Solar panel dimensions depend on how many cells are in each panel, as cell size is pretty uniform across all brands of residential solar panels. Each cell is usually 156 millimeters by 156 millimeters, or 6 inches long and 6 inches wide.
[pdf] A 2kW solar system typically consists of 8 panels, each made of 250 Watt modules. The modules measure approximately 1.6 meters by 1 meter. So, for a 2-kilowatt rooftop solar system with 8 solar panels, you will need at least 13 square meters of roof space suitable for a photovoltaic installation.
[pdf] Choose an inverter with a continuous power rating that meets or exceeds the running wattage and a surge power rating that can handle the initial surge. It’s recommended to select an inverter 20-25% larger than the calculated size to ensure efficiency and accommodate any power surges.
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