Less Efficient Solar Panels Produce More?

Brad had a very good question that I thought needed to be explained in a post of it’s own.

I’m confused as to how a less efficient system (measured under PTC) could output more.

The simple answer is – if there are more of the ‘less efficient’ panels.

How Many Solar Panels Do I Need?

Step 1: Determine your solar array size in kW and enter it into the calculator below.

Step 2: Decide which solar panels you want to use, and enter the DC Watt rating of the specific solar panel model you want to use into the calculator below.