in the province of Isfahan about four years ago in compliance with Topic 19 of the national building regulations of Iran. Even though the project is still being built and I don’t know if our design will be used in its construction, I’ll do my best to break down the project’s design into small sections. Let me explain. Based on my estimates, I designed a 40 kW solar power plant for the roof in the first section, which I share on my personal website. You can download the AutoCAD map and associated PVSYST design from the link below. Iranian panels were used in this project. I simulated a PV system using the manufacturer’s catalogue, as there was none in the database. I will share with you, step by step, my electrical design.