These are precise, computer-aided design drawings (think AutoCAD or similar) that lay out everything for your PV system: panel placement, wiring routes, structural attachments, grounding/earthing, electrical flow, etc. The tilt of solar panels is important for good sun capture. The regulator manages the energy produced to avoid waste. Solar photovoltaic energy is booming. A free online tool to easily create, customize, and export professional solar power system diagrams. A solar CAD drawing is a scaled technical plan created using CAD software (like AutoCAD) that shows the layout, electrical design, and structural components of a solar PV system. DWG format available upon request.