Amazing new solar measurement unit discovered!

Here's something new to me! We have two banks of solar panels that are closely monitored but today one bank was consistently generating about 50W less. I looked out over the solar array and something big, something black was on top of a panel. Is that a stick? a Fox poo? How would a Fox even get up there...

It was not a stick nor Fox doings, but an enourmous bird dollop! So, apparently, we now measure the size of droppings in "Watts stolen". That's a new unit for science and you saw it here first!