Solar Panel Special Dicount : www.amazon.com In evaluating solar panels (and systems of many panels) the typical pricepoint is $5.10/watt in high volume production. If you are finding better pricing than that something is wrong. An example may be inefficient panels that use larger panels, causing massive panel size such that it is 4-8 times larger than this panel with the same output. Other inefficiencies to watch out for are caused by voltages that are not useful. You could, for example, have a panel that output 500V at 1/10 A for 50W sold for $250 – looks good financially but very few charge controllers go much over 250 volts (and many dont make 250 volts – some are 12 or 48 volt systems). So that panel is not much use