Reading Solar Panel Labl

The max power rating in watts that your solar panels are rated at is the figure that everyone quotes when talking about panel size.

Reading solar panel labl.

On the lower part of the label there are icons of all the certifications this specific panel has passed. Solar cells are typically about 4 5 wide by 4 5 tall. Commercial solar panels have 72 cells but they are much too big for residential roofs. If the installer or salesperson talks aout a 190w or 250w panel they are talking about the max power rating of the panels.

It starts to get tricky when you move away from battery based solar systems and the 12v increments are no longer necessary. The example photo of a solar pv label indicates name and address of the manufacturer and the solar module type blackened. Any bigger than this and it would be difficult to install them on residential roofs where space can be an issue. The solar panel description usually starts with the name of the manufacturer then the category of solar module and afterward the solar panel wattage.

Here are a couple of examples. Grid tie solar panels with 60 cells are often referred to as 20v nominal panels like the solarworld sunmodule 290w solar panel. Residential solar panels have 60 cells and so are about 3 feet wide by 5 feet tall.