I received the product without the manual. Then it turned out that the manual of this product does not exist. I was sent PDF file of an old version that didn't include controller. Diameter of my pole is 48 mm and the product came with a rubber sheet to fill the empty space around the pole. Unfortunately the sheet was too short when I tried to install it around the pole. I have to wait until the Spring to start using the turbine and thus don't know its performance yet. I'm, however, skeptical about the 600 W max power, because the plus and minus wires from the turbine are less than 2 mm2 diameter. They should be at least 4 mm2 for such power.